Preparation of superhydrophobic CdS cotton using visible light response and its application for the control of water pollution

• 来源期刊: 中国科学:技术科学（英文版）
• 年，卷（期）: 2019,（12）
• 页码范围: 2236-2242
• 页数: 7页
• 语种: 英文

摘要

Sewage discharge produced by homes and industries contains both oil and water-soluble components.In order to remove oil from water,materials with specific wettability can be used;however,these materials cannot remove dissolved contaminants from water.In this research,we prepared a superhydrophobic CdS cotton for water purification.This material has the ability to adsorb different types of oil due to its non-wettability (WCA =152°).Moreover,its response behavior towards visible light enables it to remove water-soluble pollutants as well.The highest oil absorption rate of superhydrophobic CdS cotton is nearly 30 times,and it can absorb light below 564 nm and produce ·OH to degrade water soluble pollutants.Finally,based on Mott-Schottky curve,the position of Fermi energy level was determined (-0.55 eV).Also,the positions of valence and conduction bands were calculated based on the analysis of band gap which helps in proving photoelectric response characteristics.