High Efficiency Photocatalytic Water Splitting Using 2D alpha-Fe2O3/g-C3N4 Z-Scheme Catalysts

She Xiaojie; Wu Jingjie; Xu Hui; Zhong Jun; Wang Yan; Song Yanhua; Nie Kaiqi; Liu Yang; Yang Yingchao; Rodrigues Marco-Tulio F.; Vajtai Robert; Lou Jun; Du Daolin; Li Huaming; Ajayan Pulickel M.

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High Efficiency Photocatalytic Water Splitting Using 2D alpha-Fe2O3/g-C3N4 Z-Scheme Catalysts

机译：使用2D alpha-Fe2O3 / g-C3N4 Z催化剂的高效光催化水分解

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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 alpha-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 H-2 evolution rate >3 x 10(4) mu mol g(-1) h(-1) and external quantum efficiency of 44.35% at lambda = 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.

机译：光催化是实现人工光合作用的最有希望的方法，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-Fe2O3纳米片可以积极促进g-C3N4的剥落，产生具有紧密界面和全固态Z方案连接的2D杂化体。这些纳米结构的杂化体呈现出高的H-2演化速率> 3 x 10（4）μmol g（-1）h（-1），外部量子效率在lambda = 420 nm时为44.35％，是迄今为止报道的最高值g-C3N4光催化剂家族。除了有效地抑制电子-空穴对的重组外，这种Z-方案结还表现出了对整个水分解的活性，而没有任何牺牲供体。为控制基于2D g-C3N4的结构的生产而提出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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来源
《Advanced energy materials》 |2017年第17期|1700025.1-1700025.7|共7页
作者
She Xiaojie; Wu Jingjie; Xu Hui; Zhong Jun; Wang Yan; Song Yanhua; Nie Kaiqi; Liu Yang; Yang Yingchao; Rodrigues Marco-Tulio F.; Vajtai Robert; Lou Jun; Du Daolin; Li Huaming; Ajayan Pulickel M.;
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作者单位

Jiangsu Univ, Inst Energy Res, Zhenjiang 212013, Peoples R China;

Rice Univ, Dept Mat Sci & NanoEngn, Houston, TX 77005 USA;

Jiangsu Univ, Inst Energy Res, Zhenjiang 212013, Peoples R China|Rice Univ, Dept Mat Sci & NanoEngn, Houston, TX 77005 USA;

Soochow Univ, Inst Funct Nano & Soft Mat, Suzhou 215123, Peoples R China;

Rice Univ, Dept Mat Sci & NanoEngn, Houston, TX 77005 USA;

Rice Univ, Dept Mat Sci & NanoEngn, Houston, TX 77005 USA;

Soochow Univ, Inst Funct Nano & Soft Mat, Suzhou 215123, Peoples R China;

Rice Univ, Dept Mat Sci & NanoEngn, Houston, TX 77005 USA;

Rice Univ, Dept Mat Sci & NanoEngn, Houston, TX 77005 USA;

Rice Univ, Dept Mat Sci & NanoEngn, Houston, TX 77005 USA;

Rice Univ, Dept Mat Sci & NanoEngn, Houston, TX 77005 USA;

Rice Univ, Dept Mat Sci & NanoEngn, Houston, TX 77005 USA;

Jiangsu Univ, Inst Energy Res, Zhenjiang 212013, Peoples R China;

Jiangsu Univ, Inst Energy Res, Zhenjiang 212013, Peoples R China;

Rice Univ, Dept Mat Sci & NanoEngn, Houston, TX 77005 USA;

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正文语种 eng
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关键词
2D hybrids; hydrogen evolution; photocatalysis; water splitting; Z-scheme;

机译：二维杂种;氢析出;光催化;水分解;Z-方案;

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1. Nitrogen Defects-Rich 0D/2D alpha-Fe2O3/g-C3N4 Z-Scheme Photocatalyst for Enhanced Photooxidation and H-2 Evolution Efficiencies [J] . Zhao Chaocheng, Wang Shuaijun, Yan Qingyun, Nano: brief reports and reviews . 2018,第7期

机译：氮缺陷的0d / 2dα-Fe2O3 / g-C3N4 Z方案光催化剂用于增强光氧化和H-2演化效率
2. 2D BiVO4/g-C3N4 Z-scheme photocatalyst for enhanced overall water splitting [J] . Xie Hanyi, Zhao Yanfang, Li Huijuan, Journal of Materials Science . 2019,第15期

机译：2D BIVO4 / G-C3N4 Z方案光催化剂，用于增强整体水分裂
3. The construction of g-C3N4/Sm2+ doped Bi2WO6 2D/2D Z-scheme heterojunction for improved visible-light excited photocatalytic efficiency [J] . Jin Chongyue, Li Zhilin, Zhang Yu, Separation and Purification Technology . 2019,第期

机译：G-C3N4 / SM2 +掺杂Bi2WO6 2D / 2D Z方案异质结的构建，改善了可见光激发光催化效率
4. Visible light Z-scheme water splitting using nitrogen/fluorinecodoped rutile TiO2 as O2 evolution photocatalyst [C] . Akinobu Miyoshi, Junie Jhon M.Vequizo, Shunta Nishioka 日本化学会春季年会 . 2020

机译：可见光Z方案使用氮气/氟纤维金红石TiO2作为O2进化光催化剂的水分裂
5. Re-Investigation of Reaction Kinetics and Charge Transfer Phenomena in Water Splitting Process by Cocatalyst-Loaded GaNZnO Particulate Photocatalytic Systems [D] . Jiang, Yibo. 2017

机译：负载助催化剂的GaNZnO颗粒光催化体系对水分解过程中反应动力学和电荷转移现象的再研究
6. Deciphering Z-scheme Charge Transfer Dynamics in Heterostructure NiFe-LDH/N-rGO/g-C3N4 Nanocomposite for Photocatalytic Pollutant Removal and Water Splitting Reactions [O] . Susanginee Nayak, K. M. Parida -1

机译：NiFe-LDH / N-rGO / g-C3N4纳米复合杂化结构中Z方案电荷转移动力学的破译用于光催化去除和水分解反应
7. Deciphering Z-scheme Charge Transfer Dynamics in Heterostructure NiFe-LDH/N-rGO/g-C3N4 Nanocomposite for Photocatalytic Pollutant Removal and Water Splitting Reactions [O] . Susanginee Nayak, K. M. Parida 2019

机译：异质结构NiFe-LDH / N-RGO / G-C3N4纳米复合材料中的解Z方案电荷转移动力学，用于光催化污染物去除和水分裂反应

High Efficiency Photocatalytic Water Splitting Using 2D alpha-Fe2O3/g-C3N4 Z-Scheme Catalysts

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