Mechanisms behind photocatalytic CO2 reduction by CsPbBr3 perovskite-graphene-based nanoheterostructures

Yu Hung Chen; Jin Kun Ye; Yao Jen Chang; Tzu Wei Liu; Yu Hao Chuang; Wei Ren Liu; Shou Heng Liu; Ying Chih Pu

doi:10.1016/j.apcatb.2020.119751

Mechanisms behind photocatalytic CO₂ reduction by CsPbBr₃ perovskite-graphene-based nanoheterostructures

Yu Hung Chen, Jin Kun Ye, Yao Jen Chang, Tzu Wei Liu, Yu Hao Chuang, Wei Ren Liu, Shou Heng Liu, Ying Chih Pu

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Abstract

We demonstrate the CsPbBr₃ nanoparticles can in-situ growth on semiconducting graphene oxide (GO) and conductive few-layer graphene (FLG) surfaces, individually. The type-II and Schottky-junction-like energy band structures of CsPbBr₃-GO and CsPbBr₃-FLG nanoheterostructures (NHSs) resulted in the varied interfacial charge transfer (CT) behaviors. The CT rate constant (k_CT) of CsPbBr₃-GO and CsPbBr₃-FLG NHSs could be modulated by controlling their constituent ratio of GO/FLG. Moreover, the CO₂−to−CH₄ conversion rate (k_CH₄) of CsPbBr₃-GO NHSs showed a positive relation with k_CT, while the negative correlation between k_CH₄ and k_CT for CsPbBr₃-FLG NHSs was observed. The mechanism can be suggested as that the different energy band structures in CsPbBr₃-graphehe-based NHSs provide the varied reduction potential for the photoexcited charge carriers to effect the performance in photocatalytic CO₂ reduction. This work presents the important insights into the design of perovskite-graphene based NHS with remarkable performance for solar-driven CO₂ conversion.

Original language	English
Article number	119751
Journal	Applied Catalysis B: Environmental
Volume	284
DOIs	https://doi.org/10.1016/j.apcatb.2020.119751
Publication status	Published - 2021 May 5

All Science Journal Classification (ASJC) codes

Catalysis
General Environmental Science
Process Chemistry and Technology

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title = "Mechanisms behind photocatalytic CO2 reduction by CsPbBr3 perovskite-graphene-based nanoheterostructures",

abstract = "We demonstrate the CsPbBr3 nanoparticles can in-situ growth on semiconducting graphene oxide (GO) and conductive few-layer graphene (FLG) surfaces, individually. The type-II and Schottky-junction-like energy band structures of CsPbBr3-GO and CsPbBr3-FLG nanoheterostructures (NHSs) resulted in the varied interfacial charge transfer (CT) behaviors. The CT rate constant (kCT) of CsPbBr3-GO and CsPbBr3-FLG NHSs could be modulated by controlling their constituent ratio of GO/FLG. Moreover, the CO2−to−CH4 conversion rate (kCH4) of CsPbBr3-GO NHSs showed a positive relation with kCT, while the negative correlation between kCH4 and kCT for CsPbBr3-FLG NHSs was observed. The mechanism can be suggested as that the different energy band structures in CsPbBr3-graphehe-based NHSs provide the varied reduction potential for the photoexcited charge carriers to effect the performance in photocatalytic CO2 reduction. This work presents the important insights into the design of perovskite-graphene based NHS with remarkable performance for solar-driven CO2 conversion.",

author = "Chen, {Yu Hung} and Ye, {Jin Kun} and Chang, {Yao Jen} and Liu, {Tzu Wei} and Chuang, {Yu Hao} and Liu, {Wei Ren} and Liu, {Shou Heng} and Pu, {Ying Chih}",

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year = "2021",

month = may,

day = "5",

doi = "10.1016/j.apcatb.2020.119751",

language = "English",

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journal = "Applied Catalysis B: Environmental",

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T1 - Mechanisms behind photocatalytic CO2 reduction by CsPbBr3 perovskite-graphene-based nanoheterostructures

AU - Chen, Yu Hung

AU - Ye, Jin Kun

AU - Chang, Yao Jen

AU - Liu, Tzu Wei

AU - Chuang, Yu Hao

AU - Liu, Wei Ren

AU - Liu, Shou Heng

AU - Pu, Ying Chih

PY - 2021/5/5

Y1 - 2021/5/5

N2 - We demonstrate the CsPbBr3 nanoparticles can in-situ growth on semiconducting graphene oxide (GO) and conductive few-layer graphene (FLG) surfaces, individually. The type-II and Schottky-junction-like energy band structures of CsPbBr3-GO and CsPbBr3-FLG nanoheterostructures (NHSs) resulted in the varied interfacial charge transfer (CT) behaviors. The CT rate constant (kCT) of CsPbBr3-GO and CsPbBr3-FLG NHSs could be modulated by controlling their constituent ratio of GO/FLG. Moreover, the CO2−to−CH4 conversion rate (kCH4) of CsPbBr3-GO NHSs showed a positive relation with kCT, while the negative correlation between kCH4 and kCT for CsPbBr3-FLG NHSs was observed. The mechanism can be suggested as that the different energy band structures in CsPbBr3-graphehe-based NHSs provide the varied reduction potential for the photoexcited charge carriers to effect the performance in photocatalytic CO2 reduction. This work presents the important insights into the design of perovskite-graphene based NHS with remarkable performance for solar-driven CO2 conversion.

AB - We demonstrate the CsPbBr3 nanoparticles can in-situ growth on semiconducting graphene oxide (GO) and conductive few-layer graphene (FLG) surfaces, individually. The type-II and Schottky-junction-like energy band structures of CsPbBr3-GO and CsPbBr3-FLG nanoheterostructures (NHSs) resulted in the varied interfacial charge transfer (CT) behaviors. The CT rate constant (kCT) of CsPbBr3-GO and CsPbBr3-FLG NHSs could be modulated by controlling their constituent ratio of GO/FLG. Moreover, the CO2−to−CH4 conversion rate (kCH4) of CsPbBr3-GO NHSs showed a positive relation with kCT, while the negative correlation between kCH4 and kCT for CsPbBr3-FLG NHSs was observed. The mechanism can be suggested as that the different energy band structures in CsPbBr3-graphehe-based NHSs provide the varied reduction potential for the photoexcited charge carriers to effect the performance in photocatalytic CO2 reduction. This work presents the important insights into the design of perovskite-graphene based NHS with remarkable performance for solar-driven CO2 conversion.

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Mechanisms behind photocatalytic CO₂ reduction by CsPbBr₃ perovskite-graphene-based nanoheterostructures

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