JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2023
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IF 4.3
Hongyun Xue,Gansheng Shi,Guanhong Lu,Xinhong Xu,Xiaomeng Ren,Yan Wang,Xiao Wang,Xiaofeng Xie,Jing Sun
Constructing heterojunction structures is considered one of the effective methods to improve the activity of photocatalysts. A novel Z-Scheme heterojunction Fe-BDC/TiO 2 was designed and synthesized by amorphous gel Fe-BDC and TiO 2 nanoparticles with electrostatic self-assembly method. The introduction of Fe-BDC has been proved to expand the light absorption range and promote the separation and transfer of interface photo generated electrons and holes. Thus, the photocatalytic degradation efficiency of acetaldehyde by 5% Fe-BDC/TiO 2 sample is 2.3 times than that of pure TiO 2 sample. And the reaction rate is 2.5 times than that of pure TiO 2 sample. The free radical capture experiment shows that O 2 − played a more important role in the degradation of acetaldehyde. In addition, in situ infrared analysis further reveals the surface species of the photocatalysts during adsorption and degradation processes. The acetaldehyde degradation route of Fe-BDC/TiO 2 has been speculated. ‘1These findings provide valuable references for the design of metal oxide semiconductor/Fe based MOF heterojunctions and the efficient degradation of aldehyde VOCs.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2022
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IF 3.407
Zuchun Wang,Jian Zhang,Xiaodi Ji,Hao Wu,Xiaojin Xu,Jianming Zhan,Hongqi Shi,Wenjuan Liu,Tao Tang
ZnIn 2 S 4 as an energy band narrow photocatalyst has attracted extensive attentions in water remediation, but the fast carrier recombination efficiency hinders its further utilization. An effective strategy is to boost photocarrier separation and enhance photocatalysis performance by building heterojunction. Here, a simple in-situ deposition method is used to create a unique CdSe/ZnIn 2 S 4 heterojunction structure. By varying the CdSe content, CdSe/ZnIn 2 S 4 composites can be synthesized with diffident photocatalytic properties. The optimal photocatalytic efficiency of CdSe/ZnIn 2 S 4 composite is obtained when 1.0 % CdSe addition, while an overdose of CdSe QDs results in a deterioration of photocatalytic efficiency. 93 % tetracycline (TC) degradation could be attained. And the degradation rate is 1.9 and 2.3 times higher than pure ZnIn 2 S 4 and CdSe. In addition, the CdSe/ZnIn 2 S 4 photocatalytic mechanism complies with the Z-Scheme. In the photodegradation process, the superoxide radicals (·O 2 – ) and holes (h + ) are the primary active agents.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
DIAMOND AND RELATED MATERIALS
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2021
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IF 3.315
Jiao Wu,Jingyu Hu,Honghong Qian,Jianjun Li,Ran Yang,Lingbo Qu
The Nickel‑cobalt alloys/zinc oxide/graphitic carbon nitride (NiCo/ZnO/g-C 3 N 4 , NCZg) nanocomposites , magnetic Z-scheme heterojunction nanoparticles , were successfully synthesized. A series of characterization techniques were used to study the morphologies, chemical compositions and optical properties of the prepared NCZg. Using oxytetracycline (OTC) and tetracycline (TC) as target contaminants, the visible light degradation activity of NCZg nanocomposites was investigated. Under visible light, NCZg showed high photocatalytic degradation activity. The photocatalytic degradation rates of OTC and TC reached 71.3% and 81.29% in 50 min. The photocatalytic degradation efficiency of NCZg was obviously better than other materials reported in literatures. The capture experiments of reactive species showed that photogenerated holes (h + ) were the primary reason of photocatalytic degradation. This study provides a novel idea for the construction of high-performance photocatalyst for the degradation of OTC.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Ting Sun,Ping Gao,Yuqing He,Zhiren Wu,Jun Liu,Xinshan Rong
The development of an efficient catalyst that can use solar energy for NH 3 production is of great significance in solving the environmental and energy crisis caused by the traditional ammonia synthesis process. In this work, a dual Z-scheme tubular carbon nitride/zinc sulfide/zinc indium sulfide ternary composited photocatalyst (TCN/ZnS/ZnIn 2 S 4 ) with excellent nitrogen photofixation performance under visible light was prepared by self-assembly and hydrothermal methods . The crystal structure studies confirmed that tubular carbon nitride (TCN) had more active sites that could promote N 2 adsorption. The photochemical studies proved that the double charge transfer channel provided by the dual Z-scheme heterojunction could improve the efficiency of electron-hole separation and achieve excellent photocatalytic nitrogen fixation . The ammonia production rate of the TCN/ZnS/ZnIn 2 S 4 catalyst was up to 136.56 μmol/L, and it also has good stability and reusability. This work provides new insight into the development of Z-scheme heterojunction photocatalysts with green and efficient nitrogen fixation.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
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2024
·Vol. 39
·期 4
·869-876
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IF 1.3
Zhang Yanwei,Wang Yanze,Li Junguo,Xie Jingjing,Wang Wenxuan,Fu Zhengyi
We synthesized BiVO 4 mesocrystals with ordered assembly structure, and studied the structural order and the relationship between the photodegradation of Rhodamine B. Au nanoparticles (NPs) were successfully loaded onto Meso-BiVO 4 by light-assisted induction, and Cd nanoparticles were further selected to be deposited on Au nanoparticles to form Z-scheme photocatalyst Meso-BiVO 4 -Au-CdS heterostructures. We try and propose to analyze its ordered assembly structure by XRD for the first time. The results show that Meso-BiVO 4 is a mesocrystal with highly exposed (001) plane and directional assembly structure. The charge separation efficiency of all samples was studied by PL spectroscopy. The results show that the Z-scheme Meso-BiVO 4 -Au-CdS can promote the charge separation and obtain the best carrier separation efficiency. Thus, it has the best photocatalytic activity in the experiment of photocatalytic degradation of rhodamine B. The main active species in the degradation process were confirmed by free radical trapping experiment, and the degradation mechanism was put forward.
研究领域:
材料科学
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环境科学
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光催化
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DOI
高影响因子
CHEMOSPHERE
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2022
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IF 8.943
Yaoyi Li,Kexin Chen,Xi Wang,Zijun Xiao,Gaozu Liao,Jing Wang,Xukai Li,Yiming Tang,Chun He,Laisheng Li
In this study, reduced graphene oxide (rGO) was used to fabricate a Z-scheme BiVO 4 -(rGO-Cu 2 O) photocatalyst for the degradation of Tetrabromobisphenol A (TBBPA) under sunlight irradiation. The photocatalyst was synthesized using a three-step method BiVO 4 -(rGO-Cu 2 O) photocatalyst with an rGO loading of 1% and (rGO-Cu 2 O) to BiVO 4 ratio of 50% achieved the best degradation effect for TBBPA removal. Electron paramagnetic resonance spectroscopy (EPR) confirmed that the charge transfer path of BiVO 4 -(rGO-Cu 2 O) follows that of Z-scheme photocatalysts. Moreover, the addition of rGO increases the charge transfer efficiency. High performance liquid chromatography-mass spectrometry (HPLC-MS) was used to detect and analyze intermediate products, allowing the proposal of the main degradation pathway of TBBPA. Photogenerated electrons of BiVO 4 -(rGO-Cu 2 O) were then transferred into the conduction band of Cu 2 O. Cu 2 O is located in the surface layer, which has the most effective contact area with pollutants, and therefore has a good outcome for the photocatalytic reduction of TBBPA. Photogenerated electrons (e − ) and hydroxyl radicals (∙OH) are the main factors affecting TBBPA degradation. The degradation process of TBBPA includes electron reduction debromination , hydroxylation , and β-cleavage. In our work, BiVO 4 -(rGO-Cu 2 O) was successfully synthesized to degrade TBBPA; this study brings forth a novel approach for the degradation of halogenated organic pollutants using a Z-scheme photocatalytic composite.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2021
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IF 3.995
Yongbo Chen,Yi Zhou,Jin Zhang,Jiaxin Li,Tiantian Yao,Anna Chen,Zhiyue Chen
Construction of heterojunction is an effective way to improve the photocatalytic activity of photocatalyst . In this work, a simple precipitation method was adopted to anchor rod-like AgVO 3 on Bi 4 Ti 3 O 12 nanosheets to form heterojunction . The results show that Ag can act as an electronic medium to construct Z-scheme heterojunctions, that more visible light can be absorbed and facilitates the separation of electron hole pairs compared with the pure Bi 4 Ti 3 O 12 . The AgVO 3 /Bi 4 Ti 3 O 12 composites displayed superior photocatalytic photodegradation of tetracycline (TC) under visible irradiation (λ > 420 nm). 12%AgVO 3 /Bi 4 Ti 3 O 12 (AgVO 3 with the mass ratio of AgVO 3 /Bi 4 Ti 3 O 12 = 12%) showed the highest photocatalytic degradation efficiency, 57% of TC was degraded within 60 min which was the 9.5 times and 2.5 times higher than pure AgVO 3 and Bi 4 Ti 3 O 12 . The capture experiment results showed that ·O 2 − and h + are the main active radicals in the process of TC degradation. The improved photocatalytic activity is attributed to the construction of Z-scheme heterojunction , which leads to expand the light absorption range and efficient separation of photogenerated carriers. In addition, the mechanism of the photocatalytic degradation of antibiotics was proposed.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2019
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IF 5.155
Jun Feng,Tao Jiang,Yingchun Han,Otieno Kevin Okoth,Ling Cheng,Jingdong Zhang
A dual Z-scheme Bi 2 S 3 /Bi 2 O 3 /WO 3 ternary film was constructed via a controllable reduction of peroxotungstate by ethanol, calcination of Bi (NO 3 ) 3 and in situ anion exchange of Bi 2 O 3 with sulfide. The as-prepared composite film was characterized by scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The UV–visible diffuse reflectance spectroscopic and photoluminescence studies indicated that the introduction of Bi 2 S 3 in Bi 2 O 3 /WO 3 film effectively improved the absorption of the film in the visible region and suppressed the recombination of photogenerated carriers. The photoelectrocatalytic activity of the Bi 2 S 3 /Bi 2 O 3 /WO 3 film was evaluated by decoloration of Rhodamine B under visible light illumination. Compared with WO 3 and Bi 2 O 3 /WO 3 films, the Bi 2 S 3 /Bi 2 O 3 /WO 3 film exhibited much higher degradation efficiency. Moreover, the enhanced visible light photoelectrocatalytic activity of the Bi 2 S 3 /Bi 2 O 3 /WO 3 film was also demonstrated by efficient degradation of diclofenac. According to the reactive oxygen species detected by electron spin resonance, a dual Z-scheme system formed in the Bi 2 S 3 /Bi 2 O 3 /WO 3 film was proposed, which offered a new approach to the construction of semiconducting composite film with high photoelectrocatalytic performance for pollutant removal.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Yige Qi,Guoxi Zhou,Yunchao Wu,Hou Wang,Zhiyong Yan,Yan Wu
Semiconductor photocatalysis was considered as an ideal solution to energy shortages. Herein, a novel ternary In 2 O 3 /In 2 S 3 -CdIn 2 S 4 (IOSC) nanotube (NTs) photocatalyst was successfully constructed via in situ growth of In 2 S 3 and CdIn 2 S 4 nanosheets onto In 2 O 3 skeleton. It was used for the efficient and stable photo-production of hydrogen from water splitting. The rationally designed IOSC NTs displayed significantly enhanced photocatalytic H 2 production under visible light irradiation (≥420 nm), with the highest H 2 yield determined to be 2892 μmol·g −1 , which is much higher than that of pristine In 2 S 3 and In 2 O 3 /In 2 S 3 (IOS) NTs. Cyclic testing has shown that the IOSC2 product remains stable after four cycles of repeated use. The enhanced photocatalytic activity was contributed by its tightly bound tube-nanosheets heterogeneous structure and superior light absorption. Photoelectrons transfer in IOSC2 follows a Z-scheme mechanism, which greatly facilitates its utilization of photogenerated electrons and prevents CdIn 2 S 4 from undergoing photo-corrosion affecting material stability. This work demonstrates the key role of in situ growth in the interface design of ternary heterostructures.
研究领域:
材料科学
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能源化学
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DOI
PubMed
高影响因子
Catalysis Science & Technology
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2021
·Vol. 11
·期 23
·7683-7693
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IF 6.119
Jialiang Sheng,Chunqiang Wang,Fang Duan,Shengrong Yan,Shuanglong Lu,Han Zhu,Mingliang Du,Xin Chen,Mingqing Chen
The reasonable construction of Z-scheme heterojunctions is an effective pathway to enhance the photocatalytic performance. In this work, a direct Z-scheme cadmium sulfide–nickel phthalocyanine (CdS–NiPc) heterojunction was successfully constructed by a one-step solvothermal method, which exhibited highly efficient photocatalytic activity for hydrogen evolution and good cyclic stability under visible light irradiation. An optimal sample CdS–10%NiPc with 10 wt% NiPc was obtained, and the photocatalytic hydrogen production rate could reach 17.74 mmol h−1 g−1, which was 19.1 times higher than that of the pure CdS sample. The reasons for the improvement and the photocatalytic mechanism were studied in detail. The result indicated that the formation of a direct Z-scheme heterojunction made a close contact between CdS and NiPc, which effectively accelerated the separation and migration of charges. This study enriches the CdS-based composite photocatalysts for hydrogen evolution and provides a simple method for the construction of efficient Z-scheme inorganic–organic heterojunctions.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Xiaojing Yu,Haoran Qiu,Bin Wang,Qingnan Meng,Shaodong Sun,Yufei Tang,Kang Zhao
To construct Z-scheme not only can effectively separate the excited electron-hole pairs, but also utilize the ample redox capability of each semiconductor component in this system for the surface photocatalytic reaction. In this work, a TiO 2 –Au–BiOBr ternary Z-scheme photocatalyst was constructed, in which Au NPs were used as the electron mediator to join BiOBr nanosheets and TiO 2 nanofibers . The results showed that, under full spectrum irradiation, TiO 2 –Au–BiOBr nanofibers exhibited outstanding photocatalytic performance toward the degradation of Rhodamine B (RhB) with an excellent photodegradation efficiency of 99.91% within 30 min as well as good stability. The reaction mechanism of the TiO 2 –Au–BiOBr Z-scheme system was systemically studied by XPS , photoelectrochemical tests and free radical trapping experiments, etc. Moreover, the photocatalyst also exhibited excellent photocatalytic activity for degrading methyl orange and methylene blue.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Shuyu Chen,Zhengkai Wu,Xueying Cheng,Lu Chen,Yunning Chen,Yingna Guo,Changhua Wang,Qingkun Shang
In this work, we used a simple hydrothermal method to in-situ grow Zn 3 In 2 S 6 on MIL-100(Fe) octahedra, and obtained a MIL-100(Fe)@Zn 3 In 2 S 6 Z-scheme heterojunction photocatalyst. We systematically studied its performance in degrading phenol and p-nitrophenol (PNP) under visible light. MIL-ZIS 6 -2 can remove 89.1 % of phenol within 120 min and nearly 100 % of PNP within 60 min. Its photocatalytic activity to the degradation of phenol is 30.7 times and 1.7 times higher than that of MIL-100(Fe) and Zn 3 In 2 S 6 , respectively. And the photocatalytic activity to degrade PNP is 18.2 times and 1.4 times higher than MIL-100(Fe) and Zn 3 In 2 S 6 . Further research was conducted on its band structure and photocatalytic response mechanism through photoelectric performance, ultraviolet photo-electron spectroscopy, and electron spin resonance spectrometer testing. The results showed that the formation of Z-scheme heterojunction not only increased the specific surface area of the composite photocatalyst, enabling it to provide more reaction sites, but also effectively suppressed the recombination of photogenerated holes and electrons, improving the redox ability of the photocatalyst. This work provides a new perspective for constructing efficient Zn 3 In 2 S 6 -based composite photocatalysts and addressing environmental issues.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）