A visible-light-driven Z-scheme CdS/Bi12GeO20 heterostructure with enhanced photocatalytic degradation of various organics and the reduction of aqueous Cr(VI)

Ruan, Xiaowen; Hu, Hao; Che, Huinan; Jiang, Enhui; Zhang, Xiaoxu; Liu, Chunbo; Che, Guangbo

doi:10.1016/j.jcis.2019.02.052

Cited by 74 publications

(14 citation statements)

References 57 publications

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“…On the contrary, two different peaks are unexpectedly similar to the binding energies of Bi 3+ at 159.10 and 164.30 eV in the 0.1% CuS/Bi 2 WO 6 heterostructure (Figure 2e). It may be because the binding energy of S 2− is very similar to that of Bi 3+ [39]. The XRD and XPS results implied that 0.1% CuS/Bi 2 WO 6 heterostructure was authentically obtained.…”

Section: Resultsmentioning

confidence: 99%

2D In-Plane CuS/Bi2WO6 p-n Heterostructures with Promoted Visible-Light-Driven Photo-Fenton Degradation Performance

et al. 2019

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Photo-Fenton degradation of pollutants in wastewater is an ideal choice for large scale practical applications. Herein, two-dimensional (2D) in-plane CuS/Bi2WO6 p-n heterostructures have been successfully constructed by an in situ assembly strategy and characterized using XRD, XPS, SEM/TEM, EDX, UV-Vis-DRS, PL, TR-PL, ESR, and VB-XPS techniques. The XPS and the TEM results confirm the formation of CuS/Bi2WO6 heterostructures. The as-constructed CuS/Bi2WO6 showed excellent absorption in visible region and superior charge carrier separation efficiency due to the formation of a type-II heterojunctions. Under visible light irradiation, 0.1% CuS/Bi2WO6 heterostructure exhibited the best photo-Fenton-like catalytic performance. The degradation efficiency of Rhodamine B (RhB, 20 mg·L−1) can reach nearly 100% within 25 min, the apparent rate constant (kapp/min−1) is approximately 40.06 and 3.87 times higher than that of pure CuS and Bi2WO6, respectively. The degradation efficiency of tetracycline hydrochloride (TC-HCl, 40mg·L−1) can reach 73% in 50 min by employing 0.1% CuS/Bi2WO6 heterostructure as a photo-Fenton-like catalyst. The promoted photo-Fenton catalytic activity of CuS/Bi2WO6 p-n heterostructures is partly ascribed to its low carriers recombination rate. Importantly, CuS in CuS/Bi2WO6 heterostructures is conducive to the formation of heterogeneous photo-Fenton catalytic system, in which Bi2WO6 provides a strong reaction site for CuS to avoid the loss of Cu2+ in Fenton reaction, resulting in its excellent stability and reusability. The possible photo-Fenton-like catalytic degradation mechanism of RhB and TC-HCl was also elucidated on the basis of energy band structure analysis and radical scavenger experiments. The present study provides strong evidence for CuS/Bi2WO6 heterostructures to be used as promising candidates for photo-Fenton treatment of organic pollutants.

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Section: Resultsmentioning

confidence: 99%

2D In-Plane CuS/Bi2WO6 p-n Heterostructures with Promoted Visible-Light-Driven Photo-Fenton Degradation Performance

et al. 2019

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“…This suppresses the recombination of electron and holes, which in turn accelerates the photoreduction of Cr (VI) [48]. The same reasoning has been used in other research, where the photoreduction of Cr (VI) was accompanied by the degradation of various types of organic pollutants to sustain the reaction, such as 2-Mercaptobenzothiazole (MBT) [156], sulfamethoxazole [157], RhB [98,136], and chlorinated phenols [158]. The photoreduction of both Pb (II) and Cu (II) was attempted together with the photodegradation of RhB while using a modified Chitosan-Gelatin @ zirconium (IV) selenophosphate nanocomposite ion exchanger.…”

Section: Recent Progress and Performance Evaluationmentioning

confidence: 99%

The Roles of Nanomaterials in Conventional and Emerging Technologies for Heavy Metal Removal: A State-of-the-Art Review

et al. 2019

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Heavy metal (HM) pollution in waterways is a serious threat towards global water security, as high dosages of HM poisoning can significantly harm all living organisms. Researchers have developed promising methods to isolate, separate, or reduce these HMs from water bodies to overcome this. This includes techniques, such as adsorption, photocatalysis, and membrane removal. Nanomaterials play an integral role in all of these remediation techniques. Nanomaterials of different shapes have been atomically designed via various synthesis techniques, such as hydrothermal, wet chemical synthesis, and so on to develop unique nanomaterials with exceptional properties, including high surface area and porosity, modified surface charge, increment in active sites, enhanced photocatalytic efficiency, and improved HM removal selectivity. In this work, a comprehensive review on the role that nanomaterials play in removing HM from waterways. The unique characteristics of the nanomaterials, synthesis technique, and removal principles are presented. A detailed visualisation of HM removal performances and the mechanisms behind this improvement is also detailed. Finally, the future directions for the development of nanomaterials are highlighted.

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“…[35][36][37] Nevertheless, in actual application, CdS nanoparticles still have drawbacks, such as photo corrosion and a tendency to agglomeration solution. 38,39 The large specic surface area of reduced graphene (RGO) can effectively disperse nanoparticles, reduce the agglomeration of active semiconductor components, and increase the effective active sites that of anchoring pollutants. [40][41][42][43] Moreover, the unique pore structure and electronic properties of RGO provide fast electron transport channels for materials, and these improve the forward migration index of photogenerated carriers and electrical conductivity.…”

Section: Introductionmentioning

confidence: 99%

Microwave-assisted synthesis of an RGO/CdS/TiO₂step-scheme with exposed TiO₂{001} facets and enhanced visible photocatalytic activity

Shi

et al. 2020

RSC Adv.

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A visible-light-driven Z-scheme CdS/Bi12GeO20 heterostructure with enhanced photocatalytic degradation of various organics and the reduction of aqueous Cr(VI)

Cited by 74 publications

References 57 publications

2D In-Plane CuS/Bi2WO6 p-n Heterostructures with Promoted Visible-Light-Driven Photo-Fenton Degradation Performance

2D In-Plane CuS/Bi2WO6 p-n Heterostructures with Promoted Visible-Light-Driven Photo-Fenton Degradation Performance

The Roles of Nanomaterials in Conventional and Emerging Technologies for Heavy Metal Removal: A State-of-the-Art Review

Microwave-assisted synthesis of an RGO/CdS/TiO₂step-scheme with exposed TiO₂{001} facets and enhanced visible photocatalytic activity

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A visible-light-driven Z-scheme CdS/Bi12GeO20 heterostructure with enhanced photocatalytic degradation of various organics and the reduction of aqueous Cr(VI)

Cited by 74 publications

References 57 publications

2D In-Plane CuS/Bi2WO6 p-n Heterostructures with Promoted Visible-Light-Driven Photo-Fenton Degradation Performance

2D In-Plane CuS/Bi2WO6 p-n Heterostructures with Promoted Visible-Light-Driven Photo-Fenton Degradation Performance

The Roles of Nanomaterials in Conventional and Emerging Technologies for Heavy Metal Removal: A State-of-the-Art Review

Microwave-assisted synthesis of an RGO/CdS/TiO2step-scheme with exposed TiO2{001} facets and enhanced visible photocatalytic activity

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Microwave-assisted synthesis of an RGO/CdS/TiO₂step-scheme with exposed TiO₂{001} facets and enhanced visible photocatalytic activity