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Imparting CO2 reduction selectivity to ZnGa2O4 photocatalysts by crystallization from hetero nano assembly of amorphous-like metal hydroxides.

ABSTRACT: Imparting an enhanced CO2 reduction selectivity to ZnGa2O4 photocatalysts has been demonstrated by controlled crystallization from interdispersed nanoparticles of zinc and gallium hydroxides. The hydroxide precursor in which Zn(ii) and Ga(iii) are homogeneously interdispersed was prepared through an epoxide-driven sol-gel reaction. ZnGa2O4 obtained by a heat-treatment exhibits a higher surface basicity and an enhanced affinity for CO2 molecules than previously-reported standard ZnGa2O4. The enhanced affinity for CO2 molecules of the resultant ZnGa2O4 leads to highly-selective CO evolution in CO2 photo-reduction with H2O reductants. The present scheme is promising to achieve desirable surface chemistry on metal oxide photocatalysts.

SUBMITTER: Takemoto M 

PROVIDER: S-EPMC9049919 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature

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Imparting CO<sub>2</sub> reduction selectivity to ZnGa<sub>2</sub>O<sub>4</sub> photocatalysts by crystallization from hetero nano assembly of amorphous-like metal hydroxides.

Takemoto Masanori M   Tokudome Yasuaki Y   Kikkawa Soichi S   Teramura Kentaro K   Tanaka Tsunehiro T   Okada Kenji K   Murata Hidenobu H   Nakahira Atsushi A   Takahashi Masahide M  

RSC advances 20200225 14

Imparting an enhanced CO<sub>2</sub> reduction selectivity to ZnGa<sub>2</sub>O<sub>4</sub> photocatalysts has been demonstrated by controlled crystallization from interdispersed nanoparticles of zinc and gallium hydroxides. The hydroxide precursor in which Zn(ii) and Ga(iii) are homogeneously interdispersed was prepared through an epoxide-driven sol-gel reaction. ZnGa<sub>2</sub>O<sub>4</sub> obtained by a heat-treatment exhibits a higher surface basicity and an enhanced affinity for CO<sub>2</  ...[more]

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