Enhanced visible light photoreduction of aqueous Cr(VI) by Ag/Bi4O7/g-C3N4 nanosheets ternary metal/non-metal Z-scheme heterojunction

Ye, Mao; Wei, Wei; Zheng, Lihua; Liu, Yuze; Wu, Dewei; Gu, Xiangyu; Wei, Anne

doi:10.1016/j.jhazmat.2018.11.069

Cited by 83 publications

(12 citation statements)

References 43 publications

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“…In situ photo-deposition experiments are often performed to locate the accumulation sites of photoexcited electrons and holes, where reduction and oxidation reactions take place, respectively. Specifically, noble metal nanoparticles (NPs) are loaded onto the semiconductor surface using the common metal precursors such as HAuCl 4 , 35 H 2 PtCl 6 , 36,37 and AgNO 3 , 38 with water as the hole scavenger to track the charge transfer through photo-deposition. The locations of noble metal NPs mark the enrichment sites for photoexcited electrons since they are prepared by photoreduction accompanied by water photooxidation to eliminate the holes in light of reactions ( 7) and ( 8).…”

Section: Surface Photo-redox Reactionsmentioning

confidence: 99%

Probing interfacial charge transfer in heterojunctions for photocatalysis

Gong

Wang

et al. 2022

Phys. Chem. Chem. Phys.

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Section: Surface Photo-redox Reactionsmentioning

confidence: 99%

Probing interfacial charge transfer in heterojunctions for photocatalysis

Gong

Wang

et al. 2022

Phys. Chem. Chem. Phys.

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“…The synergistic redox reaction allows for Cr (VI) to reduce into Cr (III) [155]. Ye et al managed to synthesize a ternary Ag/Bi 4 O 7 /g-C 3 N 4 nanosheets Z-scheme heterojunction photocatalyst for the photoreduction of Cr (VI) while using a combination of thermal polymerization, hydrothermal, and calcination [162]. The structure exhibited the deposition of Ag and Bi 4 O 7 on sheets of g-C 3 N 4 , similarly to the work that was conducted by Liu et al The relatively low band gap of both Bi 4 O 7 (1.89 eV) and g-C 3 N 4 (2.97 eV) enabled the ternary photocatalyst to exhibit excellent visible light responsive capabilities.…”

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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“…The visible-light-driven photocatalytic synthesis of imines has been reported using BiVO 4 /g-C 3 N 4 [12]. Different bismuth-based oxides have also been composited with other semiconductors to form heterojunctions such as Bi 2 O 2 CO 3 /Bi 4 O 7 [13] and g-C 3 N 4 /Bi 4 O 7 [14], including ternary heterojunctions like Ag/Bi 4 O 7 /g-C 3 N 4 [15] and Bi 2 O 4 -Bi 4 O 7 -BiO 2−x [16], which demonstrated outstanding activities.…”

Section: Introductionmentioning

confidence: 99%

Ce2O3/BiVO4 Embedded in rGO as Photocatalyst for the Degradation of Methyl Orange under Visible Light Irradiation

Onwudiwe

Phadi

Oyewo

2021

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A p–n heterojunction semiconductor structure composed of Ce3O4 and BiVO4 has been synthesized and then incorporated into reduced graphene oxide (rGO) by the hydrothermal method. The ternary composites were characterized by X-ray diffraction, transmission electron microscopy (TEM), scanning electron microscopy (SEM), electron diffraction spectroscopy (EDS), and UV–vis spectroscopy. The efficiency of the composites as photocatalysts was determined by studying the oxidative degradation of methyl orange in aqueous solution under visible light irradiation. The effect of parameters such as pH, catalyst loading, and concentration of the dye solution was examined in order to determine their influence on the photocatalytic activity of the composites. The composite incorporated into reduced graphene oxide presented the highest percentage (above 90%) in 2 h time, attributed to the effect of the increased surface area. The process of the enhanced photocatalytic activity has been discussed based on the energy band positions of the nanoparticles within the composite.

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Enhanced visible light photoreduction of aqueous Cr(VI) by Ag/Bi4O7/g-C3N4 nanosheets ternary metal/non-metal Z-scheme heterojunction

Cited by 83 publications

References 43 publications

Probing interfacial charge transfer in heterojunctions for photocatalysis

Probing interfacial charge transfer in heterojunctions for photocatalysis

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

Ce2O3/BiVO4 Embedded in rGO as Photocatalyst for the Degradation of Methyl Orange under Visible Light Irradiation

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