title: Reactivity and mechanistic insight into Visible-light-Induced anerobic selective reaction by Ag/brookite titania.
abstract: Ag-loaded brookite titania (Ag/TiO2(B)) nanocomposites were prepared via photochemical reduction using silver acetate and pure TiO2(B) as precursor. The samples were characterized by X-ray diffraction spectrometry (XRD), ultraviolet-visible diffuse reflectance spectrometry (UV-vis DRS), transmission electron microscopy (TEM) and photoluminescence spectra (PL). Photocatalytic degradation of Rhodamine B (Rh B) and photocatalytic oxidation of benzyl alcohol served as a probe reaction to evaluate the photocatalytic activity of the as-prepared nanocomposites under visible light irradiation(lambda > 400 nm). The results indicate different Ag loading amount influence the activity of the samples, among which Ag/TiO2(B) with 2.5 wt% Ag content exhibited the best photodegradation activity of Rh B as well as the highest selectivity for photocatalytic oxidation of benzyl alcohol. The effect of Ag loading and reaction substrates on the performance of Ag/TiO2(B) is investigated in detail. Based on the characterization results and frontier electron density theory (FED) calculation, possible mechanism of the photocatalytic oxidation of benzyl alcohol by photo-generated holes is discussed.
authors: School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
authors: Xiaojun
authors: X
authors: Wei
authors: Xiaomeng
authors: X
authors: Lü
authors: Ziwei
authors: Z
authors: Wu
authors: Jiyun
authors: J
authors: Ding
authors: Jimin
authors: J
authors: Xie
authors: Wei
authors: W
authors: Wei
authors: Danjun
authors: D
authors: Mao