JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Yibin Song,Yanmei Guo,Shaopeng Qi,Ke Zhang,Jinfan Yang,Bingnan Li,Jinxi Chen,Yixin Zhao,Yongbing Lou
Heterojunction has been considered to be one of the most effective methods for efficient hydrogen evolution reaction by photocatalytic water splitting. In this work, nanostructured Cu 7 S 4 /MnIn 2 S 4 heterojunction was successfully fabricated via a simple two-step method, which was much simpler than most heterojunction synthesis. Firstly, Cu 7 S 4 nanoparticles were synthesized by oil bath stirring, and then the Cu 7 S 4 /MnIn 2 S 4 heterojunctions were synthesized by the hydrothermal method . The prepared Cu 7 S 4 /MnIn 2 S 4 composite exhibited significantly improved hydrogen evolution activity with a rate of 13.81 μmol h −1 (10 mg catalyst), which was approximately 18 times higher than that of pristine MnIn 2 S 4 . This result could be attributed to the construction of p-n heterojunction for promoting the separation of photogenerated charge carriers and inhibiting their recombination. Possible electron transfer mechanism was proposed by the related characterization. This work will inspire the simple fabrication of nano-heterojunctions in the future.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Jie Zhao,Dequan Zhou,Qiang He,Jian Zhang,Binghua Yao
Piezoelectric catalysis is a recently developed eco-friendly approach for the treatment of pollutant. In this study, a piezoelectric catalytic system of manganese indium sulphide (MnIn 2 S 4 ) was constructed for eliminating oxytetracycline (OTC) residues. X-ray diffraction and Scanning electron microscopy showed that MnIn 2 S 4 microspheres with a grain size of 3–5 μm could be hydrothermally produced. Brunauer–Emmett–Teller analysis showed that the specific surface area of the MnIn 2 S 4 sample was 26.6 m 2 ·g −1 , and the average pore size was 20.2 nm. The electrochemical performance test showed that the piezoelectric response current of the MnIn 2 S 4 sample was 0.35 × 10 −6 A. Using OTC as a degradation model, the piezoelectric catalytic performance of MnIn 2 S 4 was explored. The results showed that the maximum degradation efficiency of the OTC could reach 82.2 % after 60 min while the piezoelectric power was 455 W, the pH of the reaction system was 4, the OTC concentration was 0.02 mM, and the MnIn 2 S 4 dosage was 1.4 g·L −1 . During the piezoelectric catalytic process, the main active species were identified as h + , 1 O 2 , and •OH. Meanwhile, eight intermediate products of OTC and three possible degradation pathways were found. This study is important for exploring the application of sulfide-based piezoelectric catalytic materials in wastewater treatment.
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 ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Xin Xiao,Yaoting Wang,Huimin Zhang,Zhiling Chou,Haochen Ding,Xinyu Lu,Yiming Zou,Li Chen,Dongping Sun
This study investigated the controllable synthesis method and photocatalytic performance of a g-C 3 N 4 /MnIn 2 S 4 heterostructure. Through a carefully designed experimental scheme, the g-C 3 N 4 /MnIn 2 S 4 heterostructure was successfully prepared, and its composition, structure, and morphology were thoroughly characterized. The experimental results demonstrated that the heterostructure achieved a high photodegradation efficiency of 92.3% for RhB and 72.8% for TC under visible light, significantly outperforming its individual components. After four cycles, the degradation rate remained relatively stable. The photocatalytic reaction mechanism was thoroughly investigated by adding different trapping agents, revealing that the active species were mainly ·O₂⁻ and h⁺ and EPR, which significantly affected the degradation efficiency. The g-C 3 N 4 /MnIn 2 S 4 heterostructure achieved efficient separation of the photogenerated carriers, significantly enhancing its photocatalytic performance for RhB and tetracycline degradation. VB-XPS tests exhibited that the valence bands of MnIn 2 S 4 and g-C 3 N 4 were 1.25 and 2.25 eV, respectively. Combined with UV-vis DRS results, the calculated conduction bands are -0.79 and -0.53 eV, respectively. The study found that efficient separation between photogenerated holes and electrons in the heterostructure had a crucial impact on its photocatalytic performance.
研究领域:
材料科学
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环境科学
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化学
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Jiajun Li,Zheng Liu,Wei Li,Hongyu Ma,Pengfei Fang,Rui Xiong,Chunxu Pan,Jianhong Wei
Three-dimensional hollow tube-like structures have obtained considerable attention owing to their pronounced advantages in photocatalytic reactions. Herein, metal organic framework (MOF)-derived MnIn 2 S 4 @In 2 S 3 with hollow tube-like structure was successfully synthesized through a facial hydrothermal combined solvothermal method. Electron spin resonance technology and radical scavengers verified that holes and superoxide anions are the primary reactive species in the photocatalytic reaction. The resulting hollow tube-like MnIn 2 S 4 @In 2 S 3 (MnIS) composite exhibits superior H 2 O 2 yield and ofloxacin photodegradation performance, which are much higher than those of pure MnIn 2 S 4 and In 2 S 3 samples. The experimental results along with density functional theory (DFT) calculations indicate that the co-sharing of In and S elements in MnIn 2 S 4 and In 2 S 3 within the MnIS composites induces strong interface interactions. Additionally, the generation and decomposition of H 2 O 2 provide more active sites, thereby facilitating the photodegradation of ofloxacin. Meanwhile, the formation of an S-scheme heterojunction between MnIn 2 S 4 and In 2 S 3 promotes swifter charge separation and transfer, leading to superior performance in terms of H 2 O 2 evolution and ofloxacin degradation. This investigation offers a novel insight by co-constructing MOF-derived hollow nanotubes and heterojunctions for achieving highly efficient photocatalytic solar-to-fuels conversion.
研究领域:
材料科学
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环境科学
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化学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2018
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IF 6.735
Wei Chen,Zhi-Cai He,Guo-Bo Huang,Cheng-Lin Wu,Wu-Fei Chen,Xiao-Heng Liu
Semiconductor photocatalysis has been regarded as an environmentally friendly technology in wastewater treatment and energy production. Here, a series of direct Z-scheme MnIn 2 S 4 /g-C 3 N 4 (MnISCN) photocatalysts without electron mediators were fabricated by a simple hydrothermal route on the basis of in-situ loading of MnIn 2 S 4 (MnIS) nanoflakes on the surface of g-C 3 N 4 (CN) nanosheets. Photocatalytic performances evaluated under visible light irradiation revealed these Z-scheme heterostructured photocatalysts exhibited higher photocatalytic activities than single-component samples. The effect of weight ratio between MnIn 2 S 4 nanoflakes and mesoporous CN nanosheets on photocatalytic activity towards treatment of pharmaceutical wastewater was optimized to achieve highly efficient photocatalytic activities for both degradation of pharmaceutical wastewater and hydrogen generation compared with alone MnIS nanoflakes and isolated mesoporous CN nanosheets. The significant enhancement in photocatalytic activity could be primarily ascribed to the construction of Z-scheme MnISCN architectures, which effectively accelerated the transfer and separation of photogenerated charge carriers via tight interface contacts built among these two components. The recycling experiments for pharmaceutical wastewater treatment revealed the excellent stability of MnISCN nanocomposites. The advantages of highly efficient photocatalytic activity and excellent stability endowed a promising potential for MnISCN nanocomposites to apply in photocatalytic fields.
研究领域:
材料科学
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环境科学
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能源科学
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高影响因子
Nanoscale Advances
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2020
·Vol. 3
·期 3
·812-822
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IF 0
Min Zhang,Muhammad Arif,Yuxiang Hua,Bo Qiu,Yue Mao,Xiaoheng Liu
The use of semiconductor photocatalysts to generate electrons with efficient reducing capability for organic photoreduction synthesis and the removal of harmful substances has become a hotspot in the field of green chemistry research. In this work, α-MnO2 nanocubes and α-MnO2@MnIn2S4 hybrid photocatalysts with a core–shell structure were synthesized successively by a two-step method. XRD and XPS verified the coexistence of the two substances (α-MnO2 and MnIn2S4) in hybrid systems. According to the SEM and TEM characterization, it is clearly seen that MnIn2S4 nanosheets grow on α-MnO2 nanocubes to form a hierarchical structure. Furthermore, HRTEM showed that the interface contact between α-MnO2 and MnIn2S4 resulted in an atomically defined junction. The photocatalytic performance of the composite catalyst was evaluated by reducing 4-nitroaniline to 4-phenylenediamine and Cr(VI) to Cr(III), respectively. The results show that the catalytic activity of the composite material is effectively improved compared to that of the single components. The Z-scheme electron transport mechanism was proved by ultraviolet-visible diffuse reflectance spectroscopy, valence band XPS, energy band structure calculation and active species detection experiments. The constructed Z-scheme hierarchical α-MnO2@MnIn2S4 system with an atomically defined junction can improve the redox performance of semiconductors for organic synthesis and environmental remediation.
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PubMed
APPLIED SURFACE SCIENCE
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2026
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IF 6.6
Guangyuan Chen,Qina Quan,Chenyang Lin,Shijian Zhou,Yan Kong
Tetracycline (TC), as a persistent and widely detected antibiotic pollutant, poses severe ecotoxicological risks and necessitates rapid and efficient degradation strategies. Here, we demonstrate a photocatalytic self-Fenton process in which H 2 O 2 produced via visible-light-driven oxygen reduction is directly activated by Fe species for the rapid degradation of TC. To enable efficient H 2 O 2 production, a ternary ZnIn 2 S 4 / CdIn 2 S 4 /MnIn 2 S 4 (denoted as ZC 0.3 M 0.05 ) heterojunction photocatalyst was rationally constructed via a one-pot hydrothermal method. Structural analyses reveal that the three sulfides form a tightly coupled, multi-interfacial nanoscale architecture that induces pronounced interfacial strain and charge polarisation. Consequently, ZC 0.3 M 0.05 delivers a high H 2 O 2 production rate of 4907.7 μmol g⁻ 1 h⁻ 1 , outperforming pristine ZnIn 2 S 4 , CdIn 2 S 4 and MnIn 2 S 4 by factors of 15.2, 10.7 and 13.6, respectively. Upon Fe addition, the in situ generated H 2 O 2 enabled rapid self-Fenton degradation of TC, achieving 91.9 % removal within 5 min, while maintaining high activity under simulated environmental conditions. Combined spectroscopic, electrochemical and theoretical analyses reveal that work-function-difference-driven and stepwise electron-transfer pathways (MnIn 2 S 4 → ZnIn 2 S 4 → CdIn 2 S 4 ) across multiple heterointerfaces facilitate efficient charge separation and O 2 -to-*O 2 ⁻ electron injection. This work establishes a materials framework for on-demand H 2 O 2 production and direct self-Fenton pollutant remediation, and offers general design principles for high-performance ternary metal sulfide heterojunctions.
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高影响因子
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