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Construction of 2D/2D ZnIn2S4/Nb2CTx (MXene) hybrid with hole transport highway and active facet exposure boost photocatalytic hydrogen evolution
Journal of Colloid and Interface Science ( IF 9.4 ) Pub Date : 2024-06-20 , DOI: 10.1016/j.jcis.2024.06.139
Chao Peng 1 , Yiming Chen 2 , Xingyue Gao 2 , Ping Wei 3 , Yihao Lin 2 , Li Fu 2 , Bingpu Zhou 4 , Mengchen Zhang 1 , Jianbo Jia 1 , Tiangang Luan 1
Journal of Colloid and Interface Science ( IF 9.4 ) Pub Date : 2024-06-20 , DOI: 10.1016/j.jcis.2024.06.139
Chao Peng 1 , Yiming Chen 2 , Xingyue Gao 2 , Ping Wei 3 , Yihao Lin 2 , Li Fu 2 , Bingpu Zhou 4 , Mengchen Zhang 1 , Jianbo Jia 1 , Tiangang Luan 1
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In this study, leveraging the tunable surface groups of MXene, the two-dimensional (2D) NbC with OH terminal (NC) was synthesized. 2D ZnInS (ZIS) nanosheets were prepared with the aid of sodium citrate, enhancing the exposure ratio of active (110) facet. On this basis, 2D/2D ZnInS/NbC heterojunctions were fabricated to improve photocatalytic hydrogen evolution reaction (HER) performance. The optimized 6 wt%NbC/ZnInS-450 (6NC/ZIS-450) photocatalyt exhibits a remarkable HER rate of 3603 μmol gh, which is 10 times superior to that of the original ZnInS. Its apparent quantum efficiency (AQE) at 380 nm reaches 14.9 %. Meanwhile, even after 5 rounds of HER, the activity of 2D/2D ZnInS/NbC heterojunction remained at 90 %, far superior to that of pure ZnInS (34 % and 31 %). Energy band structure analysis and density functional theory (DFT) calculation indicate that NbC adsorbed with OH exhibit a low work function. By serving as a hole cocatalyst, it effectively boosts the photocatalytic HER rate of ZnInS/NbC heterojunction and inhibits the photocorrosion of ZnInS. This unique insight, via hole transport highways and increased exposure of active facets, effectively enhances the activity and stability of sulfides photocatalysts.
中文翻译：
构建具有空穴传输高速公路和活性面曝光的 2D/2D ZnIn2S4/Nb2CTx (MXene) 杂化材料，促进光催化析氢
在本研究中，利用 MXene 的可调表面基团，合成了带有 OH 末端 (NC) 的二维 (2D) NbC。借助柠檬酸钠制备了二维 ZnInS (ZIS) 纳米片，提高了活性 (110) 面的暴露率。在此基础上，制备了2D/2D ZnInS/NbC异质结以提高光催化析氢反应（HER）性能。优化后的 6 wt%NbC/ZnInS-450 (6NC/ZIS-450) 光催化剂表现出 3603 μmol gh 的显着 HER 速率，比原始 ZnInS 提高了 10 倍。其在380 nm处的表观量子效率（AQE）达到14.9%。同时，即使经过5轮HER，2D/2D ZnInS/NbC异质结的活性仍保持在90%，远优于纯ZnInS（34%和31%）。能带结构分析和密度泛函理论（DFT）计算表明，吸附有OH的NbC表现出较低的功函数。作为空穴助催化剂，它能有效提高ZnInS/NbC异质结的光催化HER速率并抑制ZnInS的光腐蚀。这种独特的见解，通过空穴传输高速公路和增加活性面的暴露，有效增强了硫化物光催化剂的活性和稳定性。
更新日期：2024-06-20
中文翻译：
构建具有空穴传输高速公路和活性面曝光的 2D/2D ZnIn2S4/Nb2CTx (MXene) 杂化材料，促进光催化析氢
在本研究中，利用 MXene 的可调表面基团，合成了带有 OH 末端 (NC) 的二维 (2D) NbC。借助柠檬酸钠制备了二维 ZnInS (ZIS) 纳米片，提高了活性 (110) 面的暴露率。在此基础上，制备了2D/2D ZnInS/NbC异质结以提高光催化析氢反应（HER）性能。优化后的 6 wt%NbC/ZnInS-450 (6NC/ZIS-450) 光催化剂表现出 3603 μmol gh 的显着 HER 速率，比原始 ZnInS 提高了 10 倍。其在380 nm处的表观量子效率（AQE）达到14.9%。同时，即使经过5轮HER，2D/2D ZnInS/NbC异质结的活性仍保持在90%，远优于纯ZnInS（34%和31%）。能带结构分析和密度泛函理论（DFT）计算表明，吸附有OH的NbC表现出较低的功函数。作为空穴助催化剂，它能有效提高ZnInS/NbC异质结的光催化HER速率并抑制ZnInS的光腐蚀。这种独特的见解，通过空穴传输高速公路和增加活性面的暴露，有效增强了硫化物光催化剂的活性和稳定性。
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