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

机译:通过从无定形的金属氢氧化物的杂纳米组件中结晶赋予Znga2O4光催化剂的CO 2降低选择性

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Imparting an enhanced CO _(2) reduction selectivity to ZnGa _(2) O _(4) 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 _(2) O _(4) obtained by a heat-treatment exhibits a higher surface basicity and an enhanced affinity for CO _(2) molecules than previously-reported standard ZnGa _(2) O _(4) . The enhanced affinity for CO _(2) molecules of the resultant ZnGa _(2) O _(4) leads to highly-selective CO evolution in CO _(2) photo-reduction with H _(2) O reductants. The present scheme is promising to achieve desirable surface chemistry on metal oxide photocatalysts.
机译:通过从锌和氢氧化镓的interdereded纳米颗粒的控制结晶,通过从锌和氢氧化镓的纳米颗粒的控制结晶来证明,赋予增强型CO _(2)_(4)光催化剂的减少选择性。通过环氧驱动溶胶 - 凝胶反应制备其中Zn(II)和Ga(III)和Ga(III)的氢氧化物前体是通过环氧树脂驱动的溶胶 - 凝胶反应制备的。通过热处理获得的Znga _(2)O _(4)表现出较高的表面碱度和对CO _(2)分子的增强的亲和力而不是先前报道的标准Znga _(2)O _(4)。所得Znga _(2)o _(4)的CO _(2)分子的增强亲和力导致CO _(2)光还原的高度选择性CO进化,用H _(2)O还原剂。本发明方案很有希望在金属氧化物光催化剂上实现所需的表面化学。

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