Xiao Yawei, Wang Ke, Yang Zekang, Xing Zipeng, Li Zhenzi, Pan Kai, Zhou Wei
Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, PR China.
Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, PR China.
J Hazard Mater. 2021 Jul 15;414:125487. doi: 10.1016/j.jhazmat.2021.125487. Epub 2021 Feb 24.
Plasma Cu-decorated TiO/CoP particle-level hierarchical heterojunction photocatalysts with surface engineering were fabricated through solvothermal and solid phase reduction strategies. The CoP nanoparticles not only serve as a cost-effective cocatalyst but also provide abundant surface active sites, which facilitate rapid transfer of photogenerated carriers. The Ti and oxygen vacancy defects extend photoresponse from UV to visible light region, and enhance the separation efficiency of photogenerated carriers efficiently. Because of surface plasma resonance (SPR) of Cu, Cu/TiO/CoP with average particle size of 100-200 nm has significant photothermal effect, in which the temperature of Cu/TiO/CoP is increased by 76 °C with irradiation for 30 s, ~ 8 times higher than that of the original TiO. Cu/TiO/CoP exhibits a high photocatalytic degradation rates for highly toxic 2,4-dichlorophenol (99.2%) and 2,4,6-trichlorophenol (98.5%), which higher 7.6 and 8.9 times than the initial TiO, respectively. Thanks to the particle-level hierarchical heterojunction, the efficient surface engineering and SPR effect favoring the spatial charge separation, Cu/TiO/CoP shows excellent photocatalytic-photothermal Performance. This particle-level hierarchical heterojunction architectural design provides a new insight for synthesizing particulate photocatalysts with high-efficiency.
通过溶剂热法和固相还原策略制备了具有表面工程的等离子体铜修饰的TiO/CoP颗粒级分层异质结光催化剂。CoP纳米颗粒不仅作为一种经济高效的助催化剂，还提供了丰富的表面活性位点，促进了光生载流子的快速转移。Ti和氧空位缺陷将光响应从紫外光区域扩展到可见光区域，并有效地提高了光生载流子的分离效率。由于Cu的表面等离子体共振（SPR），平均粒径为100-200nm的Cu/TiO/CoP具有显著的光热效应，其中Cu/TiO/CoP在光照30s后温度升高76°C，比原始TiO高约8倍。Cu/TiO/CoP对剧毒的2,4-二氯苯酚（99.2%）和2,4,6-三氯苯酚（98.5%）表现出高光催化降解率，分别比初始TiO高7.6倍和8.9倍。得益于颗粒级分层异质结、有利于空间电荷分离的高效表面工程和SPR效应，Cu/TiO/CoP表现出优异的光催化-光热性能。这种颗粒级分层异质结结构设计为合成高效颗粒光催化剂提供了新的思路。
