期刊
DALTON TRANSACTIONS
卷 51, 期 31, 页码 11876-11883出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2dt01248k
关键词
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资金
- Talent-Introduction Program of Anqing Normal University [211006]
- Key Laboratory of Aqueous Environment Protection and Pollution Control of Yangtze River in Anhui of Anhui [ASZY016]
- project for the Cultivation of Outstanding Top Talents in Colleges and Universities in Anhui Province [gxgwfx2019039]
- Key Project of Natural Science Research of Anhui Provincial Education Department [KJ2021A0655]
- Chemistry and Chemical Engineering Guangdong Laboratory [2111016]
Nano-ferroelectric materials, specifically BaTiO3 nanoparticles, were found to exhibit excellent catalytic performance in dye degradation in wastewater through the piezo-Fenton synergistic effect. The degradation efficiency and reaction rate were enhanced by increasing the molecular weight of the organic dyes. These results suggest that the piezo-Fenton synergistic effect could provide a new direction for the development of wastewater treatment under mechanical vibration.
Nano-ferroelectric materials have excellent piezoelectric performance and can degrade organic dye by ultrasonic vibration in an aqueous solution. Here, BaTiO3 (BT) nanoparticles were prepared by a sol-gel/hydrothermal method and further applied in dye degradation in wastewater. BT nanoparticles exhibited excellent catalytic performance for organic dye molecule degradation through the piezo-Fenton synergistic effect. It was found that both the degradation efficiency and reaction rate were boosted by the increase of the molecular weight of organic dyes. The degradation efficiency toward different organic dyes exhibited a trend of CR > ABK > TH > RhB > MB > MO. For example, a high piezo-Fenton-catalytic degradation ratio of 82.8% at 5 min and 0.337 min(-1) rate constant were achieved for the CR dye solution (10 mg L-1), which were 3.2 and 6.4 times the corresponding values of piezo-catalytic only degradation. These results mainly originate from the intrinsic properties of BT nanoparticles that can enhance the separation of charge and promote the formation of hydrogen peroxide (H2O2) and hydroxyl radicals (center dot OH) under ultrasonic vibration. Furthermore, the reaction of Fe(II) with H2O2 can further enhance the formation of center dot OH, which can accelerate the degradation of organic dyes. These results indicate that the piezo-Fenton synergistic effect may provide a new clue for the development of the wastewater treatment field under mechanical vibration.
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