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Chaudhary P, Verma A, Chaudhary S, Kumar M, Lin MF, Huang YC, Chen KL, Yadav BC. Design of a Humidity Sensor for a PPE Kit Using a Flexible Paper Substrate. Langmuir 2024; 40:9602-9612. [PMID: 38651307 DOI: 10.1021/acs.langmuir.4c00366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
The present work reports the rapid sweat detection inside a PPE kit using a flexible humidity sensor based on hydrothermally synthesized ZnO (zinc oxide) nanoflowers (ZNFs). Physical characterization of ZNFs was done using scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transmission infrared spectroscopy (FTIR), UV-visible, particle size analysis, Raman analysis, and X-ray photoelectron spectroscopy (XPS) analysis, and the hydrophilicity was investigated by using contact angle measurement. Fabrication of a flexible sensor was done by deposition on the paper substrate using the spin coating technique. It exhibited high sensitivity and low response and recovery times in the humidity range 10-95%RH. The sensor demonstrated the highest sensitivity of 296.70 nF/%RH within the humidity range 55-95%RH, and the rapid response and recovery times were also calculated and found as 5.10/1.70 s, respectively. The selectivity of the proposed sensor was also analyzed, and it is highly sensitive to humidity. The humidity sensing characteristics were theoretically witnessed in terms of the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) and electronic properties of sensing materials in ambient and humid conditions. These theoretical results are evidence of the interaction of ZnO with humidity. Overall, the present study provides a scope of architecture-enabled paper-based humidity sensors for the detection of sweat levels inside PPE kits for health workers.
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Affiliation(s)
- Priyanka Chaudhary
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
| | - Arpit Verma
- Nanomaterials and Sensors Research Laboratory, Department of Physics, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh 226025, India
| | - Sandeep Chaudhary
- Department of Mathematics, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh 226025, India
| | - Mahesh Kumar
- Department of Electrical Engineering, Indian Institute of Technology Jodhpur, Jodhpur 342011, India
| | - Meng-Fang Lin
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
| | - Yu-Ching Huang
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
| | - Kuen-Lin Chen
- Department of Physics, National Chung Hsing University, Taichung 40227, Taiwan
| | - B C Yadav
- Nanomaterials and Sensors Research Laboratory, Department of Physics, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh 226025, India
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Sánchez-Silva JM, Ojeda-Galván HJ, Villabona-Leal EG, Labrada-Delgado GJ, Aguilar-Maruri SA, Fuentes-Ramírez R, González-Ortega O, López-Ramón MV, Ocampo-Pérez R. Synergistic photocatalysis of a hydrochar/CeO 2 composite for dye degradation under visible light. Environ Sci Pollut Res Int 2024; 31:16453-16472. [PMID: 38321273 DOI: 10.1007/s11356-024-32281-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Accepted: 01/27/2024] [Indexed: 02/08/2024]
Abstract
The synthesis and characterization of a hydrochar/CeO2 composite along with its evaluation in methylene blue degradation under visible light are presented. The methodology consisted of a single-pass hydrothermal method, having as synthesis conditions 9 h of reaction time, 210 °C, autogenous pressure, and a biomass/CeO2 ratio of 100:1. The composite characterization revealed good dispersion of CeO2 in the carbonaceous matrix and significant synergy in the composite activation using visible irradiation. The photodegradation experiments showed an efficiency of 98% for white LED light, 91% for UV light, 96% for solar irradiation, and 85% for blue LED light using as conditions pH 7.0, 50 mg of composite, 50 mL of solution, 10 mg/L of dye initial concentration, and 120 min of contact time. Meanwhile, the reusability experiments evidenced a reuse capacity of up to five times with a constant photodegradation efficiency (99%); moreover, it was determined that the presence of electrolytes at pH below 7.0 during degradation negatively affected methylene blue degradation. Finally, the results of this work demonstrate that the hydrochar/CeO2 composite can be synthesized by a green method and used for the efficient treatment of water contaminated with methylene blue.
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Affiliation(s)
- Jonathan Michel Sánchez-Silva
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, 78260, San Luis Potosí, Mexico
| | - Hiram Joazet Ojeda-Galván
- Centro de Investigación en Ciencias de la Salud y Biomedicina (CICSAB), Universidad Autónoma de San Luis Potosí, 78210, San Luis Potosí, Mexico
| | - Edgar Giovanny Villabona-Leal
- Centro de Investigación en Ciencias de la Salud y Biomedicina (CICSAB), Universidad Autónoma de San Luis Potosí, 78210, San Luis Potosí, Mexico
| | | | - Saul Alejandro Aguilar-Maruri
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, 78260, San Luis Potosí, Mexico
| | | | - Omar González-Ortega
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, 78260, San Luis Potosí, Mexico
- Centro de Investigación en Ciencias de la Salud y Biomedicina (CICSAB), Universidad Autónoma de San Luis Potosí, 78210, San Luis Potosí, Mexico
| | - María Victoria López-Ramón
- Departamento de Química Inorgánica y Orgánica, Facultad de Ciencias Experimentales, Universidad de Jaén, 23071, Jaén, Spain
| | - Raúl Ocampo-Pérez
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, 78260, San Luis Potosí, Mexico.
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Süngü Akdogan ÇZ, Akbay Çetin E, Onur MA, Önel S, Tuncel A. In Vitro Synergistic Photodynamic, Photothermal, Chemodynamic, and Starvation Therapy Performance of Chlorin e6 Immobilized, Polydopamine-Coated Hollow, Porous Ceria-Based, Hypoxia-Tolerant Nanozymes Carrying a Cascade System. ACS Appl Bio Mater 2024. [PMID: 38380497 DOI: 10.1021/acsabm.3c01181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
A synergistic therapy agent (STA) with photothermal, photodynamic, chemodynamic, and starvation therapy (PTT, PDT, CDT, and ST) functions was developed. Hollow, mesoporous, and nearly uniform CeO2 nanoparticles (H-CeO2 NPs) were synthesized using a staged shape templating sol-gel protocol. Chlorin e6 (Ce6) was adsorbed onto H-CeO2 NPs, and a thin polydopamine (PDA) layer was formed on Ce6-adsorbed H-CeO2 NPs. Glucose oxidase (GOx) was bound onto PDA-coated Ce6-adsorbed H-CeO2 NPs to obtain the targeted STA (H-CeO2@Ce6@PDA@GOx NPs). A reversible photothermal conversion behavior with the temperature elevations up to 34 °C was observed by NIR laser irradiation at 808 nm. A cascade enzyme system based on immobilized GOx and intrinsic catalase-like activity of H-CeO2 NPs was rendered on STA for enhancing the effectiveness of PDT by elevation of ROS generation and alleviation of hypoxia in a tumor microenvironment. Glucose-mediated generation of highly toxic hydroxyl radicals (·OH) was evaluated for CDT. The effectiveness of PDT on glioblastoma T98G cells was markedly enhanced by O2 generation started by the decomposition of glucose. A similar increase in cell death was also observed when ST and CDT functions were enhanced by photothermal action. The viability of T98G cells decreased to 10.6% by in vitro synergistic action including ST, CDT, PDT, and PTT without using any antitumor agent.
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Affiliation(s)
- Çağıl Zeynep Süngü Akdogan
- Bioengineering Division, Hacettepe University, Ankara 06800, Turkey
- Graduate School of Science and Engineering, Hacettepe University, Ankara 06800, Turkey
| | - Esin Akbay Çetin
- Department of Biology, Hacettepe University, Ankara 06800, Turkey
| | - Mehmet Ali Onur
- Bioengineering Division, Hacettepe University, Ankara 06800, Turkey
- Department of Biology, Hacettepe University, Ankara 06800, Turkey
| | - Selis Önel
- Bioengineering Division, Hacettepe University, Ankara 06800, Turkey
- Chemical Engineering Department, Hacettepe University, Ankara 06800, Turkey
| | - Ali Tuncel
- Bioengineering Division, Hacettepe University, Ankara 06800, Turkey
- Chemical Engineering Department, Hacettepe University, Ankara 06800, Turkey
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Rezaei M, Nezamzadeh-Ejhieh A, Massah AR. A Comprehensive Review on the Boosted Effects of Anion Vacancy in the Heterogeneous Photocatalytic Degradation, Part II: Focus on Oxygen Vacancy. ACS Omega 2024; 9:6093-6127. [PMID: 38371849 PMCID: PMC10870278 DOI: 10.1021/acsomega.3c07560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 01/10/2024] [Accepted: 01/11/2024] [Indexed: 02/20/2024]
Abstract
Environmental problems, including the increasingly polluted water and the energy crisis, have led to a need to propose novel strategies/methodologies to contribute to sustainable progress and enhance human well-being. For these goals, heterogeneous semiconducting-based photocatalysis is introduced as a green, eco-friendly, cost-effective, and effective strategy. The introduction of anion vacancies in semiconductors has been well-known as an effective strategy for considerably enhancing the photocatalytic activity of such photocatalytic systems, giving them the advantages of promoting light harvesting, facilitating photogenerated electron-hole pair separation, optimizing the electronic structure, and enhancing the yield of reactive radicals. This Review will introduce the effects of anion vacancy-dominated photodegradation systems. Then, their mechanism will illustrate how an anion vacancy changes the photodegradation pathway to enhance the degradation efficiency toward pollutants and the overall photocatalytic performance. Specifically, the vacancy defect types and the methods of tailoring vacancies will be briefly illustrated, and this part of the Review will focus on the oxygen vacancy (OV) and its recent advances. The challenges and development issues for engineered vacancy defects in photocatalysts will also be discussed for practical applications and to provide a promising research direction. Finally, some prospects for this emerging field will be proposed and suggested. All permission numbers for adopted figures from the literature are summarized in a separate file for the Editor.
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Affiliation(s)
- Mahdieh Rezaei
- Department
of Chemistry, Shahreza Branch, Islamic Azad
University, P.O. Box 311-86145, Shahreza, Isfahan 86139-74183, Iran
| | - Alireza Nezamzadeh-Ejhieh
- Department
of Chemistry, Shahreza Branch, Islamic Azad
University, P.O. Box 311-86145, Shahreza, Isfahan 86139-74183, Iran
- Department
of Chemistry, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Isfahan 81551-39998, Iran
| | - Ahmad Reza Massah
- Department
of Chemistry, Shahreza Branch, Islamic Azad
University, P.O. Box 311-86145, Shahreza, Isfahan 86139-74183, Iran
- Department
of Chemistry, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Isfahan 81551-39998, Iran
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Zhang S, Khan S, Naz F, Noman A, Nawaz A, Ali S, Saeed K, Ali N, Ge M. Robust iron-doped manganese oxide nanoparticles from facile fabrication to photo-catalytic degradation application of binary dyes mixture. Environ Res 2024; 240:117384. [PMID: 37858685 DOI: 10.1016/j.envres.2023.117384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 10/07/2023] [Accepted: 10/11/2023] [Indexed: 10/21/2023]
Abstract
The manganese oxide (MnO2 and iron-doped manganese oxide (Fe-MnO2) nanoparticles (NPs) with reduced band gap (Eg) were fabricated through the co-precipitation process. They used to degrade Indigo Carmine (IC) and Rhodamine B (RB) binary mixture in an aqueous medium under solar light irradiation. From FT-IR, the twisting modes of the Mn-O bond and the stretching vibrations of the Fe-Mn-O2 bond were confirmed from the peaks observed at 480 cm-1,584 cm-1,675 cm-1, and 900 cm-1, 1150 cm-1, and 1200 cm-1 respectively. The MnO2 has an optical band gap of 3.2 eV, which was decreased to 3 eV in Fe-MnO2. The zero charge (PZC) point was 8 for Fe-MnO2 and 7 for MnO2. The BET surface area for Fe-MnO2 was 398 m2/g, relatively higher than MnO2 particles, having a surface area of 384 m2/g. The average crystallite sizes calculated from Scherer formulae were 37 nm for MnO2 and 31 nm for Fe-MnO2 NPs. SEM confirmed the irregular morphology of the prepared particles. It was analyzed that agglomeration occurs in MnO2 than the Fe-MnO2. The maximum degradation of IC dye was 99%, and that of RB was 98% at the optimum conditions. The data were best fitted to second-order kinetics.
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Affiliation(s)
- Shizhong Zhang
- National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization, Huaiyin Institute of Technology, Huaian, 223003, China.
| | - Sohail Khan
- National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization, Huaiyin Institute of Technology, Huaian, 223003, China
| | - Falak Naz
- Department of Chemistry, Bacha Khan University, Charsadda, 24420, KPK, Pakistan.
| | - Ayesha Noman
- Department of Chemistry, Bacha Khan University, Charsadda, 24420, KPK, Pakistan
| | - Arif Nawaz
- Department of Chemistry, Bacha Khan University, Charsadda, 24420, KPK, Pakistan
| | - Sajid Ali
- Department of Chemistry, Bacha Khan University, Charsadda, 24420, KPK, Pakistan
| | - Khalid Saeed
- Department of Chemistry, Bacha Khan University, Charsadda, 24420, KPK, Pakistan
| | - Nisar Ali
- National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization, Huaiyin Institute of Technology, Huaian, 223003, China.
| | - Ming Ge
- School of Chemistry and Chemical Engineering, Nantong University, Nantong, 226001, China
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Chahal S, Phor L, Kumar A, Kumar S, Kumar S, Kumar R, Kumar P. Enhanced photocatalytic degradation of organic dye by CeO 2/CNT/GO hybrid nanocomposites under UV light for wastewater treatment. Environ Sci Pollut Res Int 2023; 30:124964-124975. [PMID: 36867333 DOI: 10.1007/s11356-023-26184-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 02/24/2023] [Indexed: 12/30/2023]
Abstract
Development of nanocomposites as efficient photocatalysts for the removal of hazardous organic pollutants is always in dire demand due to increase in water pollution. In this article, a facile sol-gel method has been used to synthesize cerium oxide (CeO2) nanoparticles followed by their decoration over multi-walled carbon nanotubes (CNTs) and graphene oxide (GO) to construct binary as well ternary hybrid nanocomposites using ultrasonic treatment. The oxygen vacancy defects have been depicted using X-ray photoelectron spectroscopy (XPS) that may result into improved photocatalytic efficiency. The ternary hybrid nanocomposites (CeO2/CNT/GO) showed excellent photocatalytic efficiency towards degradation of rose bengal (RB) dye up to 96.9% in 50 min. CNTs and GO provide the interfacial charge transfer which inhibits the electron-hole pair recombination. The results obtained here indicate that these composites can be effectively utilized as promising materials for the degradation of harmful organic pollutants for wastewater treatment.
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Affiliation(s)
- Surjeet Chahal
- Materials and Nano Engineering Research Laboratory, Dept. of Physics, School of Physical Sciences, DIT University, Dehradun, 248009, India
- Deenbandhu Chhotu Ram University of Science and Technology, Murthal, Haryana, 131039, India
| | - Lakshita Phor
- Deenbandhu Chhotu Ram University of Science and Technology, Murthal, Haryana, 131039, India
| | - Ashok Kumar
- Deenbandhu Chhotu Ram University of Science and Technology, Murthal, Haryana, 131039, India
| | - Suresh Kumar
- Deenbandhu Chhotu Ram University of Science and Technology, Murthal, Haryana, 131039, India
| | - Sandeep Kumar
- J.C. Bose University of Science and Technology, YMCA, Faridabad, Haryana, 121006, India
| | - Ravi Kumar
- J.C. Bose University of Science and Technology, YMCA, Faridabad, Haryana, 121006, India
| | - Parmod Kumar
- J.C. Bose University of Science and Technology, YMCA, Faridabad, Haryana, 121006, India.
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Xu Y, Yan B, Lai C, Wang M, Cao Y, Tu J, Chen D, Liu Y, Wu Q. High-performance Vo-ZnO/ZnS benefiting nanoarchitectonics from the synergism between defect engineering and surface engineering for photoelectrochemical glucose sensors. RSC Adv 2023; 13:19782-19788. [PMID: 37396832 PMCID: PMC10312125 DOI: 10.1039/d3ra02869k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Accepted: 06/19/2023] [Indexed: 07/04/2023] Open
Abstract
In this study, a ZnO/ZnS nanocluster heterojunction photoelectrode rich in surface oxygen defects (Vo-ZnO/ZnS) was prepared by applying a simple in situ anion substitution and nitrogen atmosphere annealing method. The synergism between defect and surface engineering significantly improved the photocatalysts. Given this synergism, Vo-ZnO/ZnS was endowed with a long carrier lifetime, narrow band gap, high carrier density, and high performance toward electron transfer under light conditions. Thus, Vo-ZnO/ZnS had three times the photocurrent density of ZnO under light illumination. To further evaluate its advantages in the field of photoelectric bioassay, Vo-ZnO/ZnS was applied as the photocathode of photoelectric sensor system for glucose detection. Vo-ZnO/ZnS showed excellent performance in glucose detection in various aspects, including a low detection limit, high detection sensitivity, and a wide detection range.
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Affiliation(s)
- Yongtao Xu
- State Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan University Haikou 570228 P. R. China
| | - Bingdong Yan
- State Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan University Haikou 570228 P. R. China
| | - Caiyan Lai
- State Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan University Haikou 570228 P. R. China
| | - Mingyu Wang
- State Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan University Haikou 570228 P. R. China
| | - Yang Cao
- State Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan University Haikou 570228 P. R. China
| | - Jinchun Tu
- State Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan University Haikou 570228 P. R. China
| | - Delun Chen
- State Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan University Haikou 570228 P. R. China
| | - Youbin Liu
- The Second Affiliated Hospital, School of Tropical Medicine, Hainan Medical University Haikou 570311 P. R. China
| | - Qiang Wu
- The Second Affiliated Hospital, School of Tropical Medicine, Hainan Medical University Haikou 570311 P. R. China
- Key Laboratory of Emergency and Trauma of Ministry of Education, Research Unit of Island Emergency Medicine, Chinese Academy of Medical Sciences (No. 2019RU013), Hainan Medical University Haikou 571199 P. R. China
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Ai X, Yan S, Lin C, Lu K, Chen Y, Ma L. Facile Fabrication of Highly Active CeO 2@ZnO Nanoheterojunction Photocatalysts. Nanomaterials (Basel) 2023; 13:1371. [PMID: 37110956 PMCID: PMC10143434 DOI: 10.3390/nano13081371] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Revised: 04/07/2023] [Accepted: 04/13/2023] [Indexed: 06/19/2023]
Abstract
Photocatalyst performance is often limited by the poor separation and rapid recombination of photoinduced charge carriers. A nanoheterojunction structure can facilitate the separation of charge carrier, increase their lifetime, and induce photocatalytic activity. In this study, CeO2@ZnO nanocomposites were produced by pyrolyzing Ce@Zn metal-organic frameworks prepared from cerium and zinc nitrate precursors. The effects of the Zn:Ce ratio on the microstructure, morphology, and optical properties of the nanocomposites were studied. In addition, the photocatalytic activity of the nanocomposites under light irradiation was assessed using rhodamine B as a model pollutant, and a mechanism for photodegradation was proposed. With the increase in the Zn:Ce ratio, the particle size decreased, and surface area increased. Furthermore, transmission electron microscopy and X-ray photoelectron spectroscopy analyses revealed the formation of a heterojunction interface, which enhanced photocarrier separation. The prepared photocatalysts show a higher photocatalytic activity than CeO2@ZnO nanocomposites previously reported in the literature. The proposed synthetic method is simple and may produce highly active photocatalysts for environmental remediation.
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Affiliation(s)
- Xiaoqian Ai
- School of Physics and Information Engineering, Jiangsu Province Engineering Research Center of Basic Education Big Data Application, Jiangsu Second Normal University, Nanjing 210013, China; (X.A.)
| | - Shun Yan
- School of Electronic Engineering, Nanjing Xiaozhuang University, Nanjing 211171, China
| | - Chao Lin
- School of Electronic Engineering, Nanjing Xiaozhuang University, Nanjing 211171, China
| | - Kehong Lu
- School of Physics and Information Engineering, Jiangsu Province Engineering Research Center of Basic Education Big Data Application, Jiangsu Second Normal University, Nanjing 210013, China; (X.A.)
| | - Yujie Chen
- School of Physics and Information Engineering, Jiangsu Province Engineering Research Center of Basic Education Big Data Application, Jiangsu Second Normal University, Nanjing 210013, China; (X.A.)
| | - Ligang Ma
- School of Electronic Engineering, Nanjing Xiaozhuang University, Nanjing 211171, China
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Abutaleb A, Imran M, Zouli N, Khan AH, Hussain S, Ali MA, Bakather O, Gondal MA, Khan NA, Panchal H, Zahmatkesh S. Fe 3O 4-multiwalled carbon nanotubes-bentonite as adsorbent for removal of methylene blue from aqueous solutions. Chemosphere 2023; 316:137824. [PMID: 36640990 DOI: 10.1016/j.chemosphere.2023.137824] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 12/28/2022] [Accepted: 01/10/2023] [Indexed: 06/17/2023]
Abstract
The contamination of water due to present of dyes, poses serious health problems. Therefore, treatment of contaminated water is necessary to resolve this problem. A tailored co-precipitation technique has been successfully used to prepare Fe3O4-multiwalled Carbon Nanotubes (MWCNTs)-Bentonite nanocomposite. The methylene blue present in aqueous solutions was removed using synthesized nanocomposite as adsorbent. The synthesized novel nanocomposite was analyzed by various characterization techniques. The scanning electron microscope analysis shows that Bentonite and Fe3O4 nanoparticles are well decorated with the MWCNTs matrix. The nanocomposite exhibited a high BET surface area of 204.01 m2/g with a pore volume of 0.367 cm3/g. The BJH adsorption average pore diameter was analyzed to be 7.2 nm. Moreover, the adsorption model was in agreement with the Redlich-Peterson model with adsorption capacity of 48.2 mg/g with a high nonlinear regression coefficient (R2 = 0.985) and a low chi-square value (χ2 = 6.18). Kinetics data were described well by pseudo-first-order and pseudo second order, models with a high non-linear regression coefficient (R2 = 0.993). Adsorption of MB dye was determined to be a non-spontaneous and endothermic process since the values of ΔG, and ΔH were positive, and the entropy value was negative. Thus, the synthesized nanocomposite established itself as a promising candidate for the water treatment process.
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Affiliation(s)
- Ahmed Abutaleb
- Department of Chemical Engineering, College of Engineering, Jazan University, P.O.Box 706, Jazan, 45142, Saudi Arabia.
| | - Mohd Imran
- Department of Chemical Engineering, College of Engineering, Jazan University, P.O.Box 706, Jazan, 45142, Saudi Arabia
| | - Nasser Zouli
- Department of Chemical Engineering, College of Engineering, Jazan University, P.O.Box 706, Jazan, 45142, Saudi Arabia
| | - Afzal Husain Khan
- Department of Civil Engineering, College of Engineering, Jazan University, P.O.Box 706, Jazan, 45142, Saudi Arabia
| | - Shahir Hussain
- Department of Electrical Engineering, College of Engineering, Jazan University, P.O.Box 706, Jazan, 45142, Saudi Arabia
| | - Mohammad Ashraf Ali
- Department of Chemical Engineering, College of Engineering, Jazan University, P.O.Box 706, Jazan, 45142, Saudi Arabia
| | - Omer Bakather
- Department of Chemical Engineering, College of Engineering, Jazan University, P.O.Box 706, Jazan, 45142, Saudi Arabia
| | - Mohammad Ashraf Gondal
- Laser Research Group, Physics Department, Center of Excellence in Nanotechnology, &K.A.CARE Energy Research and Innovation Center, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia
| | - Nadeem A Khan
- Department of Civil Engineering, Jamia Millia Islamia Central University, New Delhi, 110025, India
| | - Hitesh Panchal
- Mechanical Engineering Department, Government Engineering College Patan, Gujarat, India
| | - Sasan Zahmatkesh
- Tecnologico de Monterrey, Escuela de Ingenieríay Ciencias, Puebla, Mexico.
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Xia X, Li J, Chen C, Lan YP, Mao X, Chu Z, Ning D, Zhang J, Liu F. Collaborative influence of morphology tuning and RE (La, Y, and Sm) doping on photocatalytic performance of nanoceria. Environ Sci Pollut Res Int 2022; 29:88866-88881. [PMID: 35842513 DOI: 10.1007/s11356-022-21787-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 06/28/2022] [Indexed: 06/15/2023]
Abstract
Tuning morphology and doping additional rare earth (RE) cations are potential techniques to promote the photocatalytic performance of ceria (CeO2), evaluating the collaborative effects of morphology and RE dopants is significant for producing high active ceria-based catalysts. So in this work, cubic, polyhedral and rod-like nanoceria doped with 10 mol % La (lanthanum), Y (yttrium), or Sm (samarium) were synthesized by a facile template-free hydrothermal method. Phases, morphologies, oxygen vacancies (OVs) concentration, energy band structure, photo-carriers separation/recombination, and photodegradation ratio toward methylene blue (MB) dye of as prepared ceria were studied. Results show that doped CeO2 maintains a similar morphology structure with un-doped sample and the band gap narrows slightly. Y-doped nanoceria, with an improved separation and a reduced recombination of photo-excited electrons (e-) and holes (h+), owns a higher MB photodegradation ratio than that of samples doping with La or Sm, which is measured as 79.04, 84.43, and 85.59% for Y-doped cubic, polyhedral, and rod-like CeO2. The collaborative influence of morphology tuning and RE (La, Y, and Sm) doping on photocatalytic performance of nanoceria includes the effects of doped elements and the formation of OVs. The elevation of OVs concentration as well as the separation efficiency of photo-generated e-/h+ are suggested to further enhance the photocatalytic performance of ceria.
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Affiliation(s)
- Xuewen Xia
- Department of Metallurgical Engineering, College of Materials and Metallurgy, Guizhou University, Huaxi, Guiyang, Guizhou, 550025, China
- Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, Guiyang, Guizhou, 550025, China
| | - Junqi Li
- Department of Metallurgical Engineering, College of Materials and Metallurgy, Guizhou University, Huaxi, Guiyang, Guizhou, 550025, China
- Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, Guiyang, Guizhou, 550025, China
| | - Chaoyi Chen
- Department of Metallurgical Engineering, College of Materials and Metallurgy, Guizhou University, Huaxi, Guiyang, Guizhou, 550025, China
- Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, Guiyang, Guizhou, 550025, China
| | - Yuan-Pei Lan
- Department of Metallurgical Engineering, College of Materials and Metallurgy, Guizhou University, Huaxi, Guiyang, Guizhou, 550025, China.
- Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, Guiyang, Guizhou, 550025, China.
| | - Xisong Mao
- Department of Metallurgical Engineering, College of Materials and Metallurgy, Guizhou University, Huaxi, Guiyang, Guizhou, 550025, China
- Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, Guiyang, Guizhou, 550025, China
| | - Zhiyao Chu
- Department of Metallurgical Engineering, College of Materials and Metallurgy, Guizhou University, Huaxi, Guiyang, Guizhou, 550025, China
- Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, Guiyang, Guizhou, 550025, China
| | - Deyang Ning
- Department of Metallurgical Engineering, College of Materials and Metallurgy, Guizhou University, Huaxi, Guiyang, Guizhou, 550025, China
- Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, Guiyang, Guizhou, 550025, China
| | - Junshan Zhang
- Department of Metallurgical Engineering, College of Materials and Metallurgy, Guizhou University, Huaxi, Guiyang, Guizhou, 550025, China
- Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, Guiyang, Guizhou, 550025, China
| | - Fengyuan Liu
- Department of Metallurgical Engineering, College of Materials and Metallurgy, Guizhou University, Huaxi, Guiyang, Guizhou, 550025, China
- Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, Guiyang, Guizhou, 550025, China
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11
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Di S, Wang J, Zhai Y, Chen P, Ning T, Shi C, Yang H, Bao Y, Gao Q, Zhu S. Efficient activation of peroxymonosulfate mediated by Co(II)-CeO 2 as a novel heterogeneous catalyst for the degradation of refractory organic contaminants: Degradation pathway, mechanism and toxicity assessment. J Hazard Mater 2022; 435:129013. [PMID: 35523092 DOI: 10.1016/j.jhazmat.2022.129013] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 04/05/2022] [Accepted: 04/23/2022] [Indexed: 06/14/2023]
Abstract
A series of Co(II)-CeO2 mixed metal oxides were synthesized by a facile hydrothermal-calcination procedure for activating peroxymonosulfate (PMS) and degrading toxic and difficult biodegradable organics. Co(II)-CeO2 showed excellent degradation performance toward rhodamine B (RhB), toluidine blue, methylene blue and diclofenac. RhB is a refractory organic contaminant, and ecotoxicological evaluation unraveled its harmfulness to the biosphere. RhB was selected as the model pollutant to investigate catalytic mechanisms. Parameters affecting degradation performance were profoundly investigated, including Co:Ce feed ratio, initial pH, PMS dosage, catalyst dosage, RhB concentration, coexisting ions and reaction temperature. Reaction mechanisms were proposed based on density functional theory calculations and identifications of reactive oxygen species. Improvements have been achieved in seven aspects compared to previous studies, including 100% degradation ratio in both real water samples and each reuse of the catalyst, ultrafast degradation rate, cost-effectiveness of the catalyst, toxicity-attenuation provided by the developed degradation method, high degree of mineralization for the model pollutant, negligible leaching of active sites, and the enhancement of catalytic performance by utilizing trace leached cobalt, endowing the technique with broad applicability and prospect.
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Affiliation(s)
- Siyuan Di
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China
| | - Jiahao Wang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Yixin Zhai
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China
| | - Pin Chen
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China
| | - Tao Ning
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Chunxiang Shi
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China
| | - Hucheng Yang
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China
| | - Yue Bao
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China
| | - Qiang Gao
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Shukui Zhu
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China.
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Zhang Q, Nie W, Hou T, Shen H, Li Q, Guan C, Duan L, Zhao X. Optical and Photocatalytic Properties of Br-Doped BiOCl Nanosheets with Rich Oxygen Vacancies and Dominating {001} Facets. Nanomaterials 2022; 12:nano12142423. [PMID: 35889647 PMCID: PMC9318533 DOI: 10.3390/nano12142423] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 07/09/2022] [Accepted: 07/12/2022] [Indexed: 01/27/2023]
Abstract
Crystal facet engineering and nonmetal doping are regarded as effective strategies for improving the separation of charge carriers and photocatalytic activity of semiconductor photocatalysts. In this paper, we developed a facial method for fabricating oxygen-deficient Br-doped BiOCl nanosheets with dominating {001} facets through a traditional hydrothermal reaction and explored the impact of the Br doping and specific facets on carrier separation and photocatalytic performance. The morphologies, structures, and optical and photocatalytic properties of the obtained products were characterized systematically. The BiOCl samples prepared by the hydrothermal reaction exhibited square-like shapes with dominating {001} facets. Photodeposition results indicated that photoinduced electrons preferred to transfer to {001} facets because of the strong internal static electric fields in BiOCl nanosheets with dominating {001} facets. Br doping not only contributed to the formation of impurity energy levels that could promote light absorption but introduced a large number of surface oxygen vacancies (VO) in BiOCl photocatalysts, which was beneficial for photocatalytic performance. Moreover, the photocatalytic activities of these products under visible light were tested by degradation of rhodamine B (RhB). Because of the synergistic effect of the dominating {001} facets, Br doping, and rich VO, oxygen-deficient Br-doped BiOCl nanosheets exhibited improved carrier separation, visible light absorption, and photocatalytic efficiency.
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Affiliation(s)
- Qian Zhang
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, Northwestern Polytechnical University, Xi’an 710072, China; (Q.Z.); (W.N.); (T.H.); (Q.L.); (C.G.); (L.D.)
- Shaanxi Key Laboratory of Condensed Matter Structures and Properties, Northwestern Polytechnical University, Xi’an 710072, China
- Department of Applied Physics, School of Physical Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China
| | - Wuyang Nie
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, Northwestern Polytechnical University, Xi’an 710072, China; (Q.Z.); (W.N.); (T.H.); (Q.L.); (C.G.); (L.D.)
- Shaanxi Key Laboratory of Condensed Matter Structures and Properties, Northwestern Polytechnical University, Xi’an 710072, China
- Department of Applied Physics, School of Physical Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China
| | - Tian Hou
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, Northwestern Polytechnical University, Xi’an 710072, China; (Q.Z.); (W.N.); (T.H.); (Q.L.); (C.G.); (L.D.)
- Shaanxi Key Laboratory of Condensed Matter Structures and Properties, Northwestern Polytechnical University, Xi’an 710072, China
- Department of Applied Physics, School of Physical Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China
| | - Hao Shen
- Department of Applied Physics, Chang’an University, Xi’an 710064, China;
| | - Qiang Li
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, Northwestern Polytechnical University, Xi’an 710072, China; (Q.Z.); (W.N.); (T.H.); (Q.L.); (C.G.); (L.D.)
- Shaanxi Key Laboratory of Condensed Matter Structures and Properties, Northwestern Polytechnical University, Xi’an 710072, China
- Department of Applied Physics, School of Physical Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China
| | - Chongshang Guan
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, Northwestern Polytechnical University, Xi’an 710072, China; (Q.Z.); (W.N.); (T.H.); (Q.L.); (C.G.); (L.D.)
- Shaanxi Key Laboratory of Condensed Matter Structures and Properties, Northwestern Polytechnical University, Xi’an 710072, China
- Department of Applied Physics, School of Physical Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China
| | - Libing Duan
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, Northwestern Polytechnical University, Xi’an 710072, China; (Q.Z.); (W.N.); (T.H.); (Q.L.); (C.G.); (L.D.)
- Shaanxi Key Laboratory of Condensed Matter Structures and Properties, Northwestern Polytechnical University, Xi’an 710072, China
- Department of Applied Physics, School of Physical Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China
| | - Xiaoru Zhao
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, Northwestern Polytechnical University, Xi’an 710072, China; (Q.Z.); (W.N.); (T.H.); (Q.L.); (C.G.); (L.D.)
- Shaanxi Key Laboratory of Condensed Matter Structures and Properties, Northwestern Polytechnical University, Xi’an 710072, China
- Department of Applied Physics, School of Physical Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China
- Correspondence:
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Cáceres-Hernández A, Torres-Torres JG, Silahua-Pavón A, Godavarthi S, García-Zaleta D, Saavedra-Díaz RO, Tavares-Figueiredo R, Cervantes-Uribe A. Facile Synthesis of ZnO-CeO 2 Heterojunction by Mixture Design and Its Application in Triclosan Degradation: Effect of Urea. Nanomaterials (Basel) 2022; 12:nano12121969. [PMID: 35745314 PMCID: PMC9230812 DOI: 10.3390/nano12121969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 05/31/2022] [Accepted: 06/06/2022] [Indexed: 11/19/2022]
Abstract
In this study, simplex centroid mixture design was employed to determine the effect of urea on ZnO-CeO. The heterojunction materials were synthesized using a solid-state combustion method, and the physicochemical properties were evaluated using X-ray diffraction, nitrogen adsorption/desorption, and UV–Vis spectroscopy. Photocatalytic activity was determined by a triclosan degradation reaction under UV irradiation. According to the results, the crystal size of zinc oxide decreases in the presence of urea, whereas a reverse effect was observed for cerium oxide. A similar trend was observed for ternary samples, i.e., the higher the proportion of urea, the larger the crystallite cerium size. In brief, urea facilitated the co-existence of crystallites of CeO and ZnO. On the other hand, UV spectra indicate that urea shifts the absorption edge to a longer wavelength. Studies of the photocatalytic activity of TCS degradation show that the increase in the proportion of urea favorably influenced the percentage of mineralization.
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Affiliation(s)
- Antonia Cáceres-Hernández
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB, Universidad Juárez Autónoma de Tabasco, Km.1 carretera Cunduacán-Jalpa de Méndez, C.P. Cunduacán 86690, TB, Mexico; (A.C.-H.); (J.G.T.-T.); (A.S.-P.); (R.O.S.-D.)
| | - Jose Gilberto Torres-Torres
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB, Universidad Juárez Autónoma de Tabasco, Km.1 carretera Cunduacán-Jalpa de Méndez, C.P. Cunduacán 86690, TB, Mexico; (A.C.-H.); (J.G.T.-T.); (A.S.-P.); (R.O.S.-D.)
| | - Adib Silahua-Pavón
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB, Universidad Juárez Autónoma de Tabasco, Km.1 carretera Cunduacán-Jalpa de Méndez, C.P. Cunduacán 86690, TB, Mexico; (A.C.-H.); (J.G.T.-T.); (A.S.-P.); (R.O.S.-D.)
| | - Srinivas Godavarthi
- Investigadoras e Investigadores por México—División Académica de Ciencias Básicas, Universidad Juárez Autónoma de Tabasco, Villahermosa 86690, TB, Mexico;
| | - David García-Zaleta
- División Académica Multidisciplinaria de Jalpa de Méndez, Carretera Cunduacán–Jalpa de Méndez, Universidad Juárez Autónoma de Tabasco, km 1, Col. La Esmeralda, Villahermosa 86690, TB, Mexico;
| | - Rafael Omar Saavedra-Díaz
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB, Universidad Juárez Autónoma de Tabasco, Km.1 carretera Cunduacán-Jalpa de Méndez, C.P. Cunduacán 86690, TB, Mexico; (A.C.-H.); (J.G.T.-T.); (A.S.-P.); (R.O.S.-D.)
| | | | - Adrián Cervantes-Uribe
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB, Universidad Juárez Autónoma de Tabasco, Km.1 carretera Cunduacán-Jalpa de Méndez, C.P. Cunduacán 86690, TB, Mexico; (A.C.-H.); (J.G.T.-T.); (A.S.-P.); (R.O.S.-D.)
- Correspondence: ; Tel.: +52-553-143-9893
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Gao Y, Wang X, Zhang Y, Li J, Zhang H, Li J. Novel fabrication of bi-metal oxide hybrid nanocomposites for synergetic enhancement of in vivo healing and wound care after caesarean section surgery. Int Wound J 2022; 19:1705-1716. [PMID: 35243768 PMCID: PMC9615299 DOI: 10.1111/iwj.13771] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Revised: 01/08/2022] [Accepted: 01/13/2022] [Indexed: 01/29/2023] Open
Abstract
In the current study, bi‐metal oxide hybrid nanocomposites prepared by cerium oxide (CeO2) nanoparticles are included into chitosan‐ZnO composites for developing the potential materials of dressing the wound. The wound healing effect of prepared hybrid nanocomposites was evaluated regarding the surface morphology, functional groups, thermal degradation and composite size. The antimicrobial activity of chitosan‐ZnO/CeO2 hybrid nano composites was tested against the pathogens of Staphylococcus aureus and Escherichia coli. The hybrid nanocomposites containing CeO2‐based chitosan and ZnO nanoparticles were taken for optimum dressing included in the vivo studies on the excisional wounds in wistar rats. After 2 weeks, it is seen that the wound treated with CS‐ZnO/CeO2 hybrid nano composites consists of the significant dressing of nearly 100% compared with control which showed nearly 65% of wound closure. Finally, our reported results gave the proof in supporting the availability of CS‐ZnO/CeO2 hybrid nanocomposites contains the dressing of the wounds for the treatment.
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Affiliation(s)
- Yan Gao
- Nursing Department, The Second Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi, China
| | - Xiaorui Wang
- Department of Stomatology, The No. 986 Hospital of the Air Force PLA, Xi'an, Shaanxi, China
| | - Yongai Zhang
- College of Nursing, Xi'an Medical University, Xi'an, Shaanxi, China
| | - Jing Li
- College of Nursing, Xi'an Medical University, Xi'an, Shaanxi, China
| | - Haimiao Zhang
- College of Nursing, Xi'an Medical University, Xi'an, Shaanxi, China
| | - Jinlian Li
- Department of Gastroenterology, The Second Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi, China
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15
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Aslam M, Qamar MT, Soomro MT, Danish EY, Ismail IMI, Hameed A. The role of size-controlled CeO 2 nanoparticles in enhancing the stability and photocatalytic performance of ZnO in natural sunlight exposure. Chemosphere 2022; 289:133092. [PMID: 34856239 DOI: 10.1016/j.chemosphere.2021.133092] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 11/22/2021] [Accepted: 11/25/2021] [Indexed: 06/13/2023]
Abstract
In order to enhance the photocatalytic performance and stability, the various proportions of the size controlled cerium oxide (CeO2) nanoparticles were dispersed at the pre-synthesized ZnO. Although, the expected dual absorption onsets, probably due to the diminutive difference between the bandgaps of CeO2 (∼2.9 eV) and ZnO (∼3.1 eV), were not observed however, a blue shift in the bandgap energy of ZnO was witnessed with the increasing surface density of CeO2 particles. The delayed excitons recombination process with the increasing concentration of CeO2 nanoparticles was verified by the PL spectra. The structural investigation by Raman and XRD analysis revealed the surface attachment of CeO2 particles without altering the rock-salt lattice of ZnO. The morphological and fine microstructural analysis established the uniform distribution of evenly sized CeO2 particles at the surface of ZnO with the discrete fringe patterns of both the entities whereas the XPS analysis confirmed the majority of Ce4+ in dispersed CeO2. In comparison to pure ZnO, cyclic voltammetric (CV) analysis, under illumination, exposed the supportive role of surface residing CeO2 particles in eradicating the photo-corrosion of ZnO whereas the chronopotentiometry (CP) predicted the prolonged life-span of the excitons. Compared to pure ZnO, an appreciably high activity was revealed for 10% CeO2 loading as compared to pure ZnO for the removal of mono and di-nitrophenol derivatives and their mixtures under natural sunlight exposure. The variations in the removal rates in the mixture as compared to individual nitrophenol exposed the structure-based priority of ROS for the respective phenol. The significantly enhanced photocatalytic activity of the composite catalysts revealed the incremental role of surface-mounted CeO2 entities in boosting the generation of ROS under sunlight irradiation. The experimental observations were correlated and compiled to establish the mechanism of the removal process.
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Affiliation(s)
- Mohammad Aslam
- Centre of Excellence in Environmental Studies (CEES), King Abdulaziz University, Jeddah, 21589, Saudi Arabia.
| | - Muhammad Tariq Qamar
- Department of Chemistry, Forman Christian College (A Chartered University), Ferozepur Road, Lahore, 54600, Pakistan
| | - Muhammad Tahir Soomro
- Centre of Excellence in Environmental Studies (CEES), King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Ekram Y Danish
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Saudi Arabia
| | - Iqbal M I Ismail
- Centre of Excellence in Environmental Studies (CEES), King Abdulaziz University, Jeddah, 21589, Saudi Arabia; Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Saudi Arabia
| | - Abdul Hameed
- Centre of Excellence in Environmental Studies (CEES), King Abdulaziz University, Jeddah, 21589, Saudi Arabia; National Centre for Physics, Quaid-e-Azam University, Islamabad, 44000, Pakistan.
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Huang H, Li YX, Jiang GJ, Wang HL, Jiang WF. In Situ Construction of Dye-Sensitized BiOCl/Rutile-TiO 2 Nanorod Heterojunctions with Highly Enhanced Photocatalytic Activity for Treating Persistent Organic Pollutants. Inorg Chem 2021; 60:17325-17338. [PMID: 34702028 DOI: 10.1021/acs.inorgchem.1c02712] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The construction of efficient and stable heterojunction photocatalysts with a controllable close contact interface and visible-light response is a challenging research topic in the field of photocatalysis. Herein, a series of BiOCl/rutile-TiO2 (R-TiO2) nanorod heterojunctions were constructed using R-TiO2 nanorods as supporting frameworks followed by selective adsorption of Cl- on R-TiO2(110) facets and in situ growth of BiOCl on the surface of TiO2 nanorods. The strong affinity of rhodamine B (RhB) as a photosensitizer for BiOCl allowed the prepared BiOCl/R-TiO2 heterojunctions to work efficiently under visible-light irradiation. The dye-sensitized BiOCl/R-TiO2 nanorod heterojunctions displayed promising photocatalytic performance for simultaneously treating RhB and the persistent organic pollutant 2-sec-butyl-4,6-dinitrophenol (DNBP). The highly enhanced photodegradation activity of the BiOCl/R-TiO2 system was mainly attributed to the efficient RhB-photosensitization effect, the enhanced heterojunction effect, and the suitable conduction band match between BiOCl and R-TiO2, which facilitated electron transfer from the excited RhB to the catalyst surface and charge separation across the BiOCl/R-TiO2 interface, thus promoting the formation of •O2- and h+ as dominant active species in the reaction system for degradation of pollutants. The results demonstrate that the construction of a dye-sensitized BiOCl/R-TiO2 heterojunction system is an effective strategy for improving the photocatalytic potential.
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Affiliation(s)
- Hao Huang
- Department of Chemistry, Dalian University of Technology, Dalian 116023, China
| | - Yu-Xuan Li
- Department of Chemistry, Dalian University of Technology, Dalian 116023, China
| | - Guo-Jing Jiang
- Department of Chemistry, Dalian University of Technology, Dalian 116023, China
| | - Hui-Long Wang
- Department of Chemistry, Dalian University of Technology, Dalian 116023, China
| | - Wen-Feng Jiang
- Department of Chemistry, Dalian University of Technology, Dalian 116023, China
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17
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Palai A, Panda NR, Sahu D. Novel ZnO blended SnO2 nanocatalysts exhibiting superior degradation of hazardous pollutants and enhanced visible photoemission properties. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.131245] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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18
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Ahmad AA, Al-Bataineh QM, Alsaad AM, Al-Nawafleh DM, Al-Nawafleh AM, Telfah AD. Synthesis and Characterization of Thin Films Based on Azobenzene Derivative Anchored to CeO 2 Nanoparticle for Photoswitching Applications. Photochem Photobiol 2021; 98:823-830. [PMID: 34612527 DOI: 10.1111/php.13534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 09/29/2021] [Indexed: 11/29/2022]
Abstract
Azobenzene has attracted substantial attention as a photoswitchable molecule since its applications range from energy and data storage to biomedical applications. This work reports a new type of thin-film based on azobenzene derivative anchored to cerium oxide nanoparticles CeO2 NPs for photoswitching applications. The trans-cis isomerization and reverse isomerization occur by UV-light exposure and thermal relaxation process, respectively. The photoisomerization and reverse isomerization kinetics for CeO2 NPs-MR thin films are studied, investigated, and analyzed using UV-Vis absorbance spectra, FTIR spectroscopy, XRD, and scanning electron microscopy (SEM), in addition to differential scanning calorimetry (DSC) measurement to study the energy storage capacity. The results found that anchoring azobenzene to CeO2 NPs is successful in multisource storage of solar energy applications.
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Affiliation(s)
- Ahmad A Ahmad
- Department of Physics, Jordan University of Science & Technology, Irbid, Jordan
| | - Qais M Al-Bataineh
- Department of Physics, Jordan University of Science & Technology, Irbid, Jordan.,Leibniz Institut für Analytische Wissenschaften-ISAS-e.V., Dortmund, Germany
| | - Ahmad M Alsaad
- Department of Physics, Jordan University of Science & Technology, Irbid, Jordan
| | - Dima M Al-Nawafleh
- Department of Physics, Jordan University of Science & Technology, Irbid, Jordan
| | - Areej M Al-Nawafleh
- Department of Physics, Jordan University of Science & Technology, Irbid, Jordan
| | - Ahmad D Telfah
- Leibniz Institut für Analytische Wissenschaften-ISAS-e.V., Dortmund, Germany.,Hamdi Mango Center for Scientific Research (HMCSR), the Jordan University, Amman, Jordan
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Zimou J, Nouneh K, Talbi A, Gana L, El-Habib A, Hsissou R, Addou M. Influence of manganese rate on structural, optical and electrochemical properties of CeO2 thin films deposited by spray pyrolysis: Supercapacitor applications. J RARE EARTH 2021. [DOI: 10.1016/j.jre.2021.09.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Onwudiwe DC, Oyewo OA, Ogunjinmi OE, Ojelere O. Hexavalent chromium reduction by ZnO, SnO2 and ZnO-SnO2 synthesized using biosurfactants from extract of Solanum macrocarpon. South African Journal of Chemical Engineering 2021; 38:21-33. [DOI: 10.1016/j.sajce.2021.07.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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Ma M, Liu Y, Wei Y, Hao D, Wei W, Ni BJ. A facile oxygen vacancy and bandgap control of Bi(OH)SO 4·H 2O for achieving enhanced photocatalytic remediation. J Environ Manage 2021; 294:113046. [PMID: 34130139 DOI: 10.1016/j.jenvman.2021.113046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 04/28/2021] [Accepted: 05/25/2021] [Indexed: 06/12/2023]
Abstract
The development of highly efficient photocatalysts is crucial for the remediation of organic pollutants. Herein, we reported a facile synthesis of oxygen vacancy rich Bi(OH)SO4·H2O photocatalyst by the control of precursor. The samples were characterized by XRD, scanning electron microscope, electron paramagnetic resonance, X-ray photoelectron spectroscopy etc. With more oxygen vacancies introduced, the photocatalytic activity on the degradation of RhB and tetracycline was significantly boosted. Density functional theory calculation was used to further reveal the influence of oxygen vacancy on the band structure of Bi(OH)SO4·H2O. The results and finding of this work are helpful for the development of sustainable environmental protection.
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Affiliation(s)
- Mingguang Ma
- Provincial Key Laboratory of Gansu Higher Education for City Environmental Control, College of Chemistry and Chemical Engineering, Lanzhou City University, Lanzhou, Gansu, 730070, PR China
| | - Yang Liu
- School of Materials Science and Engineering, Henan Normal University, Xinxiang, Henan, 453007, PR China
| | - Yunxia Wei
- Provincial Key Laboratory of Gansu Higher Education for City Environmental Control, College of Chemistry and Chemical Engineering, Lanzhou City University, Lanzhou, Gansu, 730070, PR China
| | - Derek Hao
- Centre for Technology in Water and Wastewater (CTWW), School of Civil and Environmental Engineering, University of Technology Sydney (UTS), Ultimo, NSW, 2007, Australia.
| | - Wei Wei
- Centre for Technology in Water and Wastewater (CTWW), School of Civil and Environmental Engineering, University of Technology Sydney (UTS), Ultimo, NSW, 2007, Australia
| | - Bing-Jie Ni
- Centre for Technology in Water and Wastewater (CTWW), School of Civil and Environmental Engineering, University of Technology Sydney (UTS), Ultimo, NSW, 2007, Australia.
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Raja A, Son N, Kang M. Construction of visible-light driven Bi 2MoO 6-rGO-TiO 2 photocatalyst for effective ofloxacin degradation. Environ Res 2021; 199:111261. [PMID: 34015293 DOI: 10.1016/j.envres.2021.111261] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 04/19/2021] [Accepted: 04/24/2021] [Indexed: 06/12/2023]
Abstract
Photocatalytic removal is more appropriate for the destruction of organic contaminants. The ternary Bi2MoO6-reduced graphene oxide (rGO)-TiO2 catalyst was synthesized using a simple hydrothermal method, and various surface analytical optical techniques were analyzed. The photocatalytic decomposition efficiency of the Bi2MoO6-rGO-TiO2 composite was 92.3% higher than those of pure and binary photocatalysts. The effects of operational parameters, such as catalyst ratio, catalyst variation, rGO ratio variation, and pH value variation were also analyzed. The as-prepared ternary photocatalyst exhibited low photoluminescence and high photocurrent density, which suppressed photon-induced electron and hole (h+) recombination and effective charge separation. The study demonstrated that rGO has excellent electron transfer performance and enhanced photocatalytic reaction stability. The perfect cycling stability of Bi2MoO6-rGO-TiO2 was retained even after five consecutive cycles on the photocatalytic degradation reaction performance. In this study, we propose a decomposition performance mechanism for ofloxacin degradation that underwent visible-light irradiation.
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Affiliation(s)
- Annamalai Raja
- Department of Chemistry, College of Natural Sciences, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea.
| | - Namgyu Son
- Department of Chemistry, College of Natural Sciences, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea
| | - Misook Kang
- Department of Chemistry, College of Natural Sciences, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea.
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Celebi N, Salimi K. Yolk-shell ZnO@C-CeO 2 ternary heterostructures with conductive N-doped carbon mediated electron transfer for highly efficient water splitting. J Colloid Interface Sci 2021; 605:23-32. [PMID: 34311312 DOI: 10.1016/j.jcis.2021.07.052] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 07/05/2021] [Accepted: 07/09/2021] [Indexed: 12/15/2022]
Abstract
Herein, carbon-incorporated yolk-shell ZnO@C-CeO2 ternary heterostructures are employed as visible light responsive photocatalyst for highly efficient photoelectrochemical (PEC) water splitting. Compared to conventional ZnO/CeO2 semiconductors, introduction of a thin PDA shell layer assures the generation of a conductive N-doped graphitic carbon layer after a calcination post-treatment with mesoporous hollow morphologies. The evaluation of PEC water splitting performance of ZnO@C-CeO2 photoanodes reveals the maximum photocurrent density as 7.43 mA/cm2 at 1.18 V RHE under light whereas almost no response is recorded at dark. These superior PEC H2 evolution performance strongly implies efficient charge separation, facilitated charge transfer between photoanode and electrolyte interface as well as within the semiconductor bulk by means of rapid electron transfer ability of N-doped graphitic carbon layer and prolong life time of light inside yolk-shell structure. Furthermore, considerable depression in PL intensity of ZnO@C-CeO2 photoanodes compared to ZnO clearly reveals a higher photon absorption due to the reflection of light in hollow region and increase in electron hole separation efficiency. Moreover, plausible Z-scheme charge transfer mechanism using ZnO@C-CeO2 photoanodes under visible light illumination is verified using radical trapping experiments and X-ray photoelectron spectroscopy (XPS) methods, suggesting new generation of heterostructures for sufficient conversion of sunlight to H2 fuels.
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Affiliation(s)
- Nuray Celebi
- Ankara Yildirim Beyazit University, Faculty of Engineering and Natural Sciences, Department of Energy Systems Engineering, Ankara, Turkey
| | - Kouroush Salimi
- Ankara Yildirim Beyazit University, Faculty of Engineering and Natural Sciences, Department of Chemical Engineering, Ankara, Turkey.
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Gao Q, Cui Y, Wang S, Liu B, Liu C. Efficient activation of peroxymonosulfate by Co-doped mesoporous CeO 2 nanorods as a heterogeneous catalyst for phenol oxidation. Environ Sci Pollut Res Int 2021; 28:27852-27863. [PMID: 33517528 DOI: 10.1007/s11356-021-12605-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 01/18/2021] [Indexed: 06/12/2023]
Abstract
Sulfate radical-based advanced oxidation processes have received considerable attentions in the remediation of organic pollutants due to their high oxidation ability. In this study, a novel Co3O4/CeO2 catalyst was fabricated and employed as a peroxymonosulfate (PMS) activator to generate SO4•- for phenol degradation. The Co3O4/CeO2 catalyst exhibited a good catalytic performance at a wide pH range of 3.4 to 10.8, and 100% phenol (20 mg/L) was removed within 50-min reaction under optimal conditions with 0.2 g/L catalyst and 2.0 g/L PMS at room temperature. The transformation products and total organic carbon during the degradation process were also determined. The quenching experiments and electron paramagnetic resonance spectra revealed that sulfate radical (SO4•-) rather than other species such as singlet oxygen (1O2) and hydroxyl radical (•OH) was primarily responsible for phenol degradation in the Co3O4/CeO2/PMS system, and a rational mechanism was proposed. Moreover, the recycling experiments as well as low cobalt leaching concentration manifested satisfactory reusability and stability. The effects of various inorganic anions and natural organic matter in real water matrix on phenol oxidation were further evaluated. We believe that the Co3O4/CeO2 composites have promising applications of PMS activation for the degradation of organic pollutants in wastewater treatment.
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Affiliation(s)
- Qiang Gao
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, 266580, People's Republic of China
- School of Chemistry and Chemical Engineering, Qinghai Normal University, Xining, 810008, People's Republic of China
| | - Yuchen Cui
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, 266580, People's Republic of China
| | - Shuaijun Wang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, 266580, People's Republic of China
| | - Bin Liu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, 266580, People's Republic of China.
| | - Chenguang Liu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, 266580, People's Republic of China.
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Lan Y, Xia X, Li J, Mao X, Chen C, Ning D, Chu Z, Zhang J, Liu F. Insight into the Contributions of Surface Oxygen Vacancies on the Promoted Photocatalytic Property of Nanoceria. Nanomaterials (Basel) 2021; 11:nano11051168. [PMID: 33946983 PMCID: PMC8145243 DOI: 10.3390/nano11051168] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Revised: 04/21/2021] [Accepted: 04/27/2021] [Indexed: 12/02/2022]
Abstract
Oxygen vacancies (OVs) have critical effects on the photoelectric characterizations and photocatalytic activity of nanoceria, but the contributions of surface OVs on the promoted photocatalytic properties are not clear yet. In this work, we synthesized ceria nanopolyhedron (P-CeO2), ceria nanocube (C-CeO2) and ceria nanorod (R-CeO2), respectively, and annealed them at 600 °C in air, 30%, 60% or pure H2. After annealing, the surface OVs concentration of ceria elevates with the rising of H2 concentration. Photocatalytic activity of annealed ceria is promoted with the increasing of surface OVs, the methylene blue photodegradation ratio with pure hydrogen annealed of P-CeO2, C-CeO2 or R-CeO2 is 93.82%, 85.15% and 90.09%, respectively. Band gap of annealed ceria expands first and then tends to narrow slightly with the rising of surface OVs, while the valence band (VB) and conductive band (CB) of annealed ceria changed slightly. Both of photoluminescence spectra and photocurrent results indicate that the separation efficiency of photoinduced electron-hole pairs is significantly enhanced with the increasing of the surface OVs concentration. The notable weakened recombination of photogenerated carrier is suggested to attribute a momentous contribution on the enhanced photocatalytic activity of ceria which contains surface OVs.
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Affiliation(s)
- Yuanpei Lan
- Department of Metallurgical Engineering, College of Materials and Metallurgy, Guizhou University, Huaxi, Guiyang 550025, China; (Y.L.); (X.X.); (X.M.); (D.N.); (Z.C.); (J.Z.); (F.L.)
- Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, Guiyang 550025, China
| | - Xuewen Xia
- Department of Metallurgical Engineering, College of Materials and Metallurgy, Guizhou University, Huaxi, Guiyang 550025, China; (Y.L.); (X.X.); (X.M.); (D.N.); (Z.C.); (J.Z.); (F.L.)
- Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, Guiyang 550025, China
| | - Junqi Li
- Department of Metallurgical Engineering, College of Materials and Metallurgy, Guizhou University, Huaxi, Guiyang 550025, China; (Y.L.); (X.X.); (X.M.); (D.N.); (Z.C.); (J.Z.); (F.L.)
- Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, Guiyang 550025, China
- Correspondence: (J.L.); (C.C.); Tel.: +86-13594152275 (J.L.); +86-15086015817 (C.C.)
| | - Xisong Mao
- Department of Metallurgical Engineering, College of Materials and Metallurgy, Guizhou University, Huaxi, Guiyang 550025, China; (Y.L.); (X.X.); (X.M.); (D.N.); (Z.C.); (J.Z.); (F.L.)
- Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, Guiyang 550025, China
| | - Chaoyi Chen
- Department of Metallurgical Engineering, College of Materials and Metallurgy, Guizhou University, Huaxi, Guiyang 550025, China; (Y.L.); (X.X.); (X.M.); (D.N.); (Z.C.); (J.Z.); (F.L.)
- Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, Guiyang 550025, China
- Correspondence: (J.L.); (C.C.); Tel.: +86-13594152275 (J.L.); +86-15086015817 (C.C.)
| | - Deyang Ning
- Department of Metallurgical Engineering, College of Materials and Metallurgy, Guizhou University, Huaxi, Guiyang 550025, China; (Y.L.); (X.X.); (X.M.); (D.N.); (Z.C.); (J.Z.); (F.L.)
- Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, Guiyang 550025, China
| | - Zhiyao Chu
- Department of Metallurgical Engineering, College of Materials and Metallurgy, Guizhou University, Huaxi, Guiyang 550025, China; (Y.L.); (X.X.); (X.M.); (D.N.); (Z.C.); (J.Z.); (F.L.)
- Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, Guiyang 550025, China
| | - Junshan Zhang
- Department of Metallurgical Engineering, College of Materials and Metallurgy, Guizhou University, Huaxi, Guiyang 550025, China; (Y.L.); (X.X.); (X.M.); (D.N.); (Z.C.); (J.Z.); (F.L.)
- Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, Guiyang 550025, China
| | - Fengyuan Liu
- Department of Metallurgical Engineering, College of Materials and Metallurgy, Guizhou University, Huaxi, Guiyang 550025, China; (Y.L.); (X.X.); (X.M.); (D.N.); (Z.C.); (J.Z.); (F.L.)
- Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, Guiyang 550025, China
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Yang C, Zhang G, Meng Y, Pan G, Ni Z, Xia S. Direct Z-scheme CeO 2@LDH core-shell heterostructure for photodegradation of Rhodamine B by synergistic persulfate activation. J Hazard Mater 2021; 408:124908. [PMID: 33418524 DOI: 10.1016/j.jhazmat.2020.124908] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Revised: 12/16/2020] [Accepted: 12/17/2020] [Indexed: 06/12/2023]
Abstract
Photocatalytic activation of persulfate (PAPS) is considered an efficient and green approach for the mitigation of organic pollutants because of its advantages in low energy consumption and high reusability of photocatalysts. Herein, direct Z-scheme CeO2@LDH heterojunction photocatalyst with a core-shell structure is constructed. We reveal that CeO2@LDH exhibits excellent persulfate (PS) activation performance and high degradation efficiency of RhB under visible light irradiation. Control experiments by quenching catalytically active radicals and analysis of electron paramagnetic resonance (ESR) spectra suggest that the sulfate radical (SO4·-) generated by photocatalytic activation of PS, together with superoxide radical (·O2-) and hydroxyl radical (·OH), degrade pollutants synergistically. Density functional theory (DFT) calculations indicate that the built-in electric field across the surface of CeO2 and LDH is the intrinsic driving force for the efficient transfer of hot carriers in the Z-scheme heterojunction. The construction of this transfer path can effectively engineer the interfacial band structure and inhibit the recombination of photogenerated electron-hole pairs and promote their transportation. Meanwhile, electrons were found to accumulate at the conduction band (CB) of LDHs and holes populate at valence band (VB) of CeO2, generating more active species for photodegradation of RhB. We demonstrate that the Z-scheme heterojunction photocatalyst activated PS system (Z-scheme/PS) is a promising method to degrade RhB and potentially organic pollutants in general.
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Affiliation(s)
- Chao Yang
- Department of Chemistry & Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Guanhua Zhang
- Department of Chemistry, College of Chemical Engineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou 310014, PR China
| | - Yue Meng
- School of Life Science, Huzhou University, 759 East Erhuan Road, Huzhou 313000, PR China; Qiuzhen College, Huzhou University, Huzhou 313000, PR China.
| | - Guoxiang Pan
- School of Life Science, Huzhou University, 759 East Erhuan Road, Huzhou 313000, PR China.
| | - Zheming Ni
- Department of Chemistry, College of Chemical Engineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou 310014, PR China
| | - Shengjie Xia
- Department of Chemistry, College of Chemical Engineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou 310014, PR China.
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Raees A, Jamal MA, Ahmed I, Silanpaa M, Saad Algarni T. Synthesis and Characterization of CeO2/CuO Nanocomposites for Photocatalytic Degradation of Methylene Blue in Visible Light. Coatings 2021; 11:305. [DOI: 10.3390/coatings11030305] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Removal of hazardous organic dyes from polluted water bodies requires the introduction of strong adsorbents and photocatalysts to industrial wastewaters. Herein, photocatalytic CeO2 nanoparticles and CeO2/CuO nanocomposite were synthesized following a co-precipitation method for low cost elution of methylene blue (MB) from water. The crystallinity and surface structure of the as-prepared materials have been analyzed using characterization techniques including X-ray powder diffraction (XRPD), field emission scanning electron microscopy (FE-SEM), energy-dispersive spectroscopy (EDS), ultra-violet visible spectroscopy (UV–Vis), and Fourier-transform infrared spectroscopy (FTIR). The average particle size of both the nano scaled samples were approximately 20–30 nm. The photocatalytic properties of CeO2/CuO were investigated under visible light against methylene blue (MB). The results showed 91% photodegradation of MB organic pollutant in 3 h as monitored by UV–Vis spectroscopy. Absorbance peaks appeared at around 670 nm corresponding to degradation of MB. Such output displayed the effectiveness of Ce nanocomposites for environmental benefits. Hence, CeO2/CuO nanocomposite could be useful for treatment of industrial wastewaters by removing hazardous MB dye.
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Liu H, Zhao X, Shen H, Hao S, Jiang X. Enhanced photoluminescence and photocatalytic performance of a TiO2–ZnWO4 nanocomposite induced by oxygen vacancies. CrystEngComm 2021. [DOI: 10.1039/d0ce01500h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We reported the enhanced photoluminescence and photocatalytic performance of a TiO2–ZnWO4 nanocomposite and discussed the mechanism behind the superior behavior in this study.
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Affiliation(s)
- Hainan Liu
- Université Paris-Saclay
- CentraleSupélec
- CNRS
- Laboratoire SPMS
- Gif-sur-Yvette
| | - Xiaoru Zhao
- Key Laboratory of Space Applied Physics and Chemistry
- Ministry of Education of China
- School of Science
- Northwestern Polytechnical University
- Xi'an
| | - Hao Shen
- Department of Applied Physics
- Chang'an University
- Xi'an
- China
| | - Shenglan Hao
- Université Paris-Saclay
- CentraleSupélec
- CNRS
- Laboratoire SPMS
- Gif-sur-Yvette
| | - Xianwu Jiang
- Université Paris-Saclay
- CentraleSupélec
- CNRS
- Laboratoire SPMS
- Gif-sur-Yvette
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Murugalakshmi M, Jones BF, Mamba G, Maruthamani D, Muthuraj V. Unravelling the visible light-assisted catalytic prowess of an n–n type In2S3/CeO2 Z-scheme heterojunction towards organic and inorganic water pollution mitigation. NEW J CHEM 2021. [DOI: 10.1039/d0nj04844e] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The exploitation of visible light active photocatalysts for the removal of various pollutants has been given tremendous consideration in water and wastewater treatment.
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Affiliation(s)
- M. Murugalakshmi
- Department of Chemistry
- V. H. N. Senthikumara Nadar College (Autonomous)
- Virudhunagar 626 001
- India
- Department of Chemistry
| | - B. Filip Jones
- Department of Chemistry
- V. H. N. Senthikumara Nadar College (Autonomous)
- Virudhunagar 626 001
- India
| | - G. Mamba
- Institute for Nanotechnology and Water Sustainability Research
- College of Science, Engineering and Technology
- University of South Africa, Florida
- Johannesburg
- South Africa
| | - D. Maruthamani
- Department of Chemistry
- PSG College of Technology
- Coimbatore
- India
| | - V. Muthuraj
- Department of Chemistry
- V. H. N. Senthikumara Nadar College (Autonomous)
- Virudhunagar 626 001
- India
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Araujo FP, Trigueiro P, Honório LMC, Furtini MB, Oliveira DM, Almeida LC, Garcia RRP, Viana BC, Silva-Filho EC, Osajima JA. A novel green approach based on ZnO nanoparticles and polysaccharides for photocatalytic performance. Dalton Trans 2020; 49:16394-16403. [PMID: 32567613 DOI: 10.1039/d0dt01128b] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Novel green photocatalysts based on ZnO in the presence of arabic gum (AGZ) or karaya gum (KGZ) were synthesized by a sol-gel method for photocatalytic performance. The materials were characterized by XRD, FTIR spectroscopy, SEM, nitrogen adsorption/desorption, and PL and diffuse reflectance spectroscopy. Photocatalytic test was performed using methylene blue (MB) dye as the target pollutant under visible light. The reuse of photocatalysts and Artemia saline bioassays were investigated. The ZnO nanoparticles showed a hexagonal structure and the values of the band gaps were 2.95 (AGZ) and 2.98 eV (KGZ). The PL results demonstrated emission bands at 440, 473 or 478 and 549 nm. The textural properties indicated the presence of typically mesoporous materials. The MB discoloration efficiency was 81.5% and 91.0% for AGZ and KGZ, respectively. The photocatalytic activity of AGZ and KGZ was maintained after the third run. The ˙OH radicals are the main species involved in the MB discoloration. The MB discoloration from the photocatalysts showed no toxicity; therefore, they are considered to be promising materials for the degradation of the dye in the photocatalytic process.
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Affiliation(s)
- Francisca P Araujo
- LIMAV-Interdisciplinary Laboratory for Advanced Materials, Materials Science & Engineering graduate program, UFPI-Federal University of Piaui, 64049-550 Teresina, PI, Brazil.
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Naciri Y, Hsini A, Ajmal Z, Bouddouch A, Bakiz B, Navío J, Albourine A, Valmalette JC, Ezahri M, Benlhachemi A. Influence of Sr-doping on structural, optical and photocatalytic properties of synthesized Ca3(PO4)2. J Colloid Interface Sci 2020; 572:269-280. [DOI: 10.1016/j.jcis.2020.03.105] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 03/26/2020] [Accepted: 03/27/2020] [Indexed: 10/24/2022]
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32
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Ayodhya D, Veerabhadram G. Green synthesis of garlic extract stabilized Ag@CeO2 composites for photocatalytic and sonocatalytic degradation of mixed dyes and antimicrobial studies. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127611] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Uddin MT, Hoque ME, Chandra Bhoumick M. Facile one-pot synthesis of heterostructure SnO2/ZnO photocatalyst for enhanced photocatalytic degradation of organic dye. RSC Adv 2020; 10:23554-23565. [PMID: 35517351 PMCID: PMC9054812 DOI: 10.1039/d0ra03233f] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Accepted: 06/14/2020] [Indexed: 12/11/2022] Open
Abstract
In this work, heterostructure SnO2/ZnO nanocomposite photocatalyst was prepared by a straightforward one step polyol method.
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Affiliation(s)
- Md. Tamez Uddin
- Department of Chemical Engineering and Polymer Science
- Shahjalal University of Science and Technology
- Bangladesh
| | - Md. Enamul Hoque
- Department of Chemical Engineering and Polymer Science
- Shahjalal University of Science and Technology
- Bangladesh
| | - Mitun Chandra Bhoumick
- Department of Chemical Engineering and Polymer Science
- Shahjalal University of Science and Technology
- Bangladesh
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