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Twinned crystal Cd0.9Zn0.1S/MoO3 nanorod S-scheme heterojunctions as promising photocatalysts for efficient hydrogen evolution
Dalton Transactions ( IF 4 ) Pub Date : 2024-05-03 , DOI: 10.1039/d4dt00585f
Jie Chen 1 , Ying Xie 1 , Haitao Yu 1 , Zhenzi Li 2 , Wei Zhou 2
Affiliation  

Leveraging solar energy through photocatalytic hydrogen production from water stands out as one of the most promising approaches to address the energy and environmental challenges. The choice of catalyst profoundly influences the outcomes of photocatalytic reactions, and constructing heterojunctions has emerged as a widely applied strategy to overcome the limitations associated with single-phase photocatalysts. MoO3, renowned for its high chemical stability, encounters issues such as low photocatalytic efficiency and fast recombination of photogenerated electrons and holes. To tackle these challenges, the morphology of MoO3 has been controlled to form nanorods, simultaneously suppressing the aggregation of the catalyst and increasing the number of surface-active sites. Moreover, to facilitate the separation of photogenerated charge carriers, Cd0.9Zn0.1S nanoparticles with a twin crystal structure are deposited on the surface of MoO3, establishing an S-scheme heterojunction. Experimental findings demonstrate that the synergistic effects arising from the well-defined morphology and interface interactions extend the absorption range to visible light response, improve charge transfer activity, and prolong the lifetime of charge carriers. Consequently, Cd0.9Zn0.1S/MoO3 S-scheme heterojunctions exhibit outstanding photocatalytic hydrogen production performance (3909.79 μmol g−1 h−1) under visible light irradiation, surpassing that of MoO3 by nearly nine fold.

中文翻译:

孪生晶体 Cd0.9Zn0.1S/MoO3 纳米棒 S 型异质结作为有效析氢的有前途的光催化剂

通过光催化水制氢来利用太阳能是解决能源和环境挑战最有前途的方法之一。催化剂的选择深刻地影响光催化反应的结果,构建异质结已成为克服单相光催化剂相关局限性的广泛应用的策略。 MoO 3以其高化学稳定性而闻名,但遇到了诸如光催化效率低以及光生电子和空穴复合快等问题。为了应对这些挑战,控制MoO 3的形态以形成纳米棒,同时抑制催化剂的聚集并增加表面活性位点的数量。此外,为了促进光生载流子的分离,具有双晶结构的Cd 0.9 Zn 0.1 S纳米粒子沉积在MoO 3的表面上,建立S型异质结。实验结果表明,明确的形态和界面相互作用产生的协同效应将吸收范围扩大到可见光响应,提高电荷转移活性,并延长电荷载流子的寿命。因此,Cd 0.9 Zn 0.1 S/MoO 3 S型异质结在可见光照射下表现出优异的光催化产氢性能(3909.79 μmol g -1 h -1 ),超过MoO 3近九倍。
更新日期:2024-05-08
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