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Bazazi S, Hosseini SP, Hashemi E, Rashidzadeh B, Liu Y, Saeb MR, Xiao H, Seidi F. Polysaccharide-based C-dots and polysaccharide/C-dot nanocomposites: fabrication strategies and applications. NANOSCALE 2023; 15:3630-3650. [PMID: 36728615 DOI: 10.1039/d2nr07065k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
C-dots are a new class of materials with vast applications. The synthesis of bio-based C-dots has attracted increasing attention in recent years. Polysaccharides being the most abundant natural materials with high biodegradability and no toxicity have been the focus of researchers for the synthesis of C-dots. C-dots obtained from polysaccharides are generally fabricated via thermal procedures, carbonization, and microwave pyrolysis. Small size, photo-induced electron transfer (PET), and highly adjustable luminosity behavior are the most important physical and chemical properties of C-dots. However, C-dot/polysaccharide composites can be introduced as a new generation of composites that combine the features of both C-dots and polysaccharides having a wide range of applications in biomedicines, biosensors, drug delivery systems, etc. This review demonstrates the features, raw materials, and methods used for the fabrication of C-dots derived from different polysaccharides. Furthermore, the properties, applications, and synthesis conditions of various C-dot/polysaccharide composites are discussed in detail.
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Affiliation(s)
- Sina Bazazi
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources and International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing 210037, China.
| | - Seyedeh Parisa Hosseini
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources and International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing 210037, China.
| | - Esmaeil Hashemi
- Department of Chemistry, Faculty of Science, University of Guilan, PO Box 41335-1914, Rasht, Iran
| | | | - Yuqian Liu
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources and International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing 210037, China.
| | - Mohammad Reza Saeb
- Department of Polymer Technology, Faculty of Chemistry, Gdańsk University of Technology, G. Narutowicza 11/12 80-233, Gdańsk, Poland
| | - Huining Xiao
- Department of Chemical Engineering, University of New Brunswick, Fredericton, New Brunswick, E3B 5A3 Canada.
| | - Farzad Seidi
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources and International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing 210037, China.
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Bishwakarma H, Tyagi R, Kumar N, Das AK. Green synthesis of flower shape ZnO-GO nanocomposite through optimized discharge parameter and its efficiency in energy storage device. ENVIRONMENTAL RESEARCH 2023; 218:115021. [PMID: 36495961 DOI: 10.1016/j.envres.2022.115021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 11/04/2022] [Accepted: 12/07/2022] [Indexed: 06/17/2023]
Abstract
Numerous solution-based methods are used to prepare zinc oxide (ZnO) and graphene oxide (GO) nanocomposite (ZnO-GO NCs) such as sol-gel, hydrothermal, and precipitation. These methods require lots of reagents and involve many stages. In this study, a novel one-step solution-based discharge method is used to prepare ZnO-GO NCs through an electrochemical discharge process (ECDP) without the use of any catalyst or toxic chemical reagent. This study focused on analyzing the effects of input parameters on the production rate of ZnO-GO NCs. The experiment was performed by using Taguchi L9 orthogonal array. Materials removal rate (MRR) is considered as output response. The results reveal that voltage is the most significant factor, followed by temperature and duty cycle for obtaining higher MRR. The optimum parameters obtained from the Minitab software for higher MRR are 40 V, 30%, and 45 °C. Further, the morphology of the nanoparticles (NCs) produced at optimum parameters is analyzed which shows flower shape NCs with multilayer graphene oxide, confirmed by the FESEM and TEM images. The XRD peak at 11.27° and Raman spectroscopy peak of G and D bands reveal GO formation. The prepared ZnO-GO NCs tested as supercapacitor activity in the KOH solution. At the optimum parameter, the specific capacitance is observed to be 523.4 F/g at 2A/g current density. The NCs electrode shows good cyclic stability, with 86% retention of specific capacitance after 5000 cycles. This study shows a promising future of converting the e-waste product into valuable nanomaterials such as GO and ZnO from used dry cell batteries.
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Affiliation(s)
- Harish Bishwakarma
- Department of Mechanical Engineering, Indian Institute of Technology (ISM) Dhanbad, 826004, India
| | - Rashi Tyagi
- University Center for Research and Development, Chandigarh University, Mohali, 140413, India.
| | - Nitesh Kumar
- Department of Mechanical Engineering, Indian Institute of Technology (ISM) Dhanbad, 826004, India
| | - Alok Kumar Das
- Department of Mechanical Engineering, Indian Institute of Technology (ISM) Dhanbad, 826004, India.
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Zulfa LL, Ediati R, Hidayat ARP, Subagyo R, Faaizatunnisa N, Kusumawati Y, Hartanto D, Widiastuti N, Utomo WP, Santoso M. Synergistic effect of modified pore and heterojunction of MOF-derived α-Fe 2O 3/ZnO for superior photocatalytic degradation of methylene blue. RSC Adv 2023; 13:3818-3834. [PMID: 36756550 PMCID: PMC9890639 DOI: 10.1039/d2ra07946a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 01/15/2023] [Indexed: 01/27/2023] Open
Abstract
Mesoporous heterojunction MOF-derived α-Fe2O3/ZnO composites were prepared by a simple calcination of α-Fe2O3/ZIF-8 as a sacrificial template. The optical properties confirm that coupling of both the modified pore and the n-n heterojunction effectively reduces the possibility of photoinduced charge carrier recombination under irradiation. The mesoporous Fe(25)ZnO with 25% loading of α-Fe2O3 exhibited the best performance in MB degradation, up to ∼100% after 150 minutes irradiation, higher than that of pristine ZnO and α-Fe2O3. Furthermore, after three cycles reusability, mesoporous Fe(25)ZnO still showed an excellent stability performance of up to 95.42% for degradation of MB. The proposed photocatalytic mechanism of mesoporous Fe(25)ZnO for the degradation of MB corresponds to the n-n heterojunction system. This study provides a valuable reference for preparing mesoporous MOF-derived metal oxides with an n-n heterojunction system to enhance MB photodegradation.
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Affiliation(s)
- Liyana Labiba Zulfa
- Department of Chemistry, Faculty of Science, Institut Teknologi Sepuluh Nopember Surabaya 60111 Indonesia
| | - Ratna Ediati
- Department of Chemistry, Faculty of Science, Institut Teknologi Sepuluh Nopember Surabaya 60111 Indonesia
| | | | - Riki Subagyo
- Department of Chemistry, Faculty of Science, Institut Teknologi Sepuluh Nopember Surabaya 60111 Indonesia
| | - Nuhaa Faaizatunnisa
- Department of Chemistry, Faculty of Science, Institut Teknologi Sepuluh Nopember Surabaya 60111 Indonesia
| | - Yuly Kusumawati
- Department of Chemistry, Faculty of Science, Institut Teknologi Sepuluh Nopember Surabaya 60111 Indonesia
| | - Djoko Hartanto
- Department of Chemistry, Faculty of Science, Institut Teknologi Sepuluh Nopember Surabaya 60111 Indonesia
| | - Nurul Widiastuti
- Department of Chemistry, Faculty of Science, Institut Teknologi Sepuluh Nopember Surabaya 60111 Indonesia
| | - Wahyu Prasetyo Utomo
- Department of Chemistry, Faculty of Science, Institut Teknologi Sepuluh Nopember Surabaya 60111 Indonesia .,School of Energy and Environment, City University of Hong Kong Hong Kong 999077 China
| | - Mardi Santoso
- Department of Chemistry, Faculty of Science, Institut Teknologi Sepuluh Nopember Surabaya 60111 Indonesia
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ZnO Nanostructures Doped with Various Chloride Ion Concentrations for Efficient Photocatalytic Degradation of Methylene Blue in Alkaline and Acidic Media. Molecules 2022; 27:molecules27248726. [PMID: 36557859 PMCID: PMC9781204 DOI: 10.3390/molecules27248726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 12/05/2022] [Accepted: 12/06/2022] [Indexed: 12/13/2022] Open
Abstract
In this study, chloride (Cl−) ions were successfully doped into ZnO nanostructures by the solvothermal method. The effect of various Cl− concentrations on the photocatalytic activity of ZnO towards the photodegradation of methylene blue (MB) under the illumination of ultraviolet light was studied. The as-prepared Cl−-doped ZnO nanostructures were analyzed in terms of morphology, structure, composition and optical properties. XRD data revealed an average crystallite size of 23 nm, and the XRD patterns were assigned to the wurtzite structure of ZnO even after doping with Cl−. Importantly, the optical band gap of various Cl ion-doped ZnO nanostructures was successively reduced from 3.42 to 3.16 eV. The photodegradation efficiency of various Cl− ion-doped ZnO nanostructures was studied for MB in aqueous solution, and the relative performance of each Cl ion-doped ZnO sample was as follows: 20% Cl−-doped ZnO > 15% Cl−-doped ZnO > 10% Cl−-doped ZnO > 5% Cl−-doped ZnO > pristine ZnO. Furthermore, the correlation of the pH of the MB solution and each Cl ion dopant concentration was also investigated. The combined results of varying dopant levels and the effect of the pH of the MB solution on the photodegradation process verified the crucial role of Cl− ions in activating the degradation kinetics of MB. Therefore, these newly developed photocatalysts could be considered as alternative materials for practical applications such as wastewater treatment.
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Kamarajan G, Anburaj DB, Porkalai V, Muthuvel A, Nedunchezhian G. Green synthesis of ZnO nanoparticles using Acalypha indica leaf extract and their photocatalyst degradation and antibacterial activity. J INDIAN CHEM SOC 2022. [DOI: 10.1016/j.jics.2022.100695] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Green inspired synthesis of ZnO nanoparticles and its characterizations with biofilm, antioxidant, anti-inflammatory, and anti-diabetic activities. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132420] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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7
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Chairungsri W, Subkomkaew A, Kijjanapanich P, Chimupala Y. Direct dye wastewater photocatalysis using immobilized titanium dioxide on fixed substrate. CHEMOSPHERE 2022; 286:131762. [PMID: 34375832 DOI: 10.1016/j.chemosphere.2021.131762] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 06/25/2021] [Accepted: 07/30/2021] [Indexed: 06/13/2023]
Abstract
Photocatalysis is a promising technology that can be applied to the dyeing of wastewater. During the process of photocatalysis, titanium dioxide (TiO2) is often used as a catalyst due to its low cost and broad availability. However, the use of TiO2 powders can result in certain difficulties associated with separating TiO2 from the treated wastewater. Therefore, immobilization of TiO2 on two different substrates, including glass and iron beads, was studied in this body of research work. The composite materials were prepared by spraying liquid dispersion onto the substrates, and the materials were then calcined at different temperatures (600-750 °C). At 700 °C calcination temperature, SEM and EDS analyses revealed that the particles of TiO2 were evenly distributed on the substrates. Importantly, the deposited TiO2 particles are mixed-phase anatase and rutile structures, both of which are considered beneficial to the photocatalysis process. Ultimately, a degree of direct dye photodegradation efficiency of 64.0 % at 4 h was achieved from the composite materials that were calcined at 700 °C. The degradation efficiency of the reused catalyst was not significantly changed in the second cycle revealing their capability in reusable. The stability of immobilized TiO2 onto the fixed substrates was still high after the second use.
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Affiliation(s)
- Woottikrai Chairungsri
- Department of Environmental Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai, 50200, Thailand; Graduate School, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Arisa Subkomkaew
- Department of Environmental Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai, 50200, Thailand; Graduate School, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Pimluck Kijjanapanich
- Department of Environmental Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai, 50200, Thailand; Center of Excellence in Materials Science and Technology, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Yothin Chimupala
- Research Laboratory of Pollution Treatment and Environmental Materials, Department of Industrial Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand; Center of Excellence in Materials Science and Technology, Chiang Mai University, Chiang Mai, 50200, Thailand.
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Auto-combustion Fabrication and Optical Properties of Zinc Oxide Nanoparticles for Degradation of Reactive Red 195 and Methyl Orange Dyes. J Inorg Organomet Polym Mater 2021. [DOI: 10.1007/s10904-021-01975-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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9
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ElZein B, Yao Y, Barham AS, Dogheche E, Jabbour GE. Toward the Growth of Self-Catalyzed ZnO Nanowires Perpendicular to the Surface of Silicon and Glass Substrates, by Pulsed Laser Deposition. MATERIALS 2020; 13:ma13194427. [PMID: 33027992 PMCID: PMC7579646 DOI: 10.3390/ma13194427] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 09/29/2020] [Accepted: 09/29/2020] [Indexed: 11/28/2022]
Abstract
Vertically-oriented zinc oxide (ZnO) nanowires were synthesized on glass and silicon substrates by Pulsed Laser Deposition and without the use of a catalyst. An intermediate c-axis oriented nanotextured ZnO seed layer in the form of nanowall network with honey comb structure allows the growth of high quality, self-forming, and vertically-oriented nanowires at relatively low temperature (<400 °C) and under argon atmosphere at high pressure (>5 Torr). Many parameters were shown to affect the growth of the ZnO nanowires such as gas pressure, substrate–target distance, and laser energy. Growth of a c-axis-crystalline array of nanowires growing vertically from the energetically favorable sites on the seed layer is observed. Nucleation occurs due to the matching lattice structure and the polar nature of the ZnO seed layer. Morphological, structural, and optical properties were investigated. X-ray diffraction (XRD) revealed highly c-axis aligned nanowires along the (002) crystal plane. Room temperature photoluminescence (PL) measurements showed a strong and narrow bandwidth of Ultraviolet (UV) emission, which shifts to lower wavelength with the increase of pressure.
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Affiliation(s)
- Basma ElZein
- Electrical Engineering Department, College of Engineering, University of Business and Technology (UBT), Jeddah 21361, Saudi Arabia
- Institute of Electronics, Microelectronics and Nanotechnology, CNRS and University Lille Nord de France- Avenue Poincaré, CEDEX, 59652 Villeneuve d’Ascq, France
- Correspondence:
| | - Yingbang Yao
- Faculty of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China;
| | - Ahmad S. Barham
- General Subjects Department, College of Engineering, University of Business and Technology (UBT), Jeddah 21361, Saudi Arabia;
| | - Elhadj Dogheche
- Campus Le Mont Houy, IEMN CNRS, Polytechnic University Hauts de France, CEDEX, 59309 Valenciennes, France;
| | - Ghassan E. Jabbour
- Canada Research Chair in Engineered Advanced Materials and Devices, Faculty of Engineering, University of Ottawa, Ottawa, ON K1N 6N5, Canada;
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La2CuO4-decorated ZnO nanoparticles with improved photocatalytic activity for malachite green degradation. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137749] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Sun J, Cai S, Li Q, Li Z, Xu G. UV-irradiation induced biological activity and antibacterial activity of ZnO coated magnesium alloy. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 114:110997. [PMID: 32994024 DOI: 10.1016/j.msec.2020.110997] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 03/26/2020] [Accepted: 04/20/2020] [Indexed: 11/19/2022]
Abstract
In order to improve the biological activity and antibacterial activity of magnesium alloy, the single zinc oxide (ZnO) coating was prepared on magnesium alloys using microwave aqueous synthesis method and followed heat treatment. Then, the coated magnesium alloys were irradiated with ultraviolet (UV) light for different time and subsequently immersed in simulated body fluids (SBF). The influences of UV-irradiated time on the morphology, composition, in vitro biological activity and antibacterial activity were investigated. The results indicated that the ability of the apatite formation on the ZnO coated magnesium alloys surface was significantly enhanced as UV irradiation time prolonged, and the bone-like apatite was formed after UV irradiation for 24 h and then immersing into SBF for 2 weeks, the newly formed apatite was dense and integrate, implying that UV irradiation could activate ZnO coating to improve the biological activity. Moreover, after immersing in SBF for 2 weeks, the antibacterial experiment results demonstrated that ZnO coated magnesium alloys with UV irradiation time of 24 h exhibited more effective antibacterial activity than those of naked magnesium alloys and ZnO coated magnesium alloys which were not irradiated by ultraviolet (UV) light. This work afforded a surface strategy for designing magnesium alloy implant with desirable osseointegration ability and antibacterial property simultaneously for orthopedic and dental applications.
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Affiliation(s)
- Jin'e Sun
- Tianjin College, Beijing University of Science and Technology, Tianjin 301800, China
| | - Shu Cai
- Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin 300072, China.
| | - Qianqian Li
- Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin 300072, China
| | - Zhaoyang Li
- Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin 300072, China
| | - Guohua Xu
- Department of Orthopedic Surgery, Changzheng Hospital, Second Military Medical University, Shanghai 200003, China.
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Zhang S, Khan I, Qin X, Qi K, Liu Y, Bai S. Construction of 1D Ag-AgBr/AlOOH Plasmonic Photocatalyst for Degradation of Tetracycline Hydrochloride. Front Chem 2020; 8:117. [PMID: 32195222 PMCID: PMC7066255 DOI: 10.3389/fchem.2020.00117] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2019] [Accepted: 02/07/2020] [Indexed: 11/13/2022] Open
Abstract
In this work, the highly efficient and low-cost Ag-AgBr/AlOOH plasmonic photocatalyst is successfully prepared via a simple and mild wet-chemical process and used for degrading high concentration methylene blue (MB) and tetracycline hydrochloride (TCH). The optimized 6-Ag-AgBr/AlOOH sample showed a 79% decomposition of TCH in 2 h, which is almost two times higher than that of bare AgBr (37%). For degrading MB, the photocatalytic activity of 6-Ag-AgBr/AlOOH (decomposing 84% in 2 h) showed a large enhancement as compared to bare AgBr (only 57%). The TEM, HRTEM, XRD, DRS, and XPS characterization results confirm that Ag-AgBr is a composite catalyst formed by loading Ag nanoparticles onto AgBr surfaces and then loaded on to AlOOH. The possible mechanism proposed is that •O2- and •OH radicals produced under sun light are the main active species for degrading MB and TCH. It is hoped that this work will open a new gateway to the synthesis of highly efficient and low-cost Ag-AgBr/AlOOH plasmonic photocatalysts for degrading organic pollutants.
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Affiliation(s)
- Siyang Zhang
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, China
| | - Iltaf Khan
- Key Laboratory of Functional Inorganic Materials Chemistry, School of Chemistry and Materials Science, Heilongjiang University, Harbin, China
| | - Xiaohong Qin
- Department of Information and Control Engineering, Shenyang Institute of Science and Technology, Shenyang, China
| | - Kezhen Qi
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, China.,Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin, China
| | - Ying Liu
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, China
| | - Shuchong Bai
- Institute of Paleontological, Shenyang Normal University, Shenyang, China
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Wang W, Qiao Z, Lee GJ, Chen H, Ding L, Zhu M, Liu N, Wu JJ. Preparation of ternary photocatalysts and their application in the degradation of 1,4-dioxane using O3/UV/photocatalyst process. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2019.116194] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Azfar AK, Kasim MF, Lokman IM, Rafaie HA, Mastuli MS. Comparative study on photocatalytic activity of transition metals (Ag and Ni)-doped ZnO nanomaterials synthesized via sol-gel method. ROYAL SOCIETY OPEN SCIENCE 2020; 7:191590. [PMID: 32257324 PMCID: PMC7062069 DOI: 10.1098/rsos.191590] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 01/30/2020] [Indexed: 05/31/2023]
Abstract
Ag and Ni/ZnO photocatalyst nanostructures were successfully synthesized by a sol-gel method. In this work, the photocatalyst sample was systematically studied based on several factors affecting the performance of photocatalyst, which are size, morphology, band gap, textural properties and the number of active sites presence on the surface of the nanocatalyst. X-ray diffraction revealed that Ag/ZnO nanomaterials experienced multiple phases, meanwhile for Ni/ZnO the phase of nanomaterials were pure and single phase for stoichiometry less than 5%. Field emission scanning electron microscope (FESEM) showed almost all of the synthesized nanomaterials possessed a mixture of nanorods and spherical-like shape morphology. The Ag/ZnO showed high photocatalytic activity, producing at least 14th trials of nanocatalyst reusability on degradation of methyl orange under UV irradiation. Interestingly, this phenomenon was not observed in larger surface area of Ni/ZnO nanomaterials which supposedly favour photocatalytic activity, but instead producing poor photocatalytic performance. The main reasons were studied and exposed by temperature-programmed desorption of carbon dioxide (TPD-CO2) which showed that incorporation of Ag into ZnO lattice has enhanced the number of active sites on the surface of the nanocatalyst. Whereas incorporation of Ni in ZnO has lowered the number of active sites with respect to undoped ZnO. Active sites measurement is effective and significant, providing opportunities in developing an intensive study as an additional factor.
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Affiliation(s)
- A. K. Azfar
- Centre for Nanomaterials Research, Institute of Science, Level 3 Block C, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
- School of Chemistry and Environment, Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
| | - M. F. Kasim
- Centre for Nanomaterials Research, Institute of Science, Level 3 Block C, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
- School of Chemistry and Environment, Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
| | - I. M. Lokman
- Centre for Nanomaterials Research, Institute of Science, Level 3 Block C, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
- School of Chemistry and Environment, Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
| | - H. A. Rafaie
- Faculty of Applied Sciences, Universiti Teknologi MARA Pahang, 26400 Bandar Tun Abdul Razak, Jengka, Pahang, Malaysia
| | - M. S. Mastuli
- Centre for Nanomaterials Research, Institute of Science, Level 3 Block C, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
- School of Chemistry and Environment, Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
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Arsalani N, Bazazi S, Abuali M, Jodeyri S. A new method for preparing ZnO/CNT nanocomposites with enhanced photocatalytic degradation of malachite green under visible light. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2019.112207] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Fan J, Cao DY, Pan TD, Xia ZP, Liu Y. S m Doped ZnO Nanowires@PAN Nanofibrous Membranes for Photocatalytic Degradation of Dye. RECENT PATENTS ON NANOTECHNOLOGY 2020; 14:56-63. [PMID: 31746300 DOI: 10.2174/1872210513666191119110316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 12/10/2018] [Accepted: 03/07/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Wastewater involving a lot of contaminants like organic dyes from the textile finishing industry causes a greater adverse impact on human beings. There are many patents on nanofibers involved metallic oxides, this paper studies photocatalytic degradation of free-pollution Zinc Oxide (ZnO) nanomaterials on dye decontamination. OBJECTIVE Polyacrylonitrile (PAN) nanofibrous membranes loaded with Zinc Oxide (ZnO) nanowires were fabricated and evaluated for photocatalytic degradation. METHODS In this work, Polyacrylonitrile (PAN) nanofibrous membranes loaded with ZnO seeds were prepared by electrospinning PAN/Zn (Ac)2 solution followed by a thermal decomposition process. ZnO nanowires were hydrothermally grown on the surface of PAN nanofibers. The effects of the ratio of PAN and zinc acetate in a solution, decomposition temperature and ammonia (NH4OH) on the morphologies of ZnO nanowires were observed. ZnO nanowires showed the optimum morphologies when the ratio of PAN/Zn (Ac)2 was 10:1.5. The decomposition temperature was 150oC, and NH4OH was added in the hydrothermal reaction. The photocatalytic degradation of Rhodamine B solution under UV irradiation was used as a model reaction. The photodegradation ability of the ZnO @PAN membrane doped with cerium (Sm) was also investigated. RESULTS Slight Sm doping increased the photocatalytic degradation rate from 57% to 89% under ultraviolet light irradiation for 2h. After 5 times of cycling under the same conditions, it still maintained the dye decolorization rate that was above 65%. CONCLUSION Sm doped ZnO nanowires @PAN nanofibrous membranes were easily produced and could provide a novel process for the degradation of dye decontamination.
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Affiliation(s)
- Jie Fan
- National Joint Engineering Research Center of High Performance Fibers and Textile Composites, Tianjin Polytechnic University, Tianjin 300387, China
| | - Dong-Yuan Cao
- National Joint Engineering Research Center of High Performance Fibers and Textile Composites, Tianjin Polytechnic University, Tianjin 300387, China
| | - Tian-Di Pan
- School of Textiles, Tianjin Polytechnic University, Tianjin 300387, China
| | - Zhao-Peng Xia
- National Joint Engineering Research Center of High Performance Fibers and Textile Composites, Tianjin Polytechnic University, Tianjin 300387, China
| | - Yong Liu
- National Joint Engineering Research Center of High Performance Fibers and Textile Composites, Tianjin Polytechnic University, Tianjin 300387, China
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Cho SI, Sung HK, Lee SJ, Kim WH, Kim DH, Han YS. Photovoltaic Performance of Dye-Sensitized Solar Cells Containing ZnO Microrods. NANOMATERIALS 2019; 9:nano9121645. [PMID: 31756910 PMCID: PMC6956303 DOI: 10.3390/nano9121645] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Revised: 11/16/2019] [Accepted: 11/18/2019] [Indexed: 11/16/2022]
Abstract
At an elevated temperature of 90 °C, a chemical bath deposition using an aqueous solution of Zn(NO3)2·6H2O and (CH2)6N4 resulted in the formation of both nanoflowers and microrods of ZnO on F-doped SnO2 glass with a seed layer. The nanoflowers and microrods were sensitized with dyes for application to the photoelectrodes of dye-sensitized solar cells (DSSCs). By extending the growth time of ZnO, the formation of nanoflowers was reduced and the formation of microrods favored. As the growth time was increased from 4 to 6 and then to 8 h, the open circuit voltage (Voc) values of the DSSCs were increased, whilst the short circuit current (Jsc) values varied only slightly. Changes in the dye-loading amount, dark current, and electrochemical impedance were monitored and they revealed that the increase in Voc was found to be due to a retardation of the charge recombination between photoinjected electrons and I3- ions and resulted from a reduction in the surface area of ZnO microrods. A reduced surface area decreased the dye contents adsorbed on the ZnO microrods, and thereby decreased the light harvesting efficiency (LHE). An increase in the electron collection efficiency attributed to the suppressed charge recombination counteracted the decreased LHE, resulting in comparable Jsc values regardless of the growth time.
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Affiliation(s)
- Seong Il Cho
- School of Advanced Materials and Chemical Engineering, Daegu Catholic University, Gyeongbuk 38430, Korea;
| | - Hye Kyeong Sung
- Department of Organic Material Science and Engineering, Pusan National University, Busan 46241, Korea;
| | - Sang-Ju Lee
- Division of Energy Technology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Korea; (S.-J.L.); (W.H.K.)
| | - Wook Hyun Kim
- Division of Energy Technology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Korea; (S.-J.L.); (W.H.K.)
| | - Dae-Hwan Kim
- Division of Energy Technology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Korea; (S.-J.L.); (W.H.K.)
- Correspondence: (D.-H.K.); (Y.S.H.); Tel.: +82-53-785-3720 (D.-H.K.); +82-53-850-2773 (Y.S.H.); Fax: +82-53-785-3739 (D.-H.K.); +82-53-359-6662 (Y.S.H.)
| | - Yoon Soo Han
- School of Advanced Materials and Chemical Engineering, Daegu Catholic University, Gyeongbuk 38430, Korea;
- Correspondence: (D.-H.K.); (Y.S.H.); Tel.: +82-53-785-3720 (D.-H.K.); +82-53-850-2773 (Y.S.H.); Fax: +82-53-785-3739 (D.-H.K.); +82-53-359-6662 (Y.S.H.)
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Synthesis of immobilized cerium doped ZnO nanoparticles through the mild hydrothermal approach and their application in the photodegradation of synthetic wastewater. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.12.103] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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A review on bio-synthesized zinc oxide nanoparticles using plant extracts as reductants and stabilizing agents. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2018; 183:201-221. [DOI: 10.1016/j.jphotobiol.2018.04.036] [Citation(s) in RCA: 146] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 03/28/2018] [Accepted: 04/21/2018] [Indexed: 11/17/2022]
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