Metal-organic frameworks based photocatalysts: Architecture strategies for efficient solar energy conversion

Wang, Yuchang; Liu, Xiangyu; Wang, Xixi; Cao, Mao‐Sheng

doi:10.1016/j.cej.2021.129459

Cited by 96 publications

(46 citation statements)

References 160 publications

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“…It's urgent to seek new technologies to create renewable and clean energy, govern the environmental pollution for the sustainable development of human society. [1][2] Solar-driven photocatalytic water splitting hydrogen production is deemed as a viable and effective way to solve the increasingly serious energy crisis. [3][4][5] Since Honda and Fujishima found the phenomenon of water splitting under ultraviolet light irradiation in 1972 [6] and the upsurge of studying semiconductor photocatalyst has been raised in the past period of several decades.…”

Section: Introductionmentioning

confidence: 99%

Zn‐Vacancy Engineered S‐Scheme ZnCdS/ZnS Photocatalyst for Highly Efficient Photocatalytic H₂ Evolution

2021

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Vacancy defects engineering is a valid strategy to enhance the separation efficiency of photo-generated charges. Herein, a zinc vacancy mediated S-scheme ZnCdS/ZnS composite derived from ZnCdS/MOF-5 was constructed in-situ through the sacrificial reagent of Na 2 S/Na 2 SO 3 aqueous solution in visiblelight irradiation. The MOF-5 converted to ZnS (ZnSÀ V Zn ) with abundant zinc vacancies which were proved by the XPS and PL results. ZnSÀ V Zn has two-photon absorption performance, which immensely enhanced the visible light absorption capacity for the photocatalysts. The photo-generated electrons of ZnSÀ V Zn on the Zn-vacancy defect would regroup with the holes in the valence band (VB) of ZnCdS via ohmic contact which is induced by Zn-vacancy defects. Therefore, the photoexciton of ZnCdS can be able to separate effectively and eliminate the useless electrons and holes. The ZnCdS/ZnS(20) sample revealed an outstanding photocatalytic hydrogen generation rate of 12.31 mmol h À 1 g À 1 with a turnover number (TON) of 64.61, which is about 82.06 and 21.98 times greater than that of neat ZnSÀ V Zn and ZnCdS. This work gives an insight into the design of the zinc vacancy-engineered S-scheme photocatalyst of ZnCdS/ZnS for highly efficient photocatalysis.

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Section: Introductionmentioning

confidence: 99%

Zn‐Vacancy Engineered S‐Scheme ZnCdS/ZnS Photocatalyst for Highly Efficient Photocatalytic H₂ Evolution

2021

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“…However, there are several intractable issues with nanocomposites, such as a lack of effective photocatalytic units and a short lifetime of photogenerated carriers that prevent their widespread use. Therefore, the investigation of altering or decorating nanocomposites via architecture methodologies for improved photocatalytic performance is crucial, but it is fraught with difficulty and obstacles. − The preparation of various promising nanocomposite photocatalysts can be used to create a practical photocatalyst pathway. For improving the separation of electron–hole pairs and increasing the photocatalytic reaction rate, a variety of advanced materials and approaches have been proposed. − …”

Section: Introductionmentioning

confidence: 99%

Silver-Doped Cadmium Selenide/Graphene Oxide-Filled Cellulose Acetate Nanocomposites for Photocatalytic Degradation of Malachite Green toward Wastewater Treatment

et al. 2021

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Silver-doped cadmium selenide/graphene oxide (GO) (Ag-CdSe/GO) nanocomposites have been synthesized, loaded in cellulose acetate (CA) to form Ag-CdSe/GO@CA heterostructure nanofibers, and characterized in terms of structural, morphological, photocatalytic properties, among others. The photocatalytic degradation of malachite green (MG) was estimated using cadmium selenide-filled CA (CdSe@CA), silver-doped cadmium selenide-filled CA (Ag-CdSe@CA), cadmium selenide/GO-filled CA (CdSe/GO@CA), and silver-doped cadmium selenide/GO-filled CA (Ag-CdSe/GO@CA) nanocomposite materials. The Ag-CdSe/GO@CA nanocomposites exhibit and retain an enhanced photocatalytic activity for the degradation of MG dye. This amended performance is associated with the multifunctional supporting impacts of GO, Ag, and CA on the composite structure and properties. The superior photocatalytic activity is related to the fact that both Ag and GO can act as electron acceptors that boost the separation efficiency of photogenerated carriers and the loading of the combined nanocomposite (Ag-CdSe@GO) on CA nanofibers, which can augment the adsorption of electrons and holes and facilitate the movement of carriers. The stability of Ag-CdSe/GO@CA nanocomposite photocatalysts demonstrates suitable results even after five recycles. This study establishes an advanced semiconductor-based hybrid nanocomposite material for efficient photocatalytic degradation of organic dyes.

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“…Nowadays, there are several strategies for improving the photocatalytic activity of MOFs, many of which have been described in previous reviews. [81][82][83][84][85] We will highlight the main strategies with a focus on the preparation of heterostructures as the most promising approach.…”

Section: Strategies For Boosting the Photocatalytic Activity Of Mofsmentioning

confidence: 99%

Metal–organic framework‐based heterojunction photocatalysts for organic pollutant degradation: design, construction, and performances

Belousov

Fukina

Koryagin

2022

J of Chemical Tech & Biotech

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Heterogeneous photocatalysis has been considered one of the most attractive alternative routes to transforming naturally abundant, clean, and sustainable solar energy into chemical energy. Nowadays, the most popular heterogeneous photocatalyst, titanium dioxide, has already found applications for water splitting to produce hydrogen and oxygen, for the degradation of organic pollutants, for air purification, and for the creation of self‐cleaning coatings. However, TiO2 has a significant limitation: a large band gap (3.0–3.4 eV) that makes it impossible to use anything other than ultraviolet illumination to initiate photocatalytic processes. With a focus on efficient solar‐energy utilization, the development of new photocatalysts that are sensitive to visible light is an important direction in the theory and practice of heterogeneous photocatalysis. In this regard, the use of metal–organic frameworks (MOFs) is an attractive route; they have emerged as an interesting class of materials for applications in photoreactions due to their flexible tunability in composition, structure, and functional properties, along with their facilitated adsorption towards chemicals and their efficient light absorption. Moreover, they can be composed with other semiconductors to produce heterojunctions (e.g., type‐II, Z‐scheme, and S‐scheme), whose effectiveness in photogenerated charge separation has already been proven by many examples. The present critical review reports progress over the last 5 years in the preparation and activity of metal–organic framework‐based heterojunction photocatalysts for the degradation of organic pollutants. © 2022 Society of Chemical Industry (SCI).

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Metal-organic frameworks based photocatalysts: Architecture strategies for efficient solar energy conversion

Cited by 96 publications

References 160 publications

Zn‐Vacancy Engineered S‐Scheme ZnCdS/ZnS Photocatalyst for Highly Efficient Photocatalytic H₂ Evolution

Zn‐Vacancy Engineered S‐Scheme ZnCdS/ZnS Photocatalyst for Highly Efficient Photocatalytic H₂ Evolution

Silver-Doped Cadmium Selenide/Graphene Oxide-Filled Cellulose Acetate Nanocomposites for Photocatalytic Degradation of Malachite Green toward Wastewater Treatment

Metal–organic framework‐based heterojunction photocatalysts for organic pollutant degradation: design, construction, and performances

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Metal-organic frameworks based photocatalysts: Architecture strategies for efficient solar energy conversion

Cited by 96 publications

References 160 publications

Zn‐Vacancy Engineered S‐Scheme ZnCdS/ZnS Photocatalyst for Highly Efficient Photocatalytic H2 Evolution

Zn‐Vacancy Engineered S‐Scheme ZnCdS/ZnS Photocatalyst for Highly Efficient Photocatalytic H2 Evolution

Silver-Doped Cadmium Selenide/Graphene Oxide-Filled Cellulose Acetate Nanocomposites for Photocatalytic Degradation of Malachite Green toward Wastewater Treatment

Metal–organic framework‐based heterojunction photocatalysts for organic pollutant degradation: design, construction, and performances

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Zn‐Vacancy Engineered S‐Scheme ZnCdS/ZnS Photocatalyst for Highly Efficient Photocatalytic H₂ Evolution

Zn‐Vacancy Engineered S‐Scheme ZnCdS/ZnS Photocatalyst for Highly Efficient Photocatalytic H₂ Evolution