高效Mn/ZnO-Ag纳米复合光催化体系的简易制备及研究

doi:10.11896/cldb.19110052

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Abstract We demonstrated the Mn doped ZnO (Mn/ZnO) and (Mn, Ag) co-doped ZnO photocatalyst with different Mn concentrations, both samples were fabricated by facile polymer network gel method. The photocatalytic activity of the samples were characterized by the degradation of methylene blue (MB) pollutant under the simulated sunlight illumination. XRD and SEM identified that Mn doping decreased the grain size, but improved the particle distribution of the sample. XPS spectra showed the Mn²⁺ and Mn³⁺ valence states coexisted in the samples, the ratio of Mn³⁺/Mn²⁺ was raised with the increase of Mn doping amount. Comparing with pure ZnO nano-particles, the Mn/ZnO-Ag nano-particles depicted a weaker luminescence intensity, and the most effective photogenerated charge separation was emerged when Mn doping concentration reached 1mol%. The results manifested the Mn doping could significantly enhance the optical absorption in visible region, however, no significant increases of Mn doped ZnO photocatalytic activity were observed in the first order kinetic function. the Mn/ZnO-Ag simples demonstrated outstanding perfromance of photocatalytic activity while maintaining excellent optical performance. In the combination of characterization results, the improvement of photocatalytic activity of the samples was strongly influenced by the enhancement of visible utilization, the change of valence state between Mn ions and the synergy between Mn ions and Ag particles. This study provides a useful pathway to systematically enhance the photocatalytic activity of ZnO.

Key words： polymer network gel method Mn/ZnO-Ag system photocatalysis change of valence state synergistic effect

Published: 23 February 2021

CLC number:

O614

Fund:This work was financially supported by the Sichuan Province Academic and Technical Leader Training Fund (26727502), the Key Project of Applied Basic Research of Sichuan Science and Technology Department (2017JY0349) and Southwest Minzu University Graduate Innovative Research Fund (CX2019SZ17).

Corresponding Authors: hsuming_2001@aliyun.com

About author:: Jing Li, a master student in materials science at Southwest Minzu University, is engaged in the research of oxide functional materials.
Ming Xu received his Ph.D. degree in Condensed Physics from Institute of Physics (CAS) in 2000. He is currently a professor of physics in Southwest University for Nationalities. His research interests are photoelectric functional nanomaterials and devices.

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	LI Jing
	LUO Kaiyi
	HU Wenyu
	LIU Yutong
	YUAN Huan
	ZHANG Qiuping
	WANG Xiaoyi
	XU Ming

Cite this article:

LI Jing,LUO Kaiyi,HU Wenyu, et al. Facile Synthesis and Study of High-efficiency Mn/ZnO-Ag Nano-composite Photocatalytic System[J]. Materials Reports, 2021, 35(4): 4017-4022.

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http://www.mater-rep.com/EN/10.11896/cldb.19110052 OR http://www.mater-rep.com/EN/Y2021/V35/I4/4017

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