Industrial Water Treatment ›› 2023, Vol. 43 ›› Issue (1): 83-88. doi: 10.19965/j.cnki.iwt.2022-0241

• RESEARCH AND EXPERIMENT • Previous Articles     Next Articles

Synergistic degradation of phenol by Ag3PO4 photocatalytic-ozone catalytic oxidation

Weijia AN1,2(),Tao Yang2,Lingyu TIAN2,3,Wenquan CUI2,Yinghua LIANG1,2()   

  1. 1.College of Metallurgical Engineering, North China University of Science and Technology, Tangshan 063210, China
    2.College of Chemical Engineering, North China University of Science and Technology, Tangshan 063210, China
    3.Tangshan Guoxuan Battery Co. , Ltd. , Tangshan 063009, China
  • Received:2022-11-15 Online:2023-01-20 Published:2023-01-16
  • Contact: Yinghua LIANG E-mail:anweijia@ncst.edu.cn;liangyh@ncst.edu.cn

Ag3PO4光催化-臭氧催化氧化协同降解苯酚

安伟佳1,2(),杨涛2,田玲玉2,3,崔文权2,梁英华1,2()   

  1. 1.华北理工大学冶金与能源学院,河北 唐山 063210
    2.华北理工大学化学工程学院,河北 唐山 063210
    3.唐山国轩电池有限公司,河北 唐山 063009
  • 通讯作者: 梁英华 E-mail:anweijia@ncst.edu.cn;liangyh@ncst.edu.cn
  • 作者简介:安伟佳(1989— ),高级实验师。E-mail:anweijia@ncst.edu.cn|梁英华,教授。E-mail:liangyh@ncst.edu.cn
  • 基金资助:
    河北省自然科学基金重点项目(B2020209017);河北省教育厅青年基金(QN2022115)

Abstract:

A photocatalytic-catalytic ozone oxidation synergistic system was constructed with Ag3PO4 as photocatalyst and ozone was introduced,which greatly improved the degradation efficiency of phenol. The phenol(30 mg/L) solution could be completely degraded after 6 minutes and the time was shortened by 3 times compared with the single oxidation technology when the same degradation efficiency was achieved. The improvement of the synergistic degradation performance was due to the electrophilic characteristics of ozone. It not only accelerated the migration of photogenerated charges and improved the photocatalytic degradation activity,but also improved the efficiency of ozone utilization,and catalyzed the decomposition of ozone to generate more hydroxyl radicals(·OH) to synergistically improved the degradation and mineralization performance of phenol. It was further verified that ·OH was the main active species in the synergistic degradation system by quenching experiments. The effects of ozone concentration,catalyst dosage,phenol concentration and acidity and alkalinity on the degradation efficiency were investigated,and the photocatalysis-ozone catalytic oxidation synergistic degradation mechanism was proposed.

Key words: photocatalysis, ozone catalytic oxidation, synergistic degradation, Ag3PO4

摘要:

以Ag3PO4为光催化剂并通入臭氧构建了光催化-催化臭氧氧化协同体系,大幅度提高了对苯酚的降解效率。协同处理6 min后可将30 mg/L的苯酚溶液完全降解,在达到相同降解效率时,与单一氧化技术相比时间缩短了3倍。协同体系降解性能的提升源于臭氧的亲电特性,不仅加速了光生电荷的迁移,提升了光催化降解活性;同时还有效提高了臭氧利用效率,催化分解臭氧能产生更多的羟基自由基(·OH),协同促进了苯酚的降解矿化性能。进一步通过猝灭实验验证了·OH是协同降解体系的主要活性物种,考察了臭氧浓度、催化剂投加量、苯酚浓度和酸碱性对降解效率的影响,探讨了光催化-臭氧催化氧化协同降解苯酚的降解机理。

关键词: 光催化, 臭氧催化氧化, 协同降解, 磷酸银

CLC Number: