Z-scheme photocatalysts for visible-light-driven pollutants degradation: A review on recent advancements

Hassani, Aydin; Krishnan, Sridevi; Scaria, Jaimy; Eghbali, Paria; Nidheesh, P.V.

doi:10.1016/j.cossms.2021.100941

Cited by 177 publications

(45 citation statements)

References 193 publications

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“…[ 31 ] This type of Z‐scheme heterojunction was reported for the first time; it does not require an electron mediator and was named direct Z‐scheme heterojunction. Direct Z‐scheme heterojunctions, which are formed by two semiconductors that are in direct contact, do not require an additional electron transfer medium [ 32 ] but still effectively follow the Z‐scheme electron transfer mechanism. The basic design principle of direct Z‐scheme heterojunctions is that the two semiconductors have a staggered gap, and the semiconductor with the higher potential (catalyst I) has a lower work function than the semiconductor with the lower potential (catalyst II).…”

Section: Working Principles Of Different Heterojunction Photocatalystsmentioning

confidence: 99%

Heterojunction Nanomedicine

et al. 2022

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Exogenous stimulation catalytic therapy has received enormous attention as it holds great promise to address global medical issues. However, the therapeutic effect of catalytic therapy is seriously restricted by the fast charge recombination and the limited utilization of exogenous stimulation by catalysts. In the past few decades, many strategies have been developed to overcome the above serious drawbacks, among which heterojunctions are the most widely used and promising strategy. This review attempts to summarize the recent progress in the rational design and fabrication of heterojunction nanomedicine, such as semiconductor-semiconductor heterojunctions (including type I, type II, type III, P-N, and Z-scheme junctions) and semiconductor-metal heterojunctions (including Schottky, Ohmic, and localized surface plasmon resonance-mediated junctions). The catalytic mechanisms and properties of the above junction systems are also discussed in relation to biomedical applications, especially cancer treatment and sterilization. This review concludes with a summary of the challenges and some perspectives on future directions in this exciting and still evolving field of research.

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Section: Working Principles Of Different Heterojunction Photocatalystsmentioning

confidence: 99%

Heterojunction Nanomedicine

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“…Semiconductor photocatalysts, containing metal oxides (e.g., ZnO and TiO 2 ), nitrides or sulfides (e.g., CdS and MoS 2 ), and metal-free semiconductors, are widely used in various photocatalytic reactions due to their advantages of simple preparation, low cost, low toxicity, and adjustable band gap ( Li et al, 2013 ; Weng et al, 2019 ; Dou et al, 2021 ; Hassani et al, 2021 ). The application of semiconductor photocatalyst in the catalytic production of biodiesel has been widely studied and high yield has been obtained ( Aghilinategh et al, 2019 ; Ghani et al, 2021 ; Guo et al, 2021 ; Nadeem et al, 2021 ; Guo et al, 2022 ).…”

Section: Mechanism Of Photocatalytic (Trans)esterificationmentioning

confidence: 99%

“…During this process, photogenerated carriers are easy to contact organic compounds. The construction of the local electric field, morphology control, and interface modification strategies can be used to promote the separation and transmission of photogenerated carriers ( Wang L et al, 2018 ; Hassani et al, 2021 ; Nishiyama et al, 2021 ). The heterojunction is the interface region formed by the contact of two different semiconductors, which produces electron and hole concentration differences at the interface, thus forming a heterojunction electric field that can promote the separation of carriers.…”

Section: Strategies For Improving Photocatalyst Performancementioning

confidence: 99%

“…Firstly, the reactants should be adsorbed on the active site of the photocatalyst, so the reactants can be strongly adsorbed by oxygen vacancies on the catalyst ( Li et al, 2015b ). The added cocatalyst can reduce the accumulation and recombination of carriers, and further introduce other modification layers between the modification layer and the semiconductor layer, which may be beneficial to the separation and transmission of carriers ( Hassani et al, 2021 ; Nishiyama et al, 2021 ). Moreover, stirring can promote the adsorption of reactants and the desorption of products, which is conducive to the capture of photogenerated carriers by reactants, thereby speeding up the reaction ( Guo et al, 2021 ).…”

Section: Strategies For Improving Photocatalyst Performancementioning

confidence: 99%

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Research Progress on the Photo-Driven Catalytic Production of Biodiesel

et al. 2022

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Biodiesel considered a green, environmentally friendly, and renewable energy source is one of the most promising candidates to replace fossil fuels to supply energy for the world. The conventional thermocatalytic methods have been extensively explored for producing biodiesel, while inevitably encountering some drawbacks, such as harsh operating conditions and high energy consumption. The catalytic production of biodiesel under mild conditions is a research hotspot but with difficulty. Photocatalysis has recently been highlighted as an eco-friendly and energy-saving approach for biodiesel production. This mini-review summarizes typical photocatalysts for biodiesel production and discusses in detail the catalytic mechanism and strategies of the photo-driven (trans)esterification to produce biodiesel. The current challenges and future opportunities of photo-driven catalysis to prepare biodiesel are also outlined, in steps towards guiding the design of advanced photocatalysts for biodiesel production.

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“…The development of photocatalysts for environmental remediation has been widely investigated, with emphasis on materials designed to harness solar energy ( Hassani et al, 2021 ). However, a major disadvantage of photocatalysts is their photocatalytic efficiency, which is directly related to their intrinsic stability.…”

Section: Introductionmentioning

confidence: 99%

Bismuth Oxyhalide-Based Materials (BiOX: X = Cl, Br, I) and Their Application in Photoelectrocatalytic Degradation of Organic Pollutants in Water: A Review

et al. 2022

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An important target of photoelectrocatalysis (PEC) technology is the development of semiconductor-based photoelectrodes capable of absorbing solar energy (visible light) and promoting oxidation and reduction reactions. Bismuth oxyhalide-based materials BiOX (X = Cl, Br, and I) meet these requirements. Their crystalline structure, optical and electronic properties, and photocatalytic activity under visible light mean that these materials can be coupled to other semiconductors to develop novel heterostructures for photoelectrochemical degradation systems. This review provides a general overview of controlled BiOX powder synthesis methods, and discusses the optical and structural features of BiOX-based materials, focusing on heterojunction photoanodes. In addition, it summarizes the most recent applications in this field, particularly photoelectrochemical performance, experimental conditions and degradation efficiencies reported for some organic pollutants (e.g., pharmaceuticals, organic dyes, phenolic derivatives, etc.). Finally, as this review seeks to serve as a guide for the characteristics and various properties of these interesting semiconductors, it discusses future PEC-related challenges to explore.

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Z-scheme photocatalysts for visible-light-driven pollutants degradation: A review on recent advancements

Cited by 177 publications

References 193 publications

Heterojunction Nanomedicine

Heterojunction Nanomedicine

Research Progress on the Photo-Driven Catalytic Production of Biodiesel

Bismuth Oxyhalide-Based Materials (BiOX: X = Cl, Br, I) and Their Application in Photoelectrocatalytic Degradation of Organic Pollutants in Water: A Review

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