Phthalocyanine-sensitized hollow ZnO spheres as an efficient visiblie-light photocatalyst for water treatment

Cong Liu,Qian Duan

doi:10.1051/e3sconf/202019404057

Abstract

A novel phthalocyanine-sensitized hollow ZnO spheres as an efficient visiblie-light photocatalyst had been prepared successfully. Firstly, a unique hollow ZnO microsphere had been prepared by a facile solvothermal method followed by calcination. Secondly, zinc-tetracarboxyl-phthalocyanine (Pc) impregnated onto the surface of hollow ZnO microsphere. The obtained photocatalyst Pc/ZnO was characterized by XRD, SEM and EDS. The hollow Pc/ZnO hierarchical nanostructure improved the electron-hole separation more effectively and Pc loaded on the surface of ZnO microsphere to enhance photocatalytic activity under visible light. In our photocatalytic experiments, the hollow Pc/ZnO microsphere showed excellent photocatalytic performance under visible light for the removal of Rhodamine B (RhB). As a result, our work provided an effective and green photocatalyst for water treatment.

Highlights

IntroductionVarious pollutants (e.g., dyes, pharmaceuticals and heavy ions), which are produced by many industries, are seriously considered as major pollutants in water pollution [1]
In the modern society, various pollutants, which are produced by many industries, are seriously considered as major pollutants in water pollution [1]
2.3 Photocatalytic experiments A 300 W xenon lamp with filter acted as visible light source. 10 mg Pc/ZnO was suspended in Rhodamine B (RhB) solution (1.0×10-5mol/L, 30 mL)

Summary

Introduction

Various pollutants (e.g., dyes, pharmaceuticals and heavy ions), which are produced by many industries, are seriously considered as major pollutants in water pollution [1]. They threaten human health and living environment. Hollow ZnO microsphere with adjustable morphology and size has attracted more attentions due to its more active sites and larger surface areas [3]. Among various methods to overcome above shortcomings, phthalocyanine-sensitized ZnO seems to be a facile way to expand absorption light range and improve the photocatalytic activity [6]. Benefiting from the unique design, the obtained photocatalyst exhibited better photocatalytic activity under visible light irradiation. This study provided a new strategy for water treatment

Experiment

Results and discussion

Conclusion