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中文摘要：
采用水热法合成了一维La（OH）3纳米棒光催化剂,通过XRD,SEM,TEM,XPS,UV-vis DRS等对样品进行结构表征,并研究了其光催化净化NO的性能.结果表明,La（OH）3纳米棒具有均匀的形貌结构,且对紫外光有较强吸收,水热温度对La（OH）3纳米棒微结构和光催化活性有较大影响.水热温度为180℃下样品（La-180）光催化活性最佳且稳定性良好.ESR捕获结果表明,La-180产生的· OH信号强于La-150和La-210,因而具备更优异的光催化活性.La-180产生更多· OH的原因是其UV光吸收增加;La-180纳米棒形貌均一无团聚,增强了电荷分离效率;且La-180具有较大比表面积,增加了催化剂表面活性位点.
英文摘要：
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）3nanorods. 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-180 was 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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