Enhanced Photocatalytic Properties of Surfactants Modified ZnO Particles Synthesized Directly via Sonochemistry Technique

Abstract

The preparation of ZnO with outstanding photocatalytic performance by a simple method without doping the second phase is a challenge. Herein, an environmental, friendly, simple, and quick route is proposed to synthesize the surfactant modified ZnO nanoparticles using different surfactants as the photocatalyst. Introducing the sodium dodecyl sulfate (SDS), an anionic surfactant, increases surface hydroxyl groups, enhances visible light absorption intensity, reduces oxygen defects and decreases recombination rate of photo‐generated electron/hole pairs, which significantly improves the photocatalytic properties in degradation of the rhodamine B (RhB) under visible‐light. In particular, the 6 % SDS surfactant modified ZnO samples demonstrates the excellent photodegradation performance, enabling photodegradation of RhB within 15 minutes. This work provides a new route to synthesize photocatalytic materials with excellent photodegradation performance.

Efficient molecular oxygen utilization of micelle-based BiOCl for enhanced in situ H2O2 production induced photocatalytic removal of antibiotics

“…At the same time, the coating of abundant micelles will enhance the agglomeration effect of BiOCl, increase the particle size, and reduce the surface-active sites of materials, eventually leading to a decrease in the photocatalytic activity. 61…”

“…At the same time, the coating of abundant micelles will enhance the agglomeration effect of BiOCl, increase the particle size, and reduce the surfaceactive sites of materials, eventually leading to a decrease in the photocatalytic activity. 61 Furthermore, the photodegradation of DCF was fitted to the equation: ln(C 0 /C) = kt, 28 and the kinetic rate of DCF degradation on SA-BiOCl (0.0961 min −1 ) was higher than that of BiOCl (0.00713 min −1 ), SA 0.05 -BiOCl (0.05076 min −1 ), SA 0.2 -BiOCl (0.06722 min −1 ), and SA 0.5 -BiOCl (0.00709 min −1 ) (Fig. 7b).…”