A Novel PHEMA-Based Bismuth Oxide Composite with High Photocatalytic Activity

Autor: Yuchen Zhu, Gao Yuhang, Songjun Li, Xinhua Yuan, Liuqi Han, Chengcheng Jiao
Rok vydání: 2020
Předmět:
Zdroj: Journal of Inorganic and Organometallic Polymers and Materials. 30:4739-4752
ISSN: 1574-1451
1574-1443
DOI: 10.1007/s10904-020-01595-6
Popis: The Stober method was used to synthesize silicon sphere carriers with uniform size. The surface of the silicon sphere carrier was treated with 3-aminopropyltrimethoxysilane and 2-bromopropionyl bromide as atom transfer radical polymerization (ATRP) initiator and grafted with polyhydroxyethyl methacrylate (PHEMA) by ATRP. Bismuth nitrate was used as bismuth source to form polymer-metal complex with PHEMA. Sodium borohydride was used to reduce the bismuth ions in the composite material to metallic bismuth, and the metal bismuth on the surface of the composite material was oxidized in air atmosphere at 450 °C to obtain the inorganic–organic bismuth oxide composite. The morphology, elemental composition and photocatalytic degradation efficiency of Rhodamine B by bismuth oxide composite were characterized by various measurements. The TG and TEM results show that the composite material has good thermal stability, and Bi2O3 has very good dispersibility and stability in the prepared Bi2O3 composite. When the pH value is 4 with a catalyst dosage of 1.2 g/L, the degradation efficiency of Rhodamine B can reach 99.3% after 4 h of light irradiation, which is 24.2% higher than that of pure bismuth oxide. After 5 cycles, Bi2O3 composites still have a strong degradation effect with a degradation rate of 90.1% for Rhodamine B dye solution, which illuminates that the prepared Bi2O3 composite has good cyclic degradation performance.
Databáze: OpenAIRE
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