Ag/TiO2 nano thin films was found to be efficient and green heterogeneous catalyst for the synthesis of dihydropyrano[2,3-c]pyrazole derivatives via a one-pot three-component reaction between 3-methyl-1H-pyrazol-5(4H)-one or 3-methyl-1(phenyl)-pyrazol-5(4H)-one, aldehydes and malononitrile at room temperature. Ag/TiO2 and TiO2 films were prepared by spray pyrolysis technique and the effect of substrate temperature and silver incorporation on optical, morphological and structural properties were investigated by XRD, AFM, spectrophotometry and photoluminescent spectroscopy. The results of this study shows adding of Ag to TiO2 films increased the optical absorption due to plasmonic behavior of Ag free electrons. XRD analysis was revealed the Hexagonal structure with Anatase phase and 101 prefer crystal orientation which is prefer phase for photocatalyst applications.
Ag/TiO2 纳米薄膜被发现是一种高效且绿色的异相催化剂,可通过在室温下进行的三组分反应合成二氢
吡喃[2,3-c]
吡唑衍
生物,该反应涉及 3-甲基-1H-
吡唑-5(4H)-酮或 3-甲基-1(苯基)-
吡唑-5(4H)-酮、醛和
氨基乙腈。Ag/TiO2 和 TiO2 薄膜采用喷雾热解技术制备,研究了基底温度和
银掺入对其光学、形态和结构性质的影响,采用X射线衍射(XRD)、原子力显微镜(A
FM)、光谱光度法和荧光光谱法进行分析。本研究结果表明,向 TiO2 薄膜中添加 Ag 增加了光学吸收,这是由于 Ag 自由电子的等离子体行为。XRD 分析显示出六角结构,具有
锐钛矿相和以101为优选晶体取向,这一相是光催化应用的优选相。