Construction of Highly Active Zn3In2S6 (110)/g-C3N4 System by Low Temperature Solvothermal for Efficient Degradation of Tetracycline under Visible Light

Abstract

Herein, Zn3In2S6 photocatalyst with (110) exposed facet was prepared by low temperature solvothermal method. On this basis, a highly efficient binary Zn3In2S6/g-C3N4 was obtained by low temperature solvothermal method and applied to the degradation of tetracycline (TC). The samples of the preparation were characterized by X-ray diffraction, scanning electron microscope, transmission electron microscope, UV–vis diffuse reflection spectroscopy, and photoluminescence spectroscopy. Furthermore, the degradation performance of photocatalysts on TC was investigated under different experimental conditions. Finally, the mechanism of Zn3In2S6/g-C3N4 composite material degrading TC is discussed. The results show that Zn3In2S6 and Zn3In2S6/g-C3N4 photocatalysts with excellent performance could be successfully prepared at lower temperature. The Zn3In2S6/g-C3N4 heterojunction photocatalyst could significantly improve the photocatalytic activity compared with g-C3N4. After 150 min of illumination, the efficiency of 80%Zn3In2S6/g-C3N4 to degrade TC was 1.35 times that of g-C3N4. The improvement of photocatalytic activity was due to the formation of Zn3In2S6/g-C3N4 heterojunction, which promoted the transfer of photogenerated electron–holes. The cycle experiment test confirmed that Zn3In2S6/g-C3N4 composite material had excellent stability. The free radical capture experiment showed that ·O2− was the primary active material. This study provides a new strategy for the preparation of photocatalysts with excellent performance at low temperature.

Graphitic Carbon Nitride/Zinc Oxide-Based Z-Scheme and S-Scheme Heterojunction Photocatalysts for the Photodegradation of Organic Pollutants

“…To obtain these properties, various attempts have been made, such as the doping of semiconductor materials with metals or non-metals, the deposition of noble metals on the surface of semiconductor materials, the use of supportive materials, the surface modification of photocatalysts via different synthesis techniques, and the formation of heterojunctions. The utilization of these strategies can provide a feasible means for fabricating visible-light-responsive photocatalysts with enhanced performance [12][13][14][15].…”

Current Trends in MOF (Metal-Organic Framework) and Metal X-ides

“…Li et al [ 10 ] synthesized a Zn 3 In 2 S 6 /g-C 3 N 4 photocatalyst by using a low-temperature solvothermal method, showing excellent degradation performance regarding tetracycline (TC) under visible light irradiation. The degradation mechanism of photocatalysts on TC was analyzed, demonstrating excellent performance at low temperatures.…”