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Design of Three-Dimensional Hollow-Sphere Architecture of Ti3C2Tx MXene with Graphitic Carbon Nitride Nanoshells for Efficient Photocatalytic Hydrogen Evolution
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-09-04 , DOI: 10.1021/acsaem.0c01590 Jiyeon Kang 1 , Segi Byun 2 , Seulgi Kim 1 , Jaesoung Lee 1 , Minsik Jung 1 , Hyewon Hwang 1 , Tae Woo Kim 2 , Sung Ho Song 3 , Dongju Lee 1
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-09-04 , DOI: 10.1021/acsaem.0c01590 Jiyeon Kang 1 , Segi Byun 2 , Seulgi Kim 1 , Jaesoung Lee 1 , Minsik Jung 1 , Hyewon Hwang 1 , Tae Woo Kim 2 , Sung Ho Song 3 , Dongju Lee 1
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Photocatalytic water splitting is the most environmentally friendly method to generate energy. Despite intense research in this area, rapid charge-carrier recombination and limited light absorption of semiconductor-based photocatalysts remain key challenges. Herein, protonated g-C3N4/Ti3C2Tx MXene hollow spheres, fabricated by electrostatic layer-by layer assembly and a sacrificial template, were used for effective photocatalytic hydrogen (H2) evolution. The constructed three-dimensional (3D) hollow spheres exhibited enhanced light absorption, a two-dimensional (2D) heterostructure to shorten the electron migration distance, a Schottky junction to facilitate separation and transfer of charge carriers, and high specific surface area for efficient H2 adsorption. The optimal formulation had an H2 production rate of 982.8 μmol g–1 h–1, which is more than 3.5-fold higher than the H2 production rate of pure protonated g-C3N4 and 1.22-fold higher than the H2 production rate of protonated g-C3N4/Ti3C2Tx, which lacks the hollow structure. This unique 3D heterojunction structure made from 2D materials improved photocatalytic H2 production performance and can be readily extended to other reactions.
中文翻译：
具有石墨化氮化碳纳米壳的Ti 3 C 2 T x MXene的三维空心球结构设计，用于高效光催化氢的释放
光催化水分解是产生能量的最环保的方法。尽管在该领域进行了深入研究，但是快速的电荷-载流子复合和半导体基光催化剂的有限的光吸收仍然是关键的挑战。在此，将通过静电逐层组装和牺牲模板制造的质子化的gC 3 N 4 / Ti 3 C 2 T x MXene中空球用于有效的光催化氢（H 2）演变。构造的三维（3D）空心球表现出增强的光吸收，二维（2D）异质结构以缩短电子迁移距离，肖特基结以促进电荷载流子的分离和转移以及高比表面积以实现高效H 2吸附。最佳制剂具有的H 2的982.8微摩尔克生产速率-1 ħ -1，这是超过3.5倍比H更高2质子化GC的纯产率3 Ñ 4和1.22倍比H更高2生产质子化率gC 3 N 4 / Ti 3 C2 T x，它没有空心结构。这种由2D材料制成的独特3D异质结结构改善了光催化H 2的生产性能，可以轻松扩展到其他反应。
更新日期：2020-09-28
中文翻译：
具有石墨化氮化碳纳米壳的Ti 3 C 2 T x MXene的三维空心球结构设计，用于高效光催化氢的释放
光催化水分解是产生能量的最环保的方法。尽管在该领域进行了深入研究，但是快速的电荷-载流子复合和半导体基光催化剂的有限的光吸收仍然是关键的挑战。在此，将通过静电逐层组装和牺牲模板制造的质子化的gC 3 N 4 / Ti 3 C 2 T x MXene中空球用于有效的光催化氢（H 2）演变。构造的三维（3D）空心球表现出增强的光吸收，二维（2D）异质结构以缩短电子迁移距离，肖特基结以促进电荷载流子的分离和转移以及高比表面积以实现高效H 2吸附。最佳制剂具有的H 2的982.8微摩尔克生产速率-1 ħ -1，这是超过3.5倍比H更高2质子化GC的纯产率3 Ñ 4和1.22倍比H更高2生产质子化率gC 3 N 4 / Ti 3 C2 T x，它没有空心结构。这种由2D材料制成的独特3D异质结结构改善了光催化H 2的生产性能，可以轻松扩展到其他反应。
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