Journal of Colloid and Interface Science ( IF 9.4 ) Pub Date : 2023-03-15 , DOI: 10.1016/j.jcis.2023.03.068 Yanbing Li 1 , Zhiliang Jin 2 , Noritatsu Tsubaki 3
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Although Prussian blue and its analogs (PB/PBAs) have open framework structures, large surface areas, uniform metal active sites, and tunable compositions, and have been investigated for a long time, owing to their unfavorable visible light responsiveness, they rarely been reported in photocatalysis. This largely limits their applications in solar-to-chemical energy conversion. Here, a continuous-evolution strategy was conducted to convert the poor-performance NiCo PBA (NCP) toward high-efficiency complex photocatalytic nanomaterials. First, chemical etching was performed to transform raw NCP (NCP-0) to hollow-structured NCP (including NCP-30, and NCP-60) with enhanced diffusion, penetration, mass transmission of reaction species, and accessible surface area. Then, the resultant hollow NCP-60 frameworks were further converted into advanced functional nanomaterials including CoO/3NiO, NiCoP nanoparticles, and CoNi2S4 nanorods with a considerably improved photocatalytic H2 evolution performance. The hollow-structured NCP-60 particles exhibit an enhanced H2 evolution rate (1.28 mol g-1h−1) compared with the raw NCP-0 (0.64 mol g-1h−1). Furthermore, the H2 evolution rate of the resulting NiCoP nanoparticles reached 16.6 mol g-1h−1, 25 times that of the NCP-0, without any cocatalysts.
中文翻译:
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用于改进太阳能驱动水分解应用的镍钴普鲁士蓝类似物的化学蚀刻和相变
尽管普鲁士蓝及其类似物(PB/PBAs)具有开放的骨架结构、大的比表面积、均匀的金属活性位点和可调的成分,并被研究了很长时间,但由于其不利的可见光响应性,很少被报道在光催化中。这在很大程度上限制了它们在太阳能-化学能转换中的应用。在这里,进行了连续进化策略,将性能差的 NiCo PBA (NCP) 转化为高效的复合光催化纳米材料。首先,进行化学蚀刻以将原始 NCP (NCP-0) 转化为中空结构的 NCP(包括 NCP-30 和 NCP-60),具有增强的扩散、渗透、反应物质的传质和可及表面积。然后,2 S 4纳米棒具有显着改善的光催化H 2释放性能。与原始 NCP-0 (0.64 mol g -1 h -1 ) 相比,中空结构的 NCP-60 颗粒表现出更高的 H 2释放速率 (1.28 mol g -1 h -1 )。此外,在没有任何助催化剂的情况下,所得 NiCoP 纳米粒子的 H 2释放速率达到 16.6 mol g -1 h -1,是 NCP-0 的 25 倍。