Ag Nanoparticles Deposited onto BaTiO3 Aerogel for Highly Efficient Photodegradation

Author:

Wu Jun12,Yan Wen1,Xie Mengyuan3,Zhong Kai4,Cui Sheng12,Shen Xiaodong12

Affiliation:

1. College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China

2. Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211816, China

3. CTC Nanjing Guocai Testing Limited Corporation, Nanjing 210046, China

4. The 55th Research Institute of China Electronics Technology Group Corporation, Nanjing 211111, China

Abstract

Given the increasingly severe environmental problems caused by water pollution, the degradation of organic dyes can be effectively achieved through the utilization of photocatalysis. In this work, metal alkoxides and a combination of alcohol/hydrophobic solvents are employed to prepare BaTiO3 aerogels via a liquid-phase and template-free synthetic route. The preparation process of the aerogels solely entails facile agitation and supercritical drying, eliminating the need for additional heat treatment. The binary solvent of ethanol and toluene is identified as the optimal choice, resulting in a significantly enhanced surface area (up to 223 m2/g) and an abundant pore structure of BaTiO3 aerogels compared to that of the BaTiO3 nanoparticles. Thus, the removal efficiency of the BaTiO3 aerogel sample for MO is nearly twice as high as that of the BaTiO3 nanoparticles sample. Noble metal Ag nanoparticles’ deposition onto the BaTiO3 aerogel surface is further achieved via the photochemical deposition method, which enhances the capture of photogenerated electrons, thereby ensuring an elevated level of photocatalytic efficiency. As a result, Ag nanoparticles deposited on BaTiO3 aerogel can degrade MO completely after 40 min of illumination, while the corresponding aerogel before modification can only remove 80% of MO after 60 min. The present work not only complements the preparatory investigation of intricate aerogels but also offers a fresh perspective for the development of diverse perovskite aerogels with broad applications.

Funder

National Natural Science Foundation of China

Natural Science Foundation of Jiangsu Province

Key Laboratory of Advanced Functional Composites Technology, China

Publisher

MDPI AG

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