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High Efficiency Photocatalytic Water Splitting Using 2D α‐Fe2O3/g‐C3N4 Z‐Scheme Catalysts
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2017-05-08 , DOI: 10.1002/aenm.201700025 Xiaojie She 1 , Jingjie Wu 2 , Hui Xu 1, 2 , Jun Zhong 3 , Yan Wang 2 , Yanhua Song 2 , Kaiqi Nie 3 , Yang Liu 2 , Yingchao Yang 2 , Marco-Tulio F. Rodrigues 2 , Robert Vajtai 2 , Jun Lou 2 , Daolin Du 1 , Huaming Li 1 , Pulickel M. Ajayan 2
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2017-05-08 , DOI: 10.1002/aenm.201700025 Xiaojie She 1 , Jingjie Wu 2 , Hui Xu 1, 2 , Jun Zhong 3 , Yan Wang 2 , Yanhua Song 2 , Kaiqi Nie 3 , Yang Liu 2 , Yingchao Yang 2 , Marco-Tulio F. Rodrigues 2 , Robert Vajtai 2 , Jun Lou 2 , Daolin Du 1 , Huaming Li 1 , Pulickel M. Ajayan 2
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Photocatalysis is the most promising method for achieving artificial photosynthesis, but a bottleneck is encountered in finding materials that could efficiently promote the water splitting reaction. The nontoxicity, low cost, and versatility of photocatalysts make them especially attractive for this application. This study demonstrates that small amounts of α‐Fe2O3 nanosheets can actively promote exfoliation of g‐C3N4, producing 2D hybrid that exhibits tight interfaces and an all‐solid‐state Z‐scheme junction. These nanostructured hybrids present a high H2 evolution rate >3 × 104 µmol g‐1 h‐1 and external quantum efficiency of 44.35% at λ = 420 nm, the highest value so far reported among the family of g‐C3N4 photocatalysts. Besides effectively suppressing the recombination of electron–hole pairs, this Z‐scheme junction also exhibits activity toward overall water splitting without any sacrificial donor. The proposed synthetic route for controlled production of 2D g‐C3N4‐based structures provides a scalable alternative toward the development of highly efficient and active photocatalysts.
中文翻译：
使用2Dα-Fe2O3/ g-C3N4 Z催化剂的高效光催化水分解
光催化是实现人工光合作用的最有前途的方法，但是在寻找可以有效促进水分解反应的材料时遇到了瓶颈。光催化剂的无毒，低成本和多功能性使其特别适合该应用。这项研究表明，少量的α-Fe的2 ö 3纳米薄片可以积极促进G-C的剥离3 Ñ 4，产生二维混合呈现紧接口和全固态Z-方案结。这些纳米结构杂化体的H 2释放速率高，> 3×10 4 µmol g -1 h -1λ= 420 nm时的外部量子效率为44.35％，这是迄今为止在g‐C 3 N 4光催化剂家族中报道的最高值。除了有效抑制电子-空穴对的重组外，这种Z方案结还表现出了对总水分解的活性，而没有任何牺牲性供体。拟议的用于2D g-C 3 N 4基结构的受控生产的合成路线为开发高效和活性光催化剂提供了可扩展的替代方案。
更新日期：2017-05-08
中文翻译：
使用2Dα-Fe2O3/ g-C3N4 Z催化剂的高效光催化水分解
光催化是实现人工光合作用的最有前途的方法，但是在寻找可以有效促进水分解反应的材料时遇到了瓶颈。光催化剂的无毒，低成本和多功能性使其特别适合该应用。这项研究表明，少量的α-Fe的2 ö 3纳米薄片可以积极促进G-C的剥离3 Ñ 4，产生二维混合呈现紧接口和全固态Z-方案结。这些纳米结构杂化体的H 2释放速率高，> 3×10 4 µmol g -1 h -1λ= 420 nm时的外部量子效率为44.35％，这是迄今为止在g‐C 3 N 4光催化剂家族中报道的最高值。除了有效抑制电子-空穴对的重组外，这种Z方案结还表现出了对总水分解的活性，而没有任何牺牲性供体。拟议的用于2D g-C 3 N 4基结构的受控生产的合成路线为开发高效和活性光催化剂提供了可扩展的替代方案。
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