Simulated-sunlight-driven Cr(<scp>vi</scp>) reduction on a type-II heterostructured Sb<sub>2</sub>S<sub>3</sub>/CdS photocatalyst

Zhu, Zhenyu; Li, Jiayuan; Li, Wei; Liu, Xiaoyun; Dang, Yanyan; Ma, Teng-hao; Wang, Chuanyi

doi:10.1039/d2en00050d

Cited by 18 publications

(10 citation statements)

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“…Sampling and detecting the Cr(VI) concentration in a given time by diphenyl carbonate (DPC) spectrometry method. [ 13 ] Then, the Cr(VI) reduction photoactivities at different pH values were also investigated by adjusting the pH value of Cr(VI) aqueous solution. All the above experiments were repeated three times to obtain the corresponding error limits.…”

Section: Methodsmentioning

confidence: 99%

“…[11] Comparatively, cadmium sulfide (CdS) generally possesses high-performance photoactivity due to its suitable size and band structure. [12] In our previous study, [13] it was found that immobilizing CdS nanoparticles (NPs) on the surface of Sb 2 S 3 nanorods (NRs) can significantly improve the Cr(VI) reduction photoactivity. However, the very small contact area at the Sb 2 S 3 /CdS heterointerface led to weak interfacial interaction, resulting in unstable microstructure and limited promotion/suppression effect for separation/recombination kinetics of photoexcitons.…”

Section: Introductionmentioning

confidence: 99%

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Construction of Core–shell Sb₂s₃@Cds Nanorod with Enhanced Heterointerface Interaction for Chromium‐Containing Wastewater Treatment

et al. 2023

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How to collaboratively reduce Cr(VI) and break Cr(III) complexes is a technical challenge to solve chromium‐containing wastewater (CCW) pollution. Solar photovoltaic (SPV) technology based on semiconductor materials is a potential strategy to solve this issue. Sb2S3 is a typical semiconductor material with total visible‐light harvesting capacity, but its large‐sized structure highly aggravates disordered photoexciton migration, accelerating the recombination kinetics and resulting low‐efficient photon utilization. Herein, the uniform mesoporous CdS shell is in situ formed on the surface of Sb2S3 nanorods (NRs) to construct the core–shell Sb2S3@CdS heterojunction with high BET surface area and excellent near‐infrared light harvesting capacity via a surface cationic displacement strategy, and density functional theory thermodynamically explains the breaking of SbS bonds and formation of CdS bonds according to the bond energy calculation. The SbSCd bonding interaction and van der Waals force significantly enhance the stability and synergy of Sb2S3/CdS heterointerface throughout the entire surface of Sb2S3 NRs, promoting the Sb2S3‐to‐CdS electron transfer due to the formation of built‐in electric field. Therefore, the optimized Sb2S3@CdS catalyst achieves highly enhanced simulated sunlight‐driven Cr(VI) reduction (0.154 min−1) and decomplexation of complexed Cr(III) in weakly acidic condition, resulting effective CCW treatment under co‐action of photoexcited electrons and active radicals. This study provides a high‐performance heterostructured catalyst for effective CCW treatment by SPV technology.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Construction of Core–shell Sb₂s₃@Cds Nanorod with Enhanced Heterointerface Interaction for Chromium‐Containing Wastewater Treatment

et al. 2023

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“…This was because that abundant H + could prevent catalyst from adsorbing Cr(VI), thereby hinder the efficient reduction of Cr(VI). [36,37]…”

Section: Evaluation Of Photocatalytic Activitiesmentioning

confidence: 99%

Synthesis of Zn_0.1Sn_0.1Cd_0.8S_x Solid Solutions for Photocatalytic Reduction of Cr(VI): Bandgap Structure and Sulfur Vacancy Regulation

Zhang

Liu

et al. 2023

Chemistry An Asian Journal

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Ternary metal sulfides (TMSs) solid solutions have been regarded as ideal semiconductors in various photocatalytic reactions due to their outstanding redox reversibility, high electron conductivity, and great stability. In this work, a series of Zn 0.1 Sn 0.1 Cd 0.8 S x (ZSCS) solid solutions were synthesized by a simple hydrothermal method and applied in the photocatalytic reduction of Cr(VI). The Cr(VI) reduction efficiency of ZSCS-5 quickly reached nearly 100% within 3 min under visible light irradiation. The controlling of sulfur content in ZSCS induced the transformation of cubic to hexagonal CdS, regulating the energy band structure and sulfur vacancy (S V ) content, both of which further influenced the redox properties of ZSCS samples. The more negative conduction band position and more sulfur vacancies contributed to the enhanced photocatalytic reduction performance of ZSCS-5 toward Cr(VI). The active species e À , h + , O 2 *À and 1 O 2 were all involved and h + played a pivotal role in the photocatalytic reaction. This work provided an excellent photocatalyst for reduction of Cr(VI) and strongly confirmed the regulation of energy band structure and sulfur vacancies in photocatalysts through controlling the precursor content.

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“…[3,4] Photocatalytic hydrogen production is an environmentally friendly and economical semi-catalytic reaction using solar energy to decompose water into hydrogen energy. [5,6] At present, the development of appropriate semiconductor materials to improve the utilization of photoelectrons is a major challenge for photocatalytic hydrogen production from water decomposition. This requires not only an appropriate decomposition band structure but also the requirements of high efficiency, low cost, and high stability as catalysts.…”

Section: Introductionmentioning

confidence: 99%

Graphdiyne (g‐C_nH_2n−2)‐Supported Organic–Inorganic Composites with Zinc Cadmium Sulfide for Photocatalytic Hydrogen Evolution

Jin

2022

Solar RRL

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As a new 2D carbon hybrid material, graphdiyne (GD) has attracted much attention due to its good conductivity, adjustable electronic structure, and special electron transfer enhancement properties. Due to its special properties, it has great potential in the field of photocatalytic hydrogen evolution. Considering the modification of GD from the perspective of nano size and bandgap matching, CuS@GDY hybrids to modify ZnCdS are introduced, and the sheet hybrid improved ZnCdS nanoparticles' dispersion. From another point of view, GD not only enhances the optical absorption of the composite but also acts as the main reduction site. Meanwhile, when GD appears in ZnCdS/CuS heterojunction in the form of an electronic bridge, the separation efficiency of photoinduced carriers in ternary system is greatly improved. Finally, the charge transfer mode of the composite system assisted by GD through radical trapping and in situ X‐ray photoelectron spectroscopy experiments are analyzed and verified. The ternary hybrid ZnCdS/CuS@GD prepared in this experiment has excellent photoelectrochemical properties and stability. The design idea and characterization analysis of this article can provide reference and reference value for further research of graphite acetylene in the field of photocatalysis.

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Simulated-sunlight-driven Cr(vi) reduction on a type-II heterostructured Sb₂S₃/CdS photocatalyst

Abstract: Photocatalysis technology is a promising strategy to solve the pollution of Cr(VI) wastewater. Transition metal sulfides (TMSs) are identified as a kind of important photocatalytic materials, but they are easy...

Cited by 18 publications

References 52 publications

Construction of Core–shell Sb₂s₃@Cds Nanorod with Enhanced Heterointerface Interaction for Chromium‐Containing Wastewater Treatment

Construction of Core–shell Sb₂s₃@Cds Nanorod with Enhanced Heterointerface Interaction for Chromium‐Containing Wastewater Treatment

Synthesis of Zn_0.1Sn_0.1Cd_0.8S_x Solid Solutions for Photocatalytic Reduction of Cr(VI): Bandgap Structure and Sulfur Vacancy Regulation

Graphdiyne (g‐C_nH_2n−2)‐Supported Organic–Inorganic Composites with Zinc Cadmium Sulfide for Photocatalytic Hydrogen Evolution

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Simulated-sunlight-driven Cr(vi) reduction on a type-II heterostructured Sb2S3/CdS photocatalyst

Abstract: Photocatalysis technology is a promising strategy to solve the pollution of Cr(VI) wastewater. Transition metal sulfides (TMSs) are identified as a kind of important photocatalytic materials, but they are easy...

Cited by 18 publications

References 52 publications

Construction of Core–shell Sb2s3@Cds Nanorod with Enhanced Heterointerface Interaction for Chromium‐Containing Wastewater Treatment

Construction of Core–shell Sb2s3@Cds Nanorod with Enhanced Heterointerface Interaction for Chromium‐Containing Wastewater Treatment

Synthesis of Zn0.1Sn0.1Cd0.8Sx Solid Solutions for Photocatalytic Reduction of Cr(VI): Bandgap Structure and Sulfur Vacancy Regulation

Graphdiyne (g‐CnH2n−2)‐Supported Organic–Inorganic Composites with Zinc Cadmium Sulfide for Photocatalytic Hydrogen Evolution

Contact Info

Product

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Simulated-sunlight-driven Cr(vi) reduction on a type-II heterostructured Sb₂S₃/CdS photocatalyst

Construction of Core–shell Sb₂s₃@Cds Nanorod with Enhanced Heterointerface Interaction for Chromium‐Containing Wastewater Treatment

Construction of Core–shell Sb₂s₃@Cds Nanorod with Enhanced Heterointerface Interaction for Chromium‐Containing Wastewater Treatment

Synthesis of Zn_0.1Sn_0.1Cd_0.8S_x Solid Solutions for Photocatalytic Reduction of Cr(VI): Bandgap Structure and Sulfur Vacancy Regulation

Graphdiyne (g‐C_nH_2n−2)‐Supported Organic–Inorganic Composites with Zinc Cadmium Sulfide for Photocatalytic Hydrogen Evolution