title: Preparation of (5.0%)Er3+:Y3Al5O12/Pt-(TiO2-Ta2O5) nanocatalysts and application in sonocatalytic decomposition of ametryn in aqueous solution.
abstract: (5.0%)Er3+:Y3Al5O12/Pt-(TiO2-Ta2O5) powder, as a high effective sonocatalyst, was prepared using sol-gel and calcination method. Then it was characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDX). In order to evaluate the sonocatalytic activity of the prepared (5.0%)Er3+:Y3Al5O12/Pt-(TiO2-Ta2O5) powder, the sonocatalytic decomposition of ametryn was studied. In addition, some influencing factors such as different Ti/Ta molar ratios on the sonocatalytic activity of the prepared (5.0%)Er3+:Y3Al5O12/Pt-(TiO2-Ta2O5) powder, catalyst added amount with ultrasonic irradiation time and used times on the sonocatalytic decomposition efficiency were examined by using ion chromatogram determination. The experimental results showed that the best sonocatalytic decomposition ratio of ametryn were 77.50% based on the N atom calculation and 95.00% based on the S atom calculation, respectively, when the conditions of 10.00mg/L initial concentration, 1.00g/L prepared (5.0%)Er3+:Y3Al5O12/Pt-(TiO2-Ta2O5) powder (Ti/Ta=1.00:0.25 heat-treated at 550°C for 3.0h) added amount, 150min ultrasonic irradiation (40kHz frequency and 300W output power), 100mL total volume and 25-28°C temperature were adopted. Therefore, the (5.0%)Er3+:Y3Al5O12/Pt-(TiO2-Ta2O5) composite nanoparticles could be considered as an effective sonocatalyst for decomposition of ametryn in aqueous solution.
authors: College of Environment, Liaoning University, Shenyang 110036, PR China.
authors: Guanshu
authors: G
authors: Li
authors: College of Chemistry, Liaoning University, Shenyang 110036, PR China.
authors: Hongbo
authors: H
authors: Zhang
authors: College of Chemistry, Liaoning University, Shenyang 110036, PR China; National Police University of China, Shenyang 110854, PR China.
authors: Chunsheng
authors: C
authors: Wei
authors: College of Chemistry, Liaoning University, Shenyang 110036, PR China.
authors: Yingying
authors: Y
authors: Huang
authors: College of Environment, Liaoning University, Shenyang 110036, PR China.
authors: Xuekai
authors: X
authors: Dou
authors: College of Environment, Liaoning University, Shenyang 110036, PR China.
authors: Yidi
authors: Y
authors: Wang
authors: College of Environment, Liaoning University, Shenyang 110036, PR China; College of Chemistry, Liaoning University, Shenyang 110036, PR China. Electronic address: wangjun888tg@126.com.
authors: Jun
authors: J
authors: Wang
authors: College of Environment, Liaoning University, Shenyang 110036, PR China. Electronic address: ysong_tg@126.com.
authors: Youtao
authors: Y
authors: Song
keywords: Ametryn; Sonocatalytic decomposition; TiO(2)-Ta(2)O(5) composite; Ultrasonic irradiation