JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Wenhong Yang,Yujing Dong,Zhipeng Wang,Yuqin Li,Chunhui Dai,Dongwei Ma,Yu Jia,Zhen Yang,Chao Zeng
A series of Sn 2+ doped MgIn 2 S 4 photocatalysts were prepared via a facial hydrothermal method . The Sn dopants substitute the sites of Mg atom in MgIn 2 S 4 unit cell, but not alter the crystal structure, demonstrated by the results of XRD and XPS . Compared to pristine MgIn 2 S 4 , Sn-doped MgIn 2 S 4 samples exhibit significantly enhanced photocatalytic CO 2 reduction activity. With increasing the Sn dopant content, the CO 2 conversion rate first ascends, achieving the maximum rate at Sn-MgIn 2 S 4 -2 sample, and then decreases. After illumination for 4 h, the highest yield of CO and CH 4 for Sn-MgIn 2 S 4 -2 sample reaches about 3.35 and 3.33 times higher than that of pristine MgIn 2 S 4 . The theoretical results based on density functional theory calculations reveal that Sn doping in MgIn 2 S 4 tunes the band structure from the direct-transition of MgIn 2 S 4 to indirect-transition, diminishes band gap and extends the light absorption range, reduces the effective masses of holes and promotes the migration of photoinduced carriers. The experimental results also demonstrate the positive role of Sn dopant in accelerating the separation and transportation of charges, and improving CO 2 adsorption ability. This work systematically investigates and discusses the Sn 2+ doping effect in MgIn 2 S 4 on crystal structure, lattice variations, electronic band structures , CO 2 adsorption ability, and photocatalytic CO 2 reduction activity, which can provide a new hint for the fabrication of efficient photocatalyst by metal ion doping.
研究领域:
材料科学
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环境科学
·
化学
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DOI
高影响因子
Catalysis Science & Technology
·
2021
·Vol. 11
·期 18
·6271-6280
·
IF 6.119
Jiaqi Dong,Jianqiang Hu,Anyu Liu,Jiale He,Qingling Huang,Yanru Zeng,Wenjing Gao,Zhen Yang,Yongcai Zhang,Yong Zhou,Zhigang Zou
Direct Z-scheme MgIn2S4/Bi2WO6 hierarchical heterostructures were simply fabricated via immobilising MgIn2S4 nanoflakes onto the surface of Bi2WO6 hierarchical nanosheet-like structures towards photocatalytic reduction of Cr(VI). The analyses of the energy band structure, UPS tests and DMPO-ESR spin-trap experiments confirm that the intimate MgIn2S4/Bi2WO6 heterointerface allows an efficient Z-scheme interfacial charge migration route between MgIn2S4 and Bi2WO6, leading to higher redox ability of photoexcited carriers, and thus favours the separation of photoexcited carriers, proved by the results of PL spectroscopy, photoluminescence decay traces, transient photocurrent densities and EIS. In addition, the MgIn2S4/Bi2WO6 heterostructures also exhibit obviously enhanced ultraviolet-visible-light absorption according to UV-vis DRS analysis, and can generate more electron–hole pairs under UV-visible light illumination, effectively improving the photocatalytic activity. Therefore, because of their synergistic effects, all the MgIn2S4/Bi2WO6 hierarchical heterostructures show distinctly improved photoreduction activities for Cr(VI), compared with pure Bi2WO6. The optimal hybrid (MIS/BWO-0.35) displays nearly 100% Cr(VI) reduction into Cr(III) after 40 min of simulated sunlight illumination, which is better than the majority of the reported Bi2WO6 and other semiconductor photocatalysts before. Its reaction rate constant for the photoreduction of Cr(VI) (0.1063 min−1) is about 4.5 times higher than that of the pristine Bi2WO6 (0.0237 min−1). This work provides a valid approach for developing efficient Z-scheme photocatalytic materials in removing Cr(VI).
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
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 29
·1-10
·
IF 2.8
Guo Jiao,Zhang Yin,Zhang Yakun,Shu Rui,Zhang Wei,Chen Aimin,Liu Pengfei,Wang Yuanyuan
The increasing amount of dye wastewater presented significant environmental and public health concerns, underscoring the urgent need to develop an eco-friendly, cost-effective, and sustainable approach to wastewater treatment. Photocatalytic technology is an ideal candidate for wastewater treatment due to its low pollution, high efficiency, and easy operation. In this work, a series of Sn-doped MgIn 2 S 4 photocatalysts were successfully prepared via the hydrothermal method. The 60%Sn–MgIn 2 S 4 showed the best photocatalytic activity, with a degradation rate of 62.5% for methyl orange (MO) over a 60-min driven by visible light. 60%Sn–MgIn 2 S 4 exhibited ideal stability, retaining 85% of its original degradation rate after four cycles of testing. Electrochemical impedance spectroscopy suggested that the 60%Sn–MgIn 2 S 4 possessed the ideal photogenerated charge migration rates. In addition, the photocatalytic active species-capture experiments showed that · O 2 – and · OH were the main active species for the photocatalytic degradation of MO over 60%Sn–MgIn 2 S 4 . This research provided a significant foundation for the development of MgIn 2 S 4 -based photocatalytic materials.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
CATALYSIS COMMUNICATIONS
·
2023
·
IF 3.7
Chunxin Zhang,Jing Ni,Ning Ding,Hong Liu
Composite MgIn 2 S 4 /Bi 2 O 3 was prepared and applied to the photocatalytic degradation of tetracycline (TC) under visible light. Results showed that formation of type-II heterojunction extended the visible light response range of the composite to 628 nm, effectively limiting the rapid recombination of photogenerated carriers. Further, the degradation experiment showed that TC was effectively decomposed by the composite. The main active substances for degrading TC were SO 4 · − , ·OH, h + and 1 O 2 . Cycling experiments showed that the TC removal rate by MgIn 2 S 4 /Bi 2 O 3 photocatalytic material was still as high as 75% after 4 cycles without any obvious changes in the crystalline phase structure.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Linbo Luo,Sheying Dong,Hao Chen,Huijia Jin,Tinglin Huang
The high recombination rate of photogenerated carriers limited the wide application of ternary metal sulfides with appropriate energy band structure and excellent light absorption properties. In this article, the microflower-like MgIn 2 S 4 /ZnIn 2 S 4 heterojunction was constructed to overcome the above faults. Various characterizations revealed that the loading of MgIn 2 S 4 provided more reactive sites for the photocatalytic reaction, and induced the generation of more photogenerated charge. Meanwhile, the heterostructure forming between MgIn 2 S 4 and ZnIn 2 S 4 significantly reduced the recombination rate of photogenerated carriers. For the 30% MgIn 2 S 4 /ZnIn 2 S 4 (MZ-30) composite, the removal efficiency of tetracycline hydrochloride (TCH) reached 96.21% under the optimal experimental conditions. Surprisingly, it still maintained high removal efficiencies both acidic and alkaline conditions. MgIn 2 S 4 /ZnIn 2 S 4 composite had the advantages like short removal time, wide pH application range, and could efficiently degrade a variety of antibiotics at the same time. Mass spectrometry analysis suggested that TCH molecules eventually turned into carbon dioxide and water by the ring-opening and functional group cracking reactions. Finally, the possible mechanism of photocatalytic degradation of TCH was proposed by combining the band position analysis and active species trapping test.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Xingrui Tong,Jinling Bao,Danfeng Chang,Dapeng Wang,Haibo Chang,Liquan Jing
Designing an efficient hole–electron separation method is essential to improving the photocatalytic efficiency of photocatalysts. Herein, we constructed a 3D MoS2/MgIn2S4 S-scheme heterojunction material using a solvothermal method. The built-in electric field formed by the interaction between MoS2 and MgIn2S4 promoted the separation of electrons and holes, significantly improving the photocatalytic activity of 3D MoS2/MgIn2S4. The 3% MoS2/MgIn2S4 composite photocatalyst successfully achieved a 100% reduction of Cr(VI) within 90 min and demonstrated good hydrogen production efficiency without using a sacrificial agent. Theoretical calculations confirmed the formation of S-scheme heterojunctions. Malondialdehyde and dehydrogenase tests showed that the Cr(VI) solution after reduction was not harmful to plant growth. Furthermore, we systematically investigated the effects of different Cr(VI) concentrations, catalyst dosages, ions, pH values, and organic acids on photocatalytic efficiency. The design of the S-scheme heterojunction photocatalysts provided a promising strategy for the photoreduction of Cr(VI).
研究领域:
环境科学
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材料科学
·
化学工程
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DOI
高影响因子
JOURNAL OF CATALYSIS
·
2017
·
IF 6.844
Wei Chen,Yu-Xiang Hua,Ying Wang,Ting Huang,Tian-Yu Liu,Xiao-Heng Liu
A series of novel visible-light-driven MgIn 2 S 4 /g-C 3 N 4 (MISCN) heterostructures were fabricated in situ by a simple one-pot hydrothermal method. The synthesis of the MgIn 2 S 4 (MIS) nanoplates and the construction of intimate interfacial contacts by loading MIS nanoplates onto mesoporous g-C 3 N 4 (CN) nanosheets were achieved simultaneously in a hydrothermal environment. Systematic characterization, including powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), UV–vis diffuse reflection spectroscopy (UV–vis DRS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), Brunauer–Emmett–Teller (BET), X-ray photoelectron spectroscopy (XPS), and photoelectrochemical measurements were employed to analyze the phase structure, chemical composition, absorption properties, microstructure, and photocatalytic mechanism. The as-prepared MISCN photocatalysts exhibit improved photocatalytic activity for 4-nitroaniline (4-NA) reduction and methyl orange (MO) degradation as compared with pure MIS nanoplates and pristine CN nanosheets under visible light irradiation. The enhancement of photocatalytic performance can be attributed to faster charge separation and transport benefitting from the construction of tight heterogeneous interfaces and band offset structure between MIS nanoplates and mesoporous CN nanosheets. This investigation may be extended to explore and fabricate the novel and highly efficient visible-light-driven g-C 3 N 4 -based heterostructures for organic transformations and pollutant removal.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jinxing Yu,Peiyi Yan,Feng Chen,Shu Jin,Xiaoxiang Xu,Jun Qian
Semiconductor-based photocatalytic techniques provide a durable and environmentally benign route to disinfect microbes. However, their disinfection activities are often limited by inadequate use of photocarriers (e − and h + ), particularly for narrow bandgap semiconductors. Here, we directly grow narrow bandgap semiconductor MgIn 2 S 4 onto In 2 O 3 to fabricate MgIn 2 S 4 @In 2 O 3 hierarchical tubular heterostructures. Using the model microbes Escherichia coli bacteria, we demonstrate that MgIn 2 S 4 @In 2 O 3 can achieve an exceptionally high antimicrobial activity (7 log reduction in viable cells count for 30 min illumination) although MgIn 2 S 4 and In 2 O 3 alone are almost inactive. Owing to the intimate contact between MgIn 2 S 4 and In 2 O 3 , MgIn 2 S 4 @In 2 O 3 enables efficient photocarrier separation which supports continuous production of copious reactive species ( i.e. h + and O 2 − ) for disinfection. Numerical simulation indicates that photocarriers are spatially well-separated in MgIn 2 S 4 @In 2 O 3 due to the type-II heterojunction formed. These findings signify the possibility to achieve high antimicrobial activity from otherwise almost inactive semiconductors by properly constructing the heterogeneous interfaces.
研究领域:
光催化材料
·
纳米医学
·
环境微生物学
·
生物材料学
·
分子影像学
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DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 2
·1-8
·
IF 5.3
Xu Kun,Dai Li,Du Yu,Liu Lei,Zhang Nuo,Feng Ruiqing,Xu Rui,Wei Qin
A photoelectrochemical (PEC) immunosensor was designed based on MgIn 2 S 4 -decorated inorganic halide perovskite CsPbBr 3 combined with the signal polarity conversion strategy for neuron-specific enolase (NSE) detection. CsPbBr 3 was applied as the basic photoactive material owing to its excellent optical and electronic properties, which provide a good PEC performance for sensor construction. In order to improve the stability of this perovskite, the three-dimensional flower-like MgIn 2 S 4 with a desirable direct band gap was applied to enhance the PEC response. Also, the excellent structure of MgIn 2 S 4 provides large surface-active sites for CsPbBr 3 loaded. For enhancing the detection sensitivity of PEC immunosensor, p-type CuInS 2 was used as a signal probe which fixed on detection antibody (Ab 2 ). When the target NSE was present, the photogenerated electrons produced by CuInS 2 were transferred to the test solution, and the polarity of PEC signal changes. Based on the above photosensitive materials and signal conversion strategy, the proposed PEC immunosensor showed favorable detection performance, and the linear detection range is 0.0001 ~ 100 ng/mL with a 38 fg/mL of detection limit. The proposed strategy improved the adhibition of CsPbBr 3 in the analytical chemistry field as well as provided a reference method for other protein detections. Graphical Abstract
CAS / MDL:
研究领域:
生物医学工程
·
分析化学
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产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2019
·
IF 9.518
Liwei Yang,Xiaoqiang Liu,Lele Li,Si Zhang,Hejie Zheng,Yunfei Tang,Huangxian Ju
This work designed a MgIn 2 S 4 -TiONA heterojunction by growing MgIn 2 S 4 nanoplates on TiO 2 nanowire array (TiONA) for preparation of visible light photoelectrochemical (PEC) sensing platform. The heterojunction exhibited strong absorption of visible light, large surface area and high loading of biomolecules , leading to high sensing sensitivity. Using adenosine triphosphate (ATP), a marker of cell vitality, as the target model, a PEC sandwich aptasensor was constructed by immobilizing capture DNA 1 on MgIn 2 S 4 surface. In the presence of ATP and signal DNA 2 with terminal ferrocene as the electron donor , a sandwiched DNA 1 -ATP-DNA 2 complex could be formed on the PEC aptasensor. The aptasensor showed excellent performance with a wide linear range from 50 fM to 100 nM and a detection limit of 20 fM. The sensing performance including specificity, reproducibility, stability and practical use were also evaluated, showing promising application of the MgIn 2 S 4 -TiONA heterojunction in PEC biosensing.
研究领域:
分析化学
·
生物传感器
·
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Lina Wang,Peiyi Yan,Huairui Chen,Zhuo Li,Shu Jin,Xiaoxiang Xu,Jun Qian
Narrow bandgap semiconductor MgIn 2 S 4 has been readily grown onto In 2 O 3 nanofibers by an in situ growing method. The so-formed MgIn 2 S 4 -In 2 O 3 hybrid nanofibers are characterized by strong visible light absorption and intimate MgIn 2 S 4 /In 2 O 3 heterointerfaces. Under visible light illumination ( λ ≥ 400 nm), the hybrid nanofibers demonstrate an exceptionally high photocatalytic activity for Escherichia coli ( E. coli ) disinfection, outcompeting pristine MgIn 2 S 4 , naked In 2 O 3 nanofibers, and many other photocatalytic systems reported. Specifically, the hybrid nanofibers achieve a 7 log reduction in viable cells for merely 20 min illumination while pristine MgIn 2 S 4 and naked In 2 O 3 nanofibers alone are almost inactive. Further analysis indicates that the hybrid nanofibers essentially form a type-II semiconductor heterojunctions which enable spatial separation of photocarriers. Owing to the intimate heterointerfaces, photocarriers can be promptly separated and accumulated respectively in In 2 O 3 and MgIn 2 S 4 thereby allowing continuous generation of copious reactive species for disinfection. This work signifies the usefulness of heterointerfaces in promoting photocarrier separation and provides a useful strategy to upgrade photocatalytic performance from otherwise almost inactive semiconductors.
研究领域:
材料科学
·
光催化
·
纳米材料
·
环境科学
·
微生物学
✓ 已验证
DOI
高影响因子
TALANTA
·
2025
·
IF 6.1
Linzi Huang,Yuhui Qiu,Xiaoqian Sun,Kunxiang Deng,Xinyi Li,Yixi Xie,Pengcheng Zhao,Junjie Fei
Tert-butylhydroquinone (TBHQ) is a common antioxidant in food oils, and reliable detection methods are needed to ensure food safety. Here, a photoelectrochemical (PEC) sensor based on Bi 2 O 3 /MgIn 2 S 4 /GCE was developed for the detection of TBHQ. The sensor performance was significantly enhanced through electrostatic assembly of sheet-like Bi 2 O 3 onto flower-like MgIn 2 S 4 , forming a type-II heterojunction with carefully controlled component ratios, pH, and applied potential. The improved detection capability is attributed to the synergistic effect of the heterojunction structure. Furthermore, the selectivity of the sensor towards TBHQ was elucidated through the study of electrostatic interactions and redox potentials. The detection limit of the developed Bi 2 O 3 /MgIn 2 S 4 /GCE sensor was as low as 9 nM with two linear ranges (0.03–0.18 μM and 0.18–60 μM). Its effectiveness in monitoring food safety has been demonstrated by successful uses in blend oils and soybean oils.
研究领域:
分析化学
·
食品安全
·
材料科学
·
光电化学
·
传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）