In-vacancy engineered plate-like In(OH)3 for effective photocatalytic reduction of CO2 with H2O vapor

Hu, Bingbing; Hu, Maocong; Guo, Qiang; Wang, Kang; Wang, Xitao

doi:10.1016/j.apcatb.2019.04.046

Cited by 78 publications

(38 citation statements)

References 57 publications

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“…Simultaneously, this argument also is supported by the results of electrochemical impedance spectroscopy (EIS). In general, the semicircle curve with the smaller radius represents the smaller impedance of charge transfer, which indicates better photoelectric performance 59,60 . Figure 9D shows that CCNC‐0.1 possesses the smaller high frequency semicircle curve, indicating that the hybrid photocatalysts have the higher conductivity to ensure rapid charge transfer.…”

Section: Resultsmentioning

confidence: 97%

Construction of CoS/CeO₂ heterostructure nanocages with enhanced photocatalytic performance under visible light

Meng

Zhou

et al. 2020

J Am Ceram Soc

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Exploring non‐noble metal photocatalysts with high activity and stability is always fascinating. Herein, the hollow CoS nanocages deriven from ZIF‐67 have been reported for the first time to combine with CeO2 NPs grown in situ for photocatalytic degradation of stubborn pollutants. The unique CoS nanocages not only provide rich active sites but also enhance light capture. CeO2 NPs loaded on the surface accelerate the separation of photocharges and extend the lifetime of photogenerated carriers. The optimized photocatalysts show outstanding activity and stability for the photodegradation of tetracycline and phenol under visible light, and the corresponding photodegradation efficiency is 96.5% and 90.5% at 60 minutes. The novel multi‐stage nanocage structure simultaneously realizes extended light absorption and improved photocharges transfer efficiency. This work provides an exclusive perspective to design high‐efficiency photocatalysts with hollow structures for environmental restoration.

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Section: Resultsmentioning

confidence: 97%

Construction of CoS/CeO₂ heterostructure nanocages with enhanced photocatalytic performance under visible light

Meng

Zhou

et al. 2020

J Am Ceram Soc

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“…Metal monohydroxides are a crucial class of semiconductor compounds with rich functional hydroxyl groups on their surface, which can be prepared via simple process without post-heat treatment. [96][97][98][99] The existence of hydroxyl groups facilitates the activation reaction of H 2 O molecules, thus favoring the following photocatalysis such as CO 2 reduction. H 2 O acts as a Lewis base providing a pair of nonbonding electrons, and meanwhile the OVs serve as activated Lewis acidic sites, facilitating the generation of other Lewis acid-base interactions and hence promoting the photocatalytic activities.…”

Section: Monohydroxidementioning

confidence: 99%

“…In(OH) 3 , with a wide band gap of ≈5.2 eV, is an intermediate in hydrothermal synthesis process of indium oxide. [97,100] A typical OV-induced In(OH) 3 /carbon nitride heterojunction (OV-In(OH) 3 /CN) showed enhanced photocatalytic nitrogen fixation capability with high chemical stability. [96] In this system, OVs on In(OH) 3 were demonstrated to accept and trap electrons from g-C 3 N 4 , and then the separation efficiency of electron-hole pairs was promoted and the lifetime of carriers was prolonged.…”

Section: Monohydroxidementioning

confidence: 99%

Oxygen Vacant Semiconductor Photocatalysts

Lin

Huang

2021

Adv Funct Materials

281

134

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Semiconductor photocatalysis acts as a sustainable green technology to convert solar energy for environmental purification and production of renewable energy. However, the current photocatalysts suffer from inefficient photoabsorption, rapid recombination of photogenerated electrons and holes, and inadequate surface reactive sites. Introduction of oxygen vacancies (OVs) in photocatalysts has been demonstrated to be an efficacious strategy to solve these issues and improve photocatalytic efficiency. This review systematically summarizes the recent progress in the oxygen vacant semiconductor photocatalysts. Firstly, the formation and characterizations of OVs in semiconductor photocatalysts are briefly introduced. Then, highlighted are the roles of OVs in the photocatalytic reactions of three types of typical oxygencontaining semiconductors, including metal oxides (TiO 2 , ZnO, WO 3 , W 18 O 49 , MoO 3 , BiO 2-x , SnO 2 , etc), hydroxides (In(OH) 3 , Ln(OH) 3 (Ln=La, Pr, and Nd), Layered double hydroxides) and oxysalts (bismuth-based oxysalts and others) photocatalysts. Moreover, the advanced photocatalytic applications of oxygen vacant semiconductor photocatalysts, such as pollutant removal, H 2 production, CO 2 reduction, N 2 fixation and organic synthesis are systematically summarized. Finally, an overview on the current challenges and a prospective on the future of oxygen vacant materials is proposed.

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“…In addition to tuning vacancy concentrations, doping exotic atoms into defective ultrathin 2D materials is typically regarded as a common strategy to further alter the adsorption energy of CO 2 molecules on actively unsaturated sites [2b,54] . Generally, the coordinatively unsaturated sites with low metal species induced by vacancy help to the chemisorption of CO 2 molecules, thereby promoting CO 2 molecules activation [52,55] . However, the CO 2 reduction activity of defective photocatalysts still remains limited by some issues, such as low stability and poor concentration of vacancies.…”

Section: Relevant Strategies Based On Vacancy Engineeringmentioning

confidence: 99%

Vacancy Engineering of Ultrathin 2D Materials for Photocatalytic CO₂Reduction

Qiu

Zhang

et al. 2021

ChemNanoMat

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Photocatalytic carbon dioxide (CO2) reduction is a sustainable and green strategy for the conversion of CO2 into hydrocarbon solar fuels, whereas its large‐scale application is severely restricted by lack of highly effective photocatalysts. Ultrathin 2D materials with tunable electronic structure display great potential towards photocatalytic CO2 reduction. However, the photocatalytic performance still remains unsatisfied due to high activation energy of CO2 molecules on catalytic sites. To this end, surface vacancy engineering can endow coordinately unsaturated sites as actively catalytic sites for CO2 molecules chemisorption and activation. In this review, we focus on vacancy‐engineered ultrathin materials for CO2 photoreduction. Different vacancies with classified anion vacancies, cation vacancies, vacancy pairs, voids, and their corresponding role in CO2 photoreduction are proposed. The different strategies based on vacancy engineering, including direct modulation of vacancy concentrations, refining vacancy states by heteroatom, and vacancy‐engineered heterostructure, are presented. Finally, the future developments and their associated challenges concerning defective ultrathin 2D materials are discussed.

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In-vacancy engineered plate-like In(OH)3 for effective photocatalytic reduction of CO2 with H2O vapor

Cited by 78 publications

References 57 publications

Construction of CoS/CeO₂ heterostructure nanocages with enhanced photocatalytic performance under visible light

Construction of CoS/CeO₂ heterostructure nanocages with enhanced photocatalytic performance under visible light

Oxygen Vacant Semiconductor Photocatalysts

Vacancy Engineering of Ultrathin 2D Materials for Photocatalytic CO₂Reduction

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In-vacancy engineered plate-like In(OH)3 for effective photocatalytic reduction of CO2 with H2O vapor

Cited by 78 publications

References 57 publications

Construction of CoS/CeO2 heterostructure nanocages with enhanced photocatalytic performance under visible light

Construction of CoS/CeO2 heterostructure nanocages with enhanced photocatalytic performance under visible light

Oxygen Vacant Semiconductor Photocatalysts

Vacancy Engineering of Ultrathin 2D Materials for Photocatalytic CO2Reduction

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Product

Resources

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Construction of CoS/CeO₂ heterostructure nanocages with enhanced photocatalytic performance under visible light

Construction of CoS/CeO₂ heterostructure nanocages with enhanced photocatalytic performance under visible light

Vacancy Engineering of Ultrathin 2D Materials for Photocatalytic CO₂Reduction