Synergetic Effect of Ultrasound, the Heterogeneous Fenton Reaction and Photocatalysis by TiO₂ Loaded on Nickel Foam on the Degradation of Pollutants

Shan Qiu; Shanwen Xu; Guangming Li; Jixian Yang

doi:10.3390/ma9060457

Synergetic Effect of Ultrasound, the Heterogeneous Fenton Reaction and Photocatalysis by TiO₂ Loaded on Nickel Foam on the Degradation of Pollutants

Materials (Basel). 2016 Jun 8;9(6):457. doi: 10.3390/ma9060457.

Authors

Shan Qiu^{1

2}, Shanwen Xu^{3

4}, Guangming Li⁵, Jixian Yang⁶

Affiliations

¹ School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150006, China. qiushan@hit.edu.cn.
² State Laboratory of Urban Water Resources and Environment, Harbin Institute of Technology, Harbin 150006, China. qiushan@hit.edu.cn.
³ School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150006, China. xsw1978828@126.com.
⁴ State Laboratory of Urban Water Resources and Environment, Harbin Institute of Technology, Harbin 150006, China. xsw1978828@126.com.
⁵ School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150006, China. liguangming@hit.edu.cn.
⁶ School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150006, China. yangxj@hit.edu.cn.

Abstract

The synergistic effect of ultrasound, the heterogeneous Fenton reaction and photocatalysis was studied using a nickel foam (NF)-supporting TiO₂ system and rhodamine B (RhB) as a target. The NF-supporting TiO₂ system was prepared by depositing TiO₂ on the skeleton of NF repeatedly and then calcining it. To optimize the conditions and parameters, the catalytic activity was tested in four systems (ultrasound alone (US), nickel foam (NF), US/NF and NF/US/H₂O₂). The optimal conditions were fixed at 0.1 g/mL NF, initial 5.00 mg/L RhB, 300 W ultrasonic power, pH = 3 and 5.00 mg/L H₂O₂. The effects of the dissolution of nickel from NF and quenching of the Fenton reaction were studied on degradation efficiency. When the heterogeneous Fenton reaction is combined with TiO₂-photocatalysis, the pollutant removal efficiency is enhanced significantly. Through this synergistic effect, 22% and 80% acetochlor was degraded within 10 min and 80 min, respectively.

Keywords: Fenton reaction; TiO2; acetochlor; nickel foam; photocatalysis.