1
|
Fu H, Deng Y, Cai Z, Pan Y, Yang L, Fujita T, Wang N, Wang Y, Wang X. Designing Z-scheme In 2O 3 @ZnIn 2S 4 core-shell heterojunctions for enhanced photocatalytic multi-pollutant removal. JOURNAL OF HAZARDOUS MATERIALS 2024; 463:132820. [PMID: 37898084 DOI: 10.1016/j.jhazmat.2023.132820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 07/30/2023] [Accepted: 10/19/2023] [Indexed: 10/30/2023]
Abstract
In water bodies, the coexistence of and interaction between multiple pollutants complicate remediation. In this study, the In2O3 @ZnIn2S4 Z-scheme heterojunction with a stratified core-shell structure was constructed and used to remove multiple pollutants (tetracycline hydrochloride and Cr(VI)). The large number of active sites and the mechanism of photogenerated charge separation ensured the substantially enhanced catalytic activity of this photocatalyst, making it superior to In2O3 nanospheres and pure ZnIn2S4. The optimised In2O3 @ZnIn2S4 nano-flowers (In2O3 @ZnIn2S4 NFs) realised 99.8% removal of tetracycline hydrochloride and 100% removal of Cr(VI) within 60 min under visible-light. The material's high stability was demonstrated by five experiment cycles. Effects of organics, inorganics, and pH about the photocatalytic performance of the optimised In2O3 @ZnIn2S4 NFs when tetracycline hydrochloride and Cr(VI) coexist were also explored. Finally, the intermediates and degradation pathways were analysed, and the possible photocatalytic mechanism was also investigated by performing density functional theory calculations.
Collapse
Affiliation(s)
- Hao Fu
- School of Chemistry & Chemical Engineering, Guangxi University, Nanning 530004, PR China; School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China; State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning 530004, PR China
| | - Yuxiang Deng
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China; State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning 530004, PR China
| | - Zhenyu Cai
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China; State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning 530004, PR China
| | - Yuehua Pan
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China; State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning 530004, PR China
| | - Libo Yang
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China; State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning 530004, PR China
| | - Toyohisa Fujita
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China
| | - Nannan Wang
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China
| | - Youbin Wang
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China
| | - Xinpeng Wang
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China; State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning 530004, PR China.
| |
Collapse
|
2
|
Zheng S, Li X, Zhang J, Wang J, Zhao C, Hu X, Wu Y, He Y. One-step preparation of MoO x/ZnS/ZnO composite and its excellent performance in piezocatalytic degradation of Rhodamine B under ultrasonic vibration. J Environ Sci (China) 2023; 125:1-13. [PMID: 36375896 DOI: 10.1016/j.jes.2021.10.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 10/14/2021] [Accepted: 10/26/2021] [Indexed: 06/16/2023]
Abstract
This paper synthesized a new type of ternary piezoelectric catalyst MoOx/ZnS/ZnO (MZZ) by a one-step method. The catalytic degradation of Rhodamine B (RhB) solution (10 µg/g, pH = 7.0) shows that the composite catalyst has excellent piezoelectric catalytic activity under ultrasonic vibration (40 kHz). The piezoelectric degradation rate of the optimal sample reached 0.054 min-1, which was about 2.5 times that of pure ZnO. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman, transmission electron microscopy (TEM), scanning electron microscopy (SEM), and electrochemical impedance spectroscopy (EIS) technologies were used to analyze the structure, morphology, and interface charge transfer properties of the MZZ piezocatalysts. The results showed that the composite catalyst may have a core-shell structure. ZnS is coated on the surface of ZnO, while MoOx adheres to the surface of ZnS. This structure endowed MZZ larger specific surface area than ZnO, which benefits the RhB adsorption. More importantly, the formed heterojunction structure between ZnS and ZnO promotes the separation of positive and negative charges induced by the piezoelectric effect. MoOx species may act as a charge trap to further promote more carriers to participate in the reaction. In addition, MoOx may also be beneficial in adsorbing dyes. Active species capture experiments show that superoxide radicals and holes are the main active species in piezoelectric catalytic reactions on MZZ catalysts.
Collapse
Affiliation(s)
- Song Zheng
- Department of Materials Science and Engineering, Zhejiang Normal University, Jinhua 321004, China
| | - Xiaojing Li
- Department of Materials Science and Engineering, Zhejiang Normal University, Jinhua 321004, China
| | - Jiayu Zhang
- Department of Materials Science and Engineering, Zhejiang Normal University, Jinhua 321004, China
| | - Junfeng Wang
- Department of Materials Science and Engineering, Zhejiang Normal University, Jinhua 321004, China
| | - Chunran Zhao
- Department of Materials Science and Engineering, Zhejiang Normal University, Jinhua 321004, China
| | - Xin Hu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, China.
| | - Ying Wu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, China.
| | - Yiming He
- Department of Materials Science and Engineering, Zhejiang Normal University, Jinhua 321004, China; Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, China.
| |
Collapse
|
3
|
Synthesis of Mg-Al Hydrotalcite Clay with High Adsorption Capacity. MATERIALS 2021; 14:ma14237231. [PMID: 34885385 PMCID: PMC8658313 DOI: 10.3390/ma14237231] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/17/2021] [Accepted: 11/25/2021] [Indexed: 11/17/2022]
Abstract
A novel Mg-Al metal oxide has been successfully synthesized by the calcination of hierarchical porous Mg-Al hydrotalcite clay obtained by using filter paper as a template under hydrothermal conditions. Various characterizations of the obtained nanoscale oxide particles verified the uniform dispersion of Mg-Al metal oxides on the filter paper fiber, which had a size of 2–20 nm and a highest specific surface area (SSA) of 178.84 m2/g. Structural characterization revealed that the as-prepared Mg-Al metal oxides preserved the tubular morphology of the filter paper fibers. Further experiments showed that the as-synthesized Mg-Al metal oxides, present at concentrations of 0.3 g/L, could efficiently remove sulfonated lignite from oilfield wastewater (initial concentration of 200 mg/L) in a neutral environment (pH = 7) at a temperature of 298 K. An investigation of the reaction kinetics found that the adsorption process of sulfonated lignite (SL) on biomorphic Mg-Al metal oxides fits a Langmuir adsorption model and pseudo-second-order rate equation. Thermodynamic calculations propose that the adsorption of sulfonated lignite was spontaneous, endothermic, and a thermodynamically feasible process.
Collapse
|
4
|
Zhou Y, Jiao W, Xie Y, He F, Ling Y, Yang Q, Zhao J, Ye H, Hou Y. Enhanced photocatalytic CO 2-reduction activity to form CO and CH 4 on S-scheme heterostructured ZnFe 2O 4/Bi 2MoO 6 photocatalyst. J Colloid Interface Sci 2021; 608:2213-2223. [PMID: 34753624 DOI: 10.1016/j.jcis.2021.10.053] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 10/10/2021] [Accepted: 10/11/2021] [Indexed: 10/20/2022]
Abstract
A novel ZnFe2O4/Bi2MoO6 heterojunction photocatalyst was synthesized by a facile solvothermal route. The incorporation of a narrow bandgap ZnFe2O4 photocatalyst can efficiently improve the range of light response and light absorption capacity of the Bi2MoO6 via the formation of a hybrid structure at the interface. The formed hybrid interface facilitates the separation efficiency of photo-generated carriers at ZnFe2O4/Bi2MoO6 heterojunction significantly. The experimental results confirm that ZnFe2O4/Bi2MoO6-20% heterojunction showed the highest photocatalytic efficiency for CO2 reduction. Specifically, the total product yield of 47.1 μmol g-1 under 5 h simulated sunlight irradiation is measured in the counterparts of pure ZnFe2O4 (14.79 μmol g-1) and pure Bi2MoO6 (19.01 μmol g-1). Indeed, the formation of ZnFe2O4/Bi2MoO6 heterojunction improved the photocatalytic efficiency for CO2 reduction.
Collapse
Affiliation(s)
- Yipeng Zhou
- College of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, China
| | - Wenyu Jiao
- College of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, China
| | - Yu Xie
- College of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, China.
| | - Fan He
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou China
| | - Yun Ling
- College of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, China
| | - Qi Yang
- College of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, China
| | - Jinsheng Zhao
- Shandong Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252059, China.
| | - Hao Ye
- College of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, China
| | - Yang Hou
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou China; School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou, Jiangxi 341000, China.
| |
Collapse
|