Ji Tingting, Wang Changdi, Han Yuchen, Liu Qian, Li Lu, Zhao Ruiyang, Han Jishu, Wang Lei
Key Laboratory of Eco-chemical Engineering, Ministry of Education, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
J Colloid Interface Sci. 2025 Jan;677(Pt B):922-932. doi: 10.1016/j.jcis.2024.08.125. Epub 2024 Aug 16.
The growing demand for clean and sustainable energy has driven extensive research into efficient photocatalysts for hydrogen production. However, many semiconductor photocatalysts in this field still face the challenges such as wide band gap, limited visible light absorption, and inefficient separation and transport of photoinduced charges. In this study, nickel-cobalt layered double hydroxide (NiCo-LDH) was synthesized using an "etch-and-grow" method with zeolitic imidazolate framework-67 (ZIF-67) as a sacrificial template, followed by high-temperature calcination to produce nickel-cobalt mixed metal oxide (NiCo-MMO). ZnCdS quantum dots were used to modify NiCo-MMO resulting in a hollow dodecahedral ZnCdS@NiCo-MMO composite photocatalyst. In hydrogen production performance test, the optimized ZnCdS@NiCo-MMO exhibited excellent performance (8177.5 μmol·g·h) and demonstrated good cycling stability. The hollow dodecahedral structure of the ZnCdS@NiCo-MMO enhanced the light trapping ability and provided large surface area. The p-n heterojunction formed within ZnCdS@NiCo-MMO accelerated carrier separation and transfer, effectively inhibited the recombination of photogenerated electrons and holes, and significantly improved the hydrogen production activity.
对清洁和可持续能源日益增长的需求推动了对用于制氢的高效光催化剂的广泛研究。然而，该领域中的许多半导体光催化剂仍面临诸如宽带隙、可见光吸收有限以及光生电荷的分离和传输效率低下等挑战。在本研究中，以沸石咪唑酯骨架-67（ZIF-67）为牺牲模板，采用“蚀刻-生长”法合成了镍钴层状双氢氧化物（NiCo-LDH），随后进行高温煅烧以制备镍钴混合金属氧化物（NiCo-MMO）。使用ZnCdS量子点对NiCo-MMO进行修饰，得到中空十二面体ZnCdS@NiCo-MMO复合光催化剂。在制氢性能测试中，优化后的ZnCdS@NiCo-MMO表现出优异的性能（8177.5 μmol·g·h），并具有良好的循环稳定性。ZnCdS@NiCo-MMO的中空十二面体结构增强了光捕获能力并提供了大表面积。ZnCdS@NiCo-MMO内形成的p-n异质结加速了载流子的分离和转移，有效抑制了光生电子和空穴的复合，并显著提高了制氢活性。
