Construction of a direct Z-scheme Cs3Bi2Cl9/g-C3N4 heterojunction composite for efficient photocatalytic degradation of various pollutants in water: Performance, kinetics and degradation mechanism

被引：6
作者：
Derikvand H. [1 ]
Tahmasebi N. [1 ]
Barzegar S. [2 ]
机构：
[1] Department of Physics, Jundi-Shapur University of Technology, Dezful
[2] Department of Chemistry, Jundi-Shapur University of Technology, Dezful
来源：
Chemosphere | 2024年 / 355卷
关键词：
4-Nitrophenol; Lead-free perovskite; Metal halide perovskite; Photocatalysis; Tetracycline; Z-scheme heterojunction;
D O I：
10.1016/j.chemosphere.2024.141879
中图分类号：
学科分类号：
摘要：
The use of emerging composite materials has been booming to remove environmental pollutants. The aim of this research is to develop a new composite based on Cs3Bi2Cl9 perovskite and graphitic carbon nitride (g-C3N4) to investigate the photocatalytic performance under visible light irradiation. To achieve this, we produce the Cs3Bi2Cl9/g-C3N4 heterojunctions through a simple self-assembly synthesis. The as-synthesized composites are characterized using XRD, FTIR, FESEM, TEM, BET and EDX techniques. The photocatalytic performance of Cs3Bi2Cl9/g-C3N4 is examined in the degradation of various water contaminants, including 4-nitrophenol (4-NP), tetracycline antibiotic (TC), methylene blue (MB) and methyl orange (MO). The experimental results indicate the superior photocatalytic performance of the composites in the degradation of pollutants compared to pure Cs3Bi2Cl9 and g-C3N4. The 10% Cs3Bi2Cl9/g-C3N4 composite achieves the optimal degradation efficiency of 100, 92, 98.7, and 85.1% of 4-NP, TC, MB, and MO, respectively. This superior photocatalytic activity attributes to improved optical and electrochemical properties, including enhanced absorption ability, narrowing band gap, promoted separation efficiency of photogenerated carriers, and a high redox potential, which is confirmed by UV–vis DRS, PL, EIS, and CV analyses. The 10% Cs3Bi2Cl9/g-C3N4 composite also demonstrates high photocatalytic stability after four consecutive cycles. Radical trapping tests show that superoxide radicals (•O2 −), holes (h+), and hydroxyl radicals (•OH) contribute to the photocatalytic process. Based on the obtained data, a direct Z-scheme heterojunction mechanism is proposed. Overall, this research offers a new stable photocatalyst with excellent prospect for photocatalytic applications. © 2024 Elsevier Ltd
引用
收藏
相关论文
共 56 条
[1]  
Abazari R., Mahjoub A.R., Salehi G., Preparation of amine functionalized g-C<sub>3</sub>N<sub>4</sub>@<sup>H/S</sup>MOF NCs with visible light photocatalytic characteristic for 4-nitrophenol degradation from aqueous solution, J. Hazard Mater., 365, pp. 921-931, (2019)
[2]  
Abdel-Aziz A.M., Hassan H.H., Badr I.H., Activated glassy carbon electrode as an electrochemical sensing platform for the determination of 4-nitrophenol and dopamine in real samples, ACS Omega, 7, 38, pp. 34127-34135, (2022)
[3]  
Akinbami O., Moepya R., Ngubeni G.N., Tetyana P., Mubiayi K.P., Moloto M.J., Moloto N., Lead-free rudorffite-type Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> nanoparticles for photocatalytic degradation of rhodamine b and methylene blue, J. Photochem. Photobiol., A: Chem, 419, (2021)
[4]  
Amangelsin Y., Semenova Y., Dadar M., Aljofan M., Bjorklund G., The impact of tetracycline pollution on the aquatic environment and removal strategies, Antibiotics, 12, 3, (2023)
[5]  
Baghdadi Y., Temerov F., Cui J., Daboczi M., Rattner E., Sena M.S., Itskou I., Eslava S., Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub>/g-C<sub>3</sub>N<sub>4</sub> direct Z-Scheme heterojunction for enhanced photocatalytic reduction of CO<sub>2</sub> to CO, Chem. Mater., 35, 20, pp. 8607-8620, (2023)
[6]  
Bashir I., Lone F.A., Bhat R.A., Mir S.A., Dar Z.A., Dar S.A., Concerns and threats of contamination on aquatic ecosystems, Bioremediat. Biodegrad: Sustain. Approaches Pollut. Degrad., pp. 1-26, (2020)
[7]  
Bhattacharjee S., Chaudhary S.P., Bhattacharyya S., Lead-free metal halide perovskite nanocrystals for photocatalysis in water, ChemRxiv, pp. 1-27, (2019)
[8]  
Bresolin B.M., Sgarbossa P., Bahnemann D.W., Sillanpaa M., Cs<sub>3</sub>Bi<sub>2</sub>I<sub>9</sub>/g-C<sub>3</sub>N<sub>4</sub> as a new binary photocatalyst for efficient visible-light photocatalytic processes, Sep. Purif. Technol., 251, (2020)
[9]  
Cao W., Yuan Y., Yang C., Wu S., Cheng J., In-situ fabrication of g-C<sub>3</sub>N<sub>4</sub>/MIL-68(In)-NH<sub>2</sub> heterojunction composites with enhanced visible-light photocatalytic activity for degradation of ibuprofen, Chem. Eng. J., 391, (2020)
[10]  
Chen S., Liu R., Kuai Z., Li X., Lian S., Jiang D., Tang J., Li L., Wu R., Peng C., Facile synthesis of a novel BaSnO<sub>3</sub>/MXene nanocomposite by electrostatic self-assembly for efficient photodegradation of 4-nitrophenol, Environ. Res., 204, (2022)
123456