摘要
为了获得同时具有红外遮蔽和光催化性能的钾钨青铜(KxWO3)粉体,以硫酸钾和钨酸钠为原料,草酸作诱导剂,通过溶剂热反应及还原气氛热处理合成了钾钨青铜粉体。利用XRD、TEM对所得KxWO3样品进行了表征,通过紫外/可见/近红外分光光度计及多功能光化学反应仪测试其近红外遮蔽性能和光催化性能。XRD、TEM测试结果表明,钾钨青铜粉体的主晶相为K0.32WO3,粒径范围为5~80 nm;红外屏蔽性能测试结果表明,以浓度1.1 mol/L的草酸诱导合成的钾钨青铜粉体红外屏蔽性能最佳,在1 100 nm波长处的屏蔽率可达82%。此外,光催化实验结果表明,钾钨青铜粉体降解罗丹明B速率高于铯钨青铜,光催化性能更优,因而在透明隔热及自洁玻璃领域具有较好的应用前景。
Potassium tungsten bronze powder was synthesized by solvothermal reaction and reduction treatment using potassium sulphate and sodium tungstate as raw materials and oxalic acid as an inducer. KxWO3 samples were characterized by X ray diffraction(XRD), transmission electron microscopy(TEM), UV/Vis/NIR spectrophotometer and multifunctional photochemical reactor. XRD and TEM results indicated that the crystal phase of as-obtained sample is mainly K0.32WO3, and the particle size range is 5 to 80 nm. The result of infrared shielding showed that the potassium tungsten bronze powder synthesized by oxalic acid at 1.1 mol/L concentration has the best infrared shielding performance, and the shielding rate can reach to 82% at 1 100 nm wavelength. The photocatalytic experiment shows that the potassium tungsten bronze powder has higher degradation rate to rhodamine B and better photocatalytic performance than that of cesium tungsten bronze. KxWO3 has a good application prospect in the field of transparent heat insulation and self-cleaning glass.
作者
宋昕
乔玉婷
刘敬肖
史非
冉帅
SONG Xin;QIAO Yuting;LIU Jingxiao;SHI Fei;RAN Shuai(School of Textiles and Materials Engineering,Dalian Polytechnic University,Dalian 116034,China;FAW-Volkswagen Automotive Company Limited,Changchun 130011,China)
出处
《大连工业大学学报》
CAS
北大核心
2019年第6期448-452,共5页
Journal of Dalian Polytechnic University
基金
国家自然科学基金项目(51778098)
住房城乡建设部科学技术项目(2015-K1-042)
大连市科技发展补助资金项目(2016-415)
大连市科技创新基金计划项目(2018J12SN066)
关键词
钾钨青铜
草酸
透明隔热涂层
近红外屏蔽
光催化
KxWO3
oxalic acid
transparent thermal insulation
NIR shielding
photocatalysis
