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
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.
孙艳娟, 肖香, 董帆, 何詠基, 吴忠标. La（OH）3纳米棒的制备、表征及光催化净化NO的性能[J]. 中国环境科学, 2017, 37(3): 899-907.
SUN Yan-juan, XIAO Xiang, DONG Fan, HO Wing-kei, WU Zhong-biao. The investigation on the preparation, characterization and photocatalytic NO purification performance of La(OH)3 nanorods. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(3): 899-907.
Stouwdam J W, Huskens J, Van Veggel F C J M, Lanthanide-doped nanoparticles with excellent luminescent properties in organic media [J]. Chem. Mater., 2003,15:4604-4616.
[3]
Dong F, Xiao X, Jiang G G, et al. Surface oxygen-vacancy induced photocatalytic activity of La(OH)3 nanorods prepared by a fast and scalable method [J]. Phys. Chem. Chem. Phys., 2015, 17:16058-16066.
Wang Y, Liu S, Cai Y, et al. La(OH)3:Ln3+ (Ln=Sm, Er, Gd, Dy, and Eu) nanorods synthesized by a facile hydrothermal method and their enhanced photocatalytic degradati on of Congored in the aqueous solution [J]. Ceram. Int., 2014,40:5091-5095.
[9]
Tang B, Ge J C, Wu C J, et al. Sol-solvothermal synthesis and microwave evolution of La(OH)3 nanorods to La2O3 nanorods [J]. Nanotechnology, 2004,15:1273-1276.
[10]
Jia G, Huang Y J, Song Y H, et al. Controllable Synthesis and Luminescence Properties of La(OH)3 and La(OH)3:Tb3+ Nanocrystals with Multiform Morphologies [J]. Eur. J. Inorg. Chem., 2009,2009:3721-3726.
[11]
Hu C G, Liu H, Dong W T, et al. La(OH)3 and La2O3 nanobelts: synthesis and physical properties [J]. Adv. Mater., 2007,19:470-474.
Yan M C, Chen F, Zhang J L, et al. Preparation of controllable crystalline titania and study on the photocatalytic properties [J]. J. Phys. Chem. B, 2005,109:8673-8678.
[14]
Wong H, Iwai H, Kakushima K, et al. XPS Study of the bonding properties of lanthanum oxide/silicon interface with a trace amount of nitrogen incorporation [J]. J. Electrochem. Soc., 2010, 157:G49-G52.
Yu J G, Xiang Q J, Zhou M H. Preparation, characterization and visible-light-driven photocatalytic activity of Fe-doped Titania nanorods and first-principles study for electronic structures [J]. Appl. Catal. B, 2009,90:595-602.
[17]
Wu Z B, Don F, Liu Y, et al. Enhancement of the visible light photocatalytic performance of C-doped TiO2 by loading with V2O5 [J]. Catal. Commun., 2009,11:82-86.
[18]
Dong F, Feng X, Zhang Y X, et al. An anion-exchange strategy for 3D hierarchical (BiO)2CO3/amorphous Bi2S3heterostructures with increased solar absorption and enhanced visible light photocatalysis [J]. RSC Adv., 2015,5:11714-11723.
[19]
Dong F, Wang Z Y, Li Y H, et al. Immobilization of polymeric g-C3N4 on structured ceramic foam for efficient visible light photocatalytic air purification with real indoor illumination [J]. Environ. Sci. Technol., 2014,4817:10345-10353.
[20]
Dong F, Ho W K, Lee S C et al. Template-free fabrication and growth mechanism of uniform (BiO)2CO3 hierarchical hollow microspheres with outstanding photocatalytic activities under both UV and visible light irradiation [J]. J. Mater. Chem., 2011, 21:12428-12436.
[21]
Xiong T, Huang H W, Sun Y J, et al. In situ synthesis of a C-Doped (BiO)2CO3 hierarchical self-assembly effectively promoting visible light photocatalysis [J]. J. Mater. Chem. A, 2015,3:6118-6127.
[22]
Tian N, Huang H W, Liu C Y, et al. In situ co-pyrolysis fabrication of CeO2/g-C3N4n-n type heterojunction for synchronously promoting photo-induced oxidation and reduction properties [J]. J. Mater. Chem. A, 2015,3:17120-17129.
[23]
Xu T G, Zhang L W, Cheng H Y, et al. Significantly Enhanced Photocatalytic Performance of ZnO via Graphene Hybridization and the Mechanism Study [J]. Appl. Catal. B, 2011,101:382-387.
[24]
Liang J, Cao Y Q, Lin H, et al. A template-free solution route for the synthesis of well-formed One-dimensional Zn2GeO4 nanocrystals and its photocatalytic behavior [J]. Inorg. Chem., 2013,52:6916-6922.
[25]
Zhou Y, Zhang X J, Zhang Q, et al. Role of graphene on the band structure and interfacial interaction of Bi2WO6/graphene composites with enhanced photocatalytic oxidation of NO [J]. J. Mater. Chem. A, 2014,2:16623-16631.
