负载在 g-C3N4 上的双金属 CoZn 金属有机骨架衍生的 CoZnS@NSC 助催化剂，可显着增强光催化产氢,Inorganic Chemistry Frontiers

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负载在 g-C3N4 上的双金属 CoZn 金属有机骨架衍生的 CoZnS@NSC 助催化剂，可显着增强光催化产氢
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2024-04-24 , DOI: 10.1039/d4qi00644e
Xiao-Jie Lu ₁ , Ikram Ullah ₁ , Jing-Han Li ₁ , Shuai Chen ₁ , Cheng-Zong Yuan ₂ , An-Wu Xu ₁

Affiliation

_{石墨氮化碳(gC 3} N ₄ )基光催化制氢(H ₂ )中存在的主要问题包括光生载流子分离和转移不良以及光吸收低。因此，构建多组分助催化剂及其与gC ₃ N ₄的集成以促进光生载流子的传输和分离被认为是增强光催化H ₂生产活性的有前景的方法。在这项研究中，我们报道了由 CoZn-MOF 衍生的 CoS ₂、Co ₃ S ₄和 ZnS构建的 CoZnS@NSC- X /gC ₃ N ₄（其中X表示硫化时间为 15、30、45 和 60 分钟）纳米复合材料插层氮/硫掺杂碳（CoZnS@NSC）纳米粒子助催化剂和gC ₃ N ₄用于水分解生产H ₂ 。 CoZnS@NSC-15/gC ₃ N ₄异质结构的最大光催化H ₂析出速率（610.8 μmol h ^-1 g ^-1 ）在优化的CoZnS@NSC负载量为10 wt%和硫化15分钟的情况下接近3.7分别是未硫化CoZn@NC/gC ₃ N ₄和裸gC ₃ N ₄的290.9倍。这种显着提高的光催化性能归因于电子-空穴（e ^- /h ⁺）对的有效分离和转移以及适当的硫化时间和 CoZnS@NSC 纳米粒子的负载量引起的电子传导性。这项工作提供了一种简单的方法来设计金属有机骨架衍生的助催化剂改性的半导体光催化剂，以在实际应用中实现高性能。

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A bimetallic CoZn metal–organic-framework derived CoZnS@NSC Co-catalyst loaded on g-C3N4 for significantly augmented photocatalytic H2 evolution

The main existing issues in graphitic carbon nitride (g-C₃N₄) based photocatalytic hydrogen (H₂) production include poor separation and transfer of photogenerated charge carriers and low optical absorption. Thus, the construction of a multicomponent co-catalyst and its integration with g-C₃N₄ to facilitate the transport and separation of photoexcited charge carriers are regarded as a promising approach for augmenting the photocatalytic H₂ production activity. In this study, we report CoZnS@NSC-X/g-C₃N₄ (where X indicates sulfidation times of 15, 30, 45, and 60 min) nanocomposites constructed from a CoZn-MOF derived CoS₂, Co₃S₄ and ZnS intercalated nitrogen/sulfur-doped carbon (CoZnS@NSC) nanoparticle co-catalyst and g-C₃N₄ for H₂ production from water splitting. The maximum photocatalytic H₂ evolution rate (610.8 μmol h⁻¹ g⁻¹) of the CoZnS@NSC-15/g-C₃N₄ heterostructure, with an optimized CoZnS@NSC loading of 10 wt% and 15 min sulfidation, is nearly 3.7 and 290.9 times higher than those of unsulfidated CoZn@NC/g-C₃N₄ and bare g-C₃N₄, respectively. This significantly boosted photocatalytic performance is attributed to the efficient separation and transfer of electron–hole (e⁻/h⁺) pairs and electronic conductivity caused by the appropriate sulfidation time and loading amount of CoZnS@NSC nanoparticles. This work offers a facile approach to designing metal–organic framework derived co-catalyst modified semiconductor-based photocatalysts for high-performance in practical applications.

更新日期：2024-04-24

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