One-step synthesis of Ag2S-TiO2 and its photocatalytic degradation of ethyl paraben wastewater

• DOI: 10.1007/s11356-020-07960-9
• Publication Date: 2020-04-16T16:06:48Z
• Authors: Xian Liu; Lei Zhu; Xun Wang; Xide Meng
• Keywords: Titanium; Light; Parabens; Wastewater; 01 natural sciences; Catalysis; 6. Clean water; 0104 chemical sciences

At first, naked TiO2 was prepared by sol-gel method. Silver nitrate and thiourea were respectively used as silver source and sulfur source added to form a TiO2 sol and Ag2S polymer blend system. Then, the properties of Ag2S-TiO2 was one-step synthesized and investigated by photocatalytic experiment and material characterization. According to the characterization results, Ag2S-TiO2 is anatase with a band gap of 3.14 eV, a specific surface area of 39.80 m2/g, and an average pore diameter of 3.56 nm. The results of photocatalytic experiments show that Ag2S-TiO2 can efficiently remove ethyl paraben within 2 h. Quenching experiments show that both •OH and photogenerated holes have a large effect on photocatalytic performance.