多孔陶瓷负载Ce-TiO2光催化降解印染废水研究

摘要/Abstract

摘要： 本文以建筑废弃物为主要原料,氧化铝为铝源,氟化铝为晶须催化剂,氧化硼、氧化铈、三氧化钼为烧结助剂,玉米淀粉为造孔剂,采用干压成型法制备了莫来石多孔陶瓷,研究了氧化铈和三氧化钼掺量对莫来石多孔陶瓷结构及理化性能的影响,并以性能最佳的陶瓷负载TiO₂/Ce-TiO₂进行光催化降解模拟印染废水研究。结果表明:以质量分数计,当氧化铈掺量为4%、三氧化钼掺量为1%时,多孔陶瓷的抗折强度为8.69 MPa,开口孔隙率为64.25%;负载0.05 g Ce-TiO₂催化剂,掺入1.2 mmol/L的PMS,在功率为18 W、波长为420~430 nm的LED可见光灯照射120 min后,其对亚甲基蓝溶液降解率达到96.62%。

关键词: 多孔陶瓷, 莫来石晶须, 可见光催化, 降解, 异质结, 印染废水

Abstract: In this paper, mullite porous ceramics were prepared by dry compression molding method using construction waste as main raw material, alumina as aluminum source, aluminum fluoride as whisker catalyst, boron oxide, cerium oxide and molybdenum trioxide as sintering aids, and corn starch as pore forming additive. The effects of cerium oxide and molybdenum trioxide contents on the structure and physicochemical properties of the mullite porous ceramics were investigated, and the ceramics with the best performance were loaded with TiO₂/Ce-TiO₂ for photocatalytic degradation of simulated printing and dyeing wastewater. The results show that, in terms of mass fraction, when the content of cerium oxide is 4% and the content of molybdenum trioxide is 1%, the flexural strength of porous ceramics is 8.69 MPa, and the open porosity is 64.25%. Loading with 0.05 g Ce-TiO₂ and mixing with 1.2 mmol/L PMS, the degradation rate of the methylene blue solution reaches 96.62% after 120 min of irradiation with LED visible light at power of 18 W and wavelength of 420~430 nm.

Key words: porous ceramics, mullite whisker, visible photocatalytic, degradation, heterojunction, dying wastewater

中图分类号:

陈伟杰, 花开慧, 雷鸣, 王望龙. 多孔陶瓷负载Ce-TiO₂光催化降解印染废水研究[J]. 人工晶体学报, 2024, 53(1): 170-180.

CHEN Weijie, HUA Kaihui, LEI Ming, WANG Wanglong. Photocatalytic Degradation of Dying Wastewater by Porous Ceramics Supported Ce-TiO₂[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2024, 53(1): 170-180.

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多孔陶瓷负载Ce-TiO₂光催化降解印染废水研究

Photocatalytic Degradation of Dying Wastewater by Porous Ceramics Supported Ce-TiO₂

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