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无定形结构TiO2纳米管阵列(titania nanotube arrays,TNA)在浸泡AgNO3溶液后,再经适当的热处理,不仅可使TNA的晶体结构转变为锐钛矿型或金红石型,还可以制得海绵状TiO2-Ag复合涂层。深入研究了AgNO3溶液浓度、热处理温度等对TiO2-Ag复合涂层结构和光催化制氢性能影响的影响。研究结果表明,AgNO3溶液浓度对TiO2-Ag复合涂层形貌结构和晶体结构具有重要影响。当AgNO3溶液浓度为0.1~0.5 mol/L、热处理温度为500℃时,可制得海绵状TiO2-Ag复合涂层,该涂层在紫外-可见光光照条件下,光催化制氢速率为2.14μmol/cm2·h。
After titania nanotube arrays (TNAs) are immersed in AgNO3 solution, proper heat treatment can not only transform the crystal structure of TNA into anatase or rutile, but also make sponge TiO2 -Ag composite coating. The effect of concentration of AgNO3 solution and heat treatment temperature on the structure of TiO2-Ag composite coating and the photocatalytic hydrogen production was deeply studied. The results show that the concentration of AgNO3 solution has an important influence on the morphology and crystal structure of TiO2-Ag composite coatings. When the concentration of AgNO3 solution is 0.1-0.5 mol / L and the heat treatment temperature is 500 ℃, the sponge TiO2-Ag composite coating can be obtained. The photocatalytic hydrogen production rate of the coating is 2.14 μmol under UV-visible light irradiation / cm2 · h.