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| The investigation on the preparation, characterization and photocatalytic NO purification performance of La(OH)3 nanorods |
| SUN Yan-juan1, XIAO Xiang1, DONG Fan1, HO Wing-kei2, WU Zhong-biao3 |
1. Chongqing Key Laboratory of Catalysis and New Environmental Materials, College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China;
2. Department of Science and Environmental Studies, The Hong Kong Institute of Education, HongKong, China;
3. Key Laboratory of Polluted Environment Remediation and Ecological Health of Ministry of Education, Department of Environmental Engineering, Zhejiang University, Hangzhou 310027, China |
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Abstract The one dimensional La(OH)3 nanorods were synthesized by a hydrothermal method, and the microstructure of was characterized with XRD, SEM, TEM, XPS and UV-vis DRS. The as-prepared samples were applied in photocatalytic NO purification. The results indicated that the La(OH)3 nanorods have uniform morphology and could absorb UV light. The hydrothermal temperature exerted a great influence on the microstructure and photocatalytic activity of La(OH)3 nanorods. The highest photocatalytic performance and stability can be achieved when the temperature is controlled at 180℃ (La-180). The ESR trapping experiment showed that the signal of ·OH radicals produced by La-180was stronger than that of La-150 and La-210, thus La-180 demonstrated highly enhanced photocatalytic activity. The enhanced generation of ·OH radicals by La-180 was associated with the enhanced UV-light absorption, uniform morphology of La-180 with enhanced charge separation efficiency and large specific surface areas providing more surface active sites.
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Received: 19 July 2016
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