水热法制备的 SnO₂ 纳米粒子的结构、形貌和光催化性能对退火温度的依赖性。

The Dependence of Structure, Morphology, and Photocatalytic Properties of SnO₂ Nanoparticles Prepared via Hydrothermal Method on Annealing Temperature.

机构信息

International Institute for Materials Science, Hanoi University of Science and Technology, No. 1 Dai Co Viet, Hanoi, 100000, Vietnam.

School of Chemical Engineering, Hanoi University of Science and Technology, No. 1 Dai Co Viet, Hanoi, 100000, Vietnam.

出版信息

J Nanosci Nanotechnol. 2021 Apr 1;21(4):2588-2594. doi: 10.1166/jnn.2021.19119.

DOI:10.1166/jnn.2021.19119

PMID:33500080

Abstract

New high-performance photocatalytic materials are required to effectively treat water pollution. The effect of annealing temperature on the photocatalytic activities of tin dioxide (SnO₂) nanoparticles is investigated in this work. SnO₂ nanoparticles are prepared via a hydrothermal method and annealing at various temperatures ranging from as-prepared to 900 °C. The size of SnO₂ nanoparticles increases from 4 nm to 10 nm with an increase in annealing temperature. The photocatalytic properties of these nanoparticles are evaluated through the photocatalytic degradation of methylene blue under sunlight. Photocatalytic activities decrease significantly with an increase in annealing temperature due to an increase in size and a decrease in the surface area of SnO₂ nanoparticles.

摘要

需要新型高性能光催化材料来有效处理水污染。本工作研究了退火温度对二氧化锡（SnO₂）纳米粒子光催化活性的影响。通过水热法制备 SnO₂纳米粒子，并在从制备温度到 900°C 的不同温度下进行退火。随着退火温度的升高，SnO₂纳米粒子的尺寸从 4nm 增加到 10nm。通过在阳光下光催化降解亚甲基蓝来评估这些纳米粒子的光催化性能。由于 SnO₂纳米粒子的尺寸增加和表面积减小，光催化活性随着退火温度的升高而显著降低。