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Luu TVH, Dao NN, Nguyen VV, Nguyen QB, Nguyen THC, Pham NC, Dao NH, Nguyen TK. Microwave-assisted synthesis of self-assembled C-doped-ZnO/g-C 3N 4 heterojunction catalysts for effective photodegradation of ofloxacin antibiotic. NANOSCALE ADVANCES 2025; 7:2916-2928. [PMID: 40170907 PMCID: PMC11956032 DOI: 10.1039/d5na00060b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2025] [Accepted: 03/15/2025] [Indexed: 04/03/2025]
Abstract
In this study, carbon-doped zinc oxide (CZ45) prepared using the microwave-assisted solvothermal method was electrostatically assembled with graphitic carbon nitride (GCN) to obtain CZ45/GCN (CZCN) heterojunction photocatalysts. The obtained composites showed average sizes in the range of 19.12-20.51 nm with the disintegration of petal-like stacked GCN sheets. A significant decrease in the bandgap (E g) from 3.12 eV in CZ45 to 2.67-2.81 eV in the CZCN composites and the photoluminescence (PL) spectra indicated an enhanced charge carrier separation suitable for the catalytic application under visible light irradiation. The CZCN11 composite (E g = 2.81 eV) with a CZ45 : GCN weight ratio of 1 : 1 demonstrated outstanding photocatalytic performance in the degradation of ofloxacin (OFL) antibiotics compared to the other prepared CZCN composites as well as GCN and CZ45. The optimal parameters for OFL photodegradation by CZCN11 were determined; the CZCN11 dosage, OFL initial concentration, and pH range were found to be 1.01 g L-1, 20 ppm, and 7.0-8.0, respectively. Under these conditions, about 96% of the initial amount of OFL was decomposed at an apparent rate of 0.0173 min-1 in 180 min. A reusability test indicated the excellent durability and recyclability of CZCN11 in OFL photodegradation since the degradation efficiency was reduced only by about 1% after five successive runs without any alteration in the original structure of the composite. Furthermore, the active-charge-trapping experiments displayed the crucial role of superoxide (˙O2 -) radicals in OFL photodegradation by the CZCN composites.
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Affiliation(s)
- Thi Viet Ha Luu
- Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City 12 Nguyen Van Bao Street Ho Chi Minh City 700000 Vietnam
| | - Ngoc Nhiem Dao
- Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Street, Cau Giay Hanoi 100000 Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Street, Cau Giay Hanoi 100000 Vietnam
| | - Van Vinh Nguyen
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Street, Cau Giay Hanoi 100000 Vietnam
- Joint Vietnam-Russia Tropical Science and Technology Research Center 63 Nguyen Van Huyen Street, Cau Giay Hanoi 100000 Vietnam
| | - Quang Bac Nguyen
- Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Street, Cau Giay Hanoi 100000 Vietnam
| | - Thi Ha Chi Nguyen
- Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Street, Cau Giay Hanoi 100000 Vietnam
| | - Ngoc Chuc Pham
- Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Street, Cau Giay Hanoi 100000 Vietnam
| | - Ngoc Hoanh Dao
- Faculty of Mechanical Technology, School of Mechanical and Automotive Engineering, Hanoi University of Industry 298 Cau Dien, Bac Tu Liem Hanoi 100000 Vietnam
| | - Trung Kien Nguyen
- Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Street, Cau Giay Hanoi 100000 Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Street, Cau Giay Hanoi 100000 Vietnam
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Hossain SM, Patnaik P, Sharma R, Sarkar S, Chatterjee U. Unveiling CeZnO x Bimetallic Oxide: A Promising Material to Develop Composite SPPO Membranes for Enhanced Oxidative Stability and Fuel Cell Performance. ACS APPLIED MATERIALS & INTERFACES 2024; 16:7097-7111. [PMID: 38296332 DOI: 10.1021/acsami.3c16113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/16/2024]
Abstract
The incorporation of cerium-zinc bimetallic oxide (CeZnOx) nanostructures in sulfonated poly(2,6-dimethyl-1,4-phenylene oxide) (SPPO) membranes holds promise in an enhanced and durable fuel cell performance. This investigation delves into the durability and efficiency of SPPO membranes intercalated with CeZnOx nanostructures by varying the filler loading of 1, 2, and 3% (w/w). The successful synthesis of CeZnOx nanostructures by the alkali-aided deposition method is confirmed by wide-angle X-ray diffraction spectroscopy (WAXS), Raman spectroscopy, field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) analyses. CeZnOx@SPPO nanocomposite membranes are fabricated using a solution casting method. The intricate interplay of interfacial adhesion and coupling configuration between three-dimensional CeZnOx and sulfonic moieties of the SPPO backbone yields an enhancement in the bound water content within the proton exchange membranes (PEMs). This constructs simultaneously an extensive hydrogen bonding network intertwined with the proton transport channels, thereby elevating the proton conductivity (Km). The orchestrated reversible redox cycling involving Ce3+/Ce4+ enhances the quenching of aggressive radicals, aided by Zn2+, promoting oxygen deficiency and Ce3+ concentration. This synergistic efficacy ultimately translates into composite PEMs characterized by a mere 4% mass loss and a nominal 6% decrease in Km after rigorous exposure to Fenton's solution. Remarkably, an improved power density of 403.2 mW/cm2 and a maximum current density of 1260.6 mA/cm2 were achieved with 2% loading of CeZnOx (SPZ-2) at 75 °C and 100% RH. The fuel cell performance of SPZ-2 is 74% higher than its corresponding pristine SPPO membrane.
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Affiliation(s)
- Sk Miraz Hossain
- Membrane Science and Separation Technology Division, CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Pratyush Patnaik
- Membrane Science and Separation Technology Division, CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Ritika Sharma
- Membrane Science and Separation Technology Division, CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Suman Sarkar
- Membrane Science and Separation Technology Division, CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Uma Chatterjee
- Membrane Science and Separation Technology Division, CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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Ha Luu TV, Dao NN, Le Pham HA, Nguyen QB, Nguyen VC, Dang PH. One-step hydrothermal preparation of Ta-doped ZnO nanorods for improving decolorization efficiency under visible light. RSC Adv 2023; 13:5208-5218. [PMID: 36777945 PMCID: PMC9912144 DOI: 10.1039/d2ra07655a] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 01/19/2023] [Indexed: 02/12/2023] Open
Abstract
In this work, Ta-doped ZnO (Ta-ZnO) nanomaterials were synthesized by the hydrothermal method at different temperatures (110, 150, and 170 °C) for the photodegradation of methylene blue (MB) under visible light. Ta doping significantly affects the crystal defects, optical properties, and MB photocatalytic efficiency of ZnO materials. The optical absorption edge of Ta-ZnO 150 was redshifted compared to undoped ZnO, correlating to bandgap narrowing (E gTa-ZnO = 2.92 eV; E gZnO = 3.07 eV), implying that Ta doped ZnO is capable of absorbing visible light. Besides, Ta-doping was the reason for enhanced blue light emission in the photoluminescence spectrum, which is related to the oxygen defect V 0 O. It is also observed in the XPS spectra, where the percentage of oxygen in the oxygen-deficient regions (O531.5 eV) of Ta-ZnO150 is higher than that of ZnO150. It is an important factor in enhancing ZnO's photocatalytic efficiency. The MB degradation efficiency of Ta-doped ZnO reached the highest for Ta-ZnO 150 and was 2.5 times higher than ZnO under a halogen lamp (HL). Notably, the influence of hydrothermal temperature on the structural, morphological, and photoelectrochemical properties was discussed in detail. As a result, the optimal hydrothermal temperature for synthesizing the nanorod is 150 °C. Furthermore, photocatalytic experiments were also performed under simulated sunlight and natural sunlight. The nature of the photo-oxidative degradation of MB was also investigated.
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Affiliation(s)
- Thi Viet Ha Luu
- Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City Ho Chi Minh City 700000 Vietnam
| | - Ngoc Nhiem Dao
- Institute of Materials Science, Vietnam Academy of Science and Technology18 Hoang Quoc VietHanoi100000Vietnam,Graduate University of Science and Technology, Vietnam Academy of Science and Technology18 Hoang Quoc VietHanoi100000Vietnam
| | - Hoang Ai Le Pham
- Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City Ho Chi Minh City 700000 Vietnam
| | - Quang Bac Nguyen
- Institute of Materials Science, Vietnam Academy of Science and Technology18 Hoang Quoc VietHanoi100000Vietnam,Graduate University of Science and Technology, Vietnam Academy of Science and Technology18 Hoang Quoc VietHanoi100000Vietnam
| | - Van Cuong Nguyen
- Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City Ho Chi Minh City 700000 Vietnam
| | - Phuc Huu Dang
- Faculty of Fundamental Science, Industrial University of Ho Chi Minh City Ho Chi Minh City 700000 Vietnam
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Luu TVH, Nguyen QB, Nguyen THC, Pham NC, Duong TL, Le BH, Nguyen VNM, Vu MC, Pham NN, Dao NN, Nguyen TK. One-pot hydrothermal preparation of capsule-like nanocomposites of C/Ce-co-doped ZnO supported on graphene to enhance photodegradation. NEW J CHEM 2023. [DOI: 10.1039/d2nj04937f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Nanocapsule composites of C/Ce-co-doped ZnO supported on graphene synthesized by a one-pot hydrothermal method with a band gap of 2.72 eV were used to enhance the photodegradation of methylene blue under various conditions.
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Affiliation(s)
- Thi Viet Ha Luu
- Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City, 700000, Vietnam
| | - Quang Bac Nguyen
- Institute of Material Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Thi Ha Chi Nguyen
- Institute of Material Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Ngoc Chuc Pham
- Institute of Material Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Thi Lim Duong
- Institute of Geography, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Bao Hung Le
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
- Vietnam – Russian Tropical Centre, 63 Nguyen Van Huyen, Cau Giay, Hanoi 100000, Vietnam
| | - Vu Ngoc Mai Nguyen
- Faculty of Natural Sciences, Quy Nhon University, 170 An Duong Vuong, Quy Nhon, Binh Dinh 590000, Vietnam
| | - Minh Chau Vu
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
- Vietnam – Russian Tropical Centre, 63 Nguyen Van Huyen, Cau Giay, Hanoi 100000, Vietnam
| | - Ngo Nghia Pham
- Institute of Environmental Engineering and Management, University of Witten/Herdecke, Alfred-Herrhausen-Str. 44, 58455 Witten, Germany
- Faculty of Chemistry, VNU University of Science, 19 Le Thanh Tong, Hoan Kiem, Hanoi 100000, Vietnam
| | - Ngoc Nhiem Dao
- Institute of Material Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Trung Kien Nguyen
- Institute of Material Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
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Influence of Ce3+ (Rare Earth Element) on the Structural, Morphological, Impedance, Binding Energy and Ferrimagnetic Properties of Spinel ZnFe2O4 Nanoparticles Fabricated by the Coprecipitation Method: Antibacterial Activity. CHEMISTRY AFRICA 2022. [DOI: 10.1007/s42250-022-00570-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Zhao SR, Yuan XY, Chen YX, Lu Y, Zhang M, Liu JK. Enhancing Corrosion Inhibition Performance of ZnO Solid Solution by Doping Variable-Valence Rare-Earth Element Cerium. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c04162] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Si-Rui Zhao
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Xiao-Yu Yuan
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Yi-Xiang Chen
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Yi Lu
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
- Material Corrosion and Protection Key Laboratory of Sichuan Province, Sichuan University of Science and Engineering, Zigong, Sichuan 643000, P. R. China
| | - Min Zhang
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Jin-Ku Liu
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
- Material Corrosion and Protection Key Laboratory of Sichuan Province, Sichuan University of Science and Engineering, Zigong, Sichuan 643000, P. R. China
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Cerium-, Europium- and Erbium-Modified ZnO and ZrO2 for Photocatalytic Water Treatment Applications: A Review. Catalysts 2021. [DOI: 10.3390/catal11121520] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
In the last decades photocatalysis has become one of the most employed technologies for the implementation of the so-called Advanced Oxidation Processes (AOPs) for the removal of harmful pollutants from wastewaters. The materials identified as the best photocatalysts are transition metal oxides, in which the band structure allows charge carrier separation upon solar irradiation. The photoinduced charge carrier can thus cause oxidative and reductive redox reactions at the surface, inducing the formation of the radical species able to initiate the AOPs. Despite the great advantages of this process (non-toxic, cheap and environmentally clean), the main drawback lies in the fact that the most efficient semiconductors are only able to absorb UV irradiation, which accounts for only 5% of the total solar irradiation at the Earth’s surface and not enough to generate the required amount of electron-hole pairs. On the other hand, many efforts have been devoted to the sensitization of wide band gap transition metal oxides to visible light, which represents a higher percentage (almost 45%) in the solar electromagnetic spectrum. Among all the strategies to sensitize transition metal oxides to visible irradiation, doping with lanthanides has been less explored. In this regard, lanthanides offer a unique electronic configuration, consisting in 4f orbitals shielded by a 5s5p external shell. This occurrence, coupled with the different occupation of the localized 4f orbitals would provide an astounding opportunity to tune these materials’ properties. In this review we will focus in depth on the modification of two promising photocatalytic transition metal oxides, namely ZnO and ZrO2, with cerium, europium and erbium atoms. The aim of the work is to provide a comprehensive overview of the influence of lanthanides on the structural, optical and electronic properties of the modified materials, emphasizing the effect of the different 4f orbital occupation in the three considered doping atoms. Moreover, a large portion of the discussion will be devoted to the structural-properties relationships evidencing the improved light absorption working mechanism of each system and the resulting enhanced photocatalytic performance in the abatement of contaminants in aqueous environments.
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Luu TVH, Nguyen QB, Dao NN, Luu MD, Doan VD, Pham NC, Duong TL, Pham NN. A comparative study of 0D and 1D Ce-ZnO nanocatalysts in photocatalytic decomposition of organic pollutants. RSC Adv 2021; 11:36078-36088. [PMID: 35492758 PMCID: PMC9043341 DOI: 10.1039/d1ra07493h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Accepted: 11/02/2021] [Indexed: 11/21/2022] Open
Abstract
Nanosized zinc oxide is an intriguing material that can be applied in various fields. In this study, Ce doped ZnO nano-catalysts (Ce-ZnO) were synthesized by two different methods (i.e., hydrothermal (Ce-ZnO-HT) and polymer gel combustion (Ce-ZnO-CB) methods) to compare their photodegradation efficiency. The prepared material characteristics were investigated using XRD, SEM, TEM, FTIR, UV-Vis, PL, XPS, EDS, and BET. The bandgap of both nanoparticles (NPs) was 2.95 eV, despite the fact that the morphology of Ce-ZnO-HT NPs was 1D-rod-shaped and that of Ce-ZnO-CB NPs was 0D-spherical. However, the surface area and oxygen vacancy rate of Ce-ZnO-HT NPs were higher than those of Ce-ZnO-CB NPs. These differences are directly related to the photocatalytic activity of Ce-ZnO NPs. Accordingly, the results showed that photocatalytic efficiency was classified in the order Ce-ZnO-HT > Ce-ZnO-CB > pure ZnO, and the photocatalytic reaction rate constant of Ce-ZnO-HT used to decompose MB was 3.0 times higher than that of Ce-ZnO-CB. Interestingly, the photodegradation mechanism study revealed that hydroxyl radicals and holes were shown to be more important contributors to methyl blue degradation than photo-induced electrons and superoxide radical ions. Ce doped ZnO nano-catalysts were synthesized by two different methods i.e., hydrothermal and polymer gel combustion method, to compare their photodegradation efficiency.![]()
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Affiliation(s)
- Thi Viet Ha Luu
- Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City Ho Chi Minh City 70000 Vietnam
| | - Quang Bac Nguyen
- Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi 10000 Vietnam .,Graduate University of Science and Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi 10000 Vietnam
| | - Ngoc Nhiem Dao
- Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi 10000 Vietnam .,Graduate University of Science and Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi 10000 Vietnam
| | - Minh Dai Luu
- Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi 10000 Vietnam
| | - Van Dat Doan
- Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City Ho Chi Minh City 70000 Vietnam
| | - Ngoc Chuc Pham
- Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi 10000 Vietnam
| | - Thi Lim Duong
- Institute of Geography, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi 10000 Vietnam
| | - Ngo Nghia Pham
- Faculty of Chemistry, VNU - University of Science 334 Nguyen Trai Hanoi 10000 Vietnam
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