Prolonged electron lifetime in sulfur vacancy-rich ZnCdS nanocages by interstitial phosphorus doping for photocatalytic water reduction,Materials Chemistry Frontiers

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Prolonged electron lifetime in sulfur vacancy-rich ZnCdS nanocages by interstitial phosphorus doping for photocatalytic water reduction
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2020-08-25 , DOI: 10.1039/d0qm00464b
Qiaohong Zhu _{1,

2,

3,

4,

5} , Zehong Xu _{1,

2,

3,

4,

5} , Qiuying Yi _{1,

2,

3,

4,

5} , Muhammad Nasir _{6,

7,

8} , Mingyang Xing _{1,

2,

3,

4,

5} , Bocheng Qiu _{1,

2,

3,

4,

5} , Jinlong Zhang _{1,

2,

3,

4,

5}

Affiliation

Hollow metal sulfides have been extensively investigated as photocatalysts for the hydrogen evolution reaction (HER) due to their enhanced light harvesting ability and sufficient catalytic sites. However, their HER performance is still limited owing to the unavoidably photogenerated charge carrier recombination. Herein, we design a sulfur vacancy-rich ZnCdS nanocage photocatalyst with interstitial phosphorus doping (P-ZnCdS) by using zeolitic-imidazolate-framework-8 (ZIF-8) rhombic dodecahedrons as the template. Interstitial P doping endows P-ZnCdS with a promoted Fermi level, which shortens the distance between the Fermi level and S vacancy level, thus facilitating the S vacancy level to be an effective electron trapping center and improving the separation efficiency of electron–hole pairs. As expected, the HER performance of the P-ZnCdS nanocages is dramatically enhanced to nearly 57.21 μmol h⁻¹ when compared to that of pristine ZnCdS nanocages (21.58 μmol h⁻¹). This work underscores the way to design high-performance photocatalysts using the interstitial P doping strategy.

中文翻译：

间隙磷掺杂用于光催化减水的富硫空位ZnCdS纳米笼中延长了电子寿命

中空金属硫化物由于其增强的光收集能力和足够的催化位点，已被广泛地研究用作氢释放反应（HER）的光催化剂。然而，由于不可避免的光生载流子复合，它们的HER性能仍然受到限制。在此，我们以沸石-咪唑盐骨架8（ZIF-8）菱形十二面体为模板，设计了间隙磷掺杂（P-ZnCdS）的富硫空位ZnCdS纳米笼型光催化剂。间隙P掺杂赋予P-ZnCdS增强的费米能级，从而缩短了费米能级和S空位之间的距离，从而促进了S空位成为有效的电子俘获中心并提高了电子-空穴对的分离效率。不出所料^-1相比原始ZnCdS纳米笼的时（21.58微摩尔ħ^-1）。这项工作强调了使用间隙P掺杂策略设计高性能光催化剂的方法。

更新日期：2020-09-14

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