Nitrogen doped BiFeO3 with enhanced magnetic properties and photo-Fenton catalytic activity for degradation of bisphenol A under visible light

In order to improve the visible light response and reaction efficiency of nitrogen-doped TiO2 set urea as nitrogen source, and silica gel as the load reagent adopt sol-gel method to prepare powder of nitrogen-doped TiO2 supported on SiO2 , use equal volume impregnation method to load MnO2 on catalyst, and then obtain the composite photocatalyst after drying, and roasting .The prepared composite catalysts were characterized by XPS, TEM, SEM, XRD and other methods. Moreover, the photo-catalytic activity of the composite catalysts under visible-light region was tested, and the influences of nitrogen content and calcinations temperature on the photo-catalytic activity were investigated. The results show that:(1) the range of light response of modified composite catalyst was expanded from ultraviolet region to visible-light region, which results in high visible-light catalytic activity in the degradation of methyl orange.(2) Through the mechanism of photo-catalytic reaction and the treatment effect analysis, MnO2 as catalytic resulting O2 can be served as a good electronic capture agent and improve the reaction efficiency.(3)With the reduction of nitrogen content,and the increase of calcination temperature, the visible-light catalytic activity was weakened.(4) The activity of catalyst was reused six times, without significant reduction and had excellent efficiency and stability.

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Femtomolar sensitivity of bisphenol A photoelectrochemical aptasensor induced by visible light-driven TiO2 nanoparticle-decorated nitrogen-doped graphene

Journal of Materials Chemistry B ◽

10.1039/c6tb01414c ◽

2016 ◽

Vol 4 (37) ◽

pp. 6249-6257 ◽

Cited By ~ 16

Author(s):

Lei Zhou ◽

Ding Jiang ◽

Xiaojiao Du ◽

Danyang Chen ◽

Jing Qian ◽

...

Keyword(s):

Charge Transfer ◽

Bisphenol A ◽

Visible Light ◽

Charge Recombination ◽

Tio2 Nanoparticle ◽

Nitrogen Doped ◽

Efficient Charge ◽

Visible Light Driven ◽

Nitrogen Doped Graphene ◽

Doped Graphene

Efficient charge transfer takes place by coupling nitrogen doped graphene with TiO2 and the charge recombination of the composites is significantly suppressed, resulting enhanced photocurrent responses than pristine TiO2.

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Synthesis of FePcS–PMA–LDH Cointercalation Composite with Enhanced Visible Light Photo-Fenton Catalytic Activity for BPA Degradation at Circumneutral pH

Materials ◽

10.3390/ma13081951 ◽

2020 ◽

Vol 13 (8) ◽

pp. 1951 ◽

Cited By ~ 1

Author(s):

Fenglian Huang ◽

Shiqiang Tian ◽

Yan Qi ◽

Erping Li ◽

Liangliang Zhou ◽

...

Keyword(s):

Catalytic Activity ◽

Bisphenol A ◽

Visible Light ◽

Layered Double Hydroxides ◽

Electrochemical Impedance ◽

Reaction System ◽

High Catalytic Activity ◽

Exchange Method ◽

Double Hydroxides ◽

Circumneutral Ph

(1) Background: Iron tetrasulfophthalocyanine with a large nonlinear optical coefficient, good stability, and high catalytic activity has aroused the attention of researchers in the field of photo-Fenton reaction. Further improvement of the visible light photo-Fenton catalytic activity under circumneutral pH conditions for their practical application is still of great importance. (2) Methods: In this paper, iron tetrasulfophthalocyanine (FePcS) and phosphomolybdic acid (PMA) cointercalated layered double hydroxides (LDH) were synthesized by the ion-exchange method. All samples were fully characterized by various techniques and the results showed that FePcS and PMA were successfully intercalated in layered double hydroxides and the resulted compound exhibited strong absorption in the visible light region. The cointercalation compound was tested as a heterogeneous catalyst for the visible light photo-Fenton degradation of bisphenol A (BPA) at circumneutral pH. (3) Results: The results showed that the degradation and total organic carbon removal efficiencies of bisphenol A were 100% and 69.2%, respectively. (4) Conclusions: The cyclic voltammetry and electrochemical impedance spectroscopy measurements demonstrated that the main contribution of PMA to the enhanced photo-Fenton activity of FePcS–PMA–LDH comes from the acceleration of electron transfer in the reaction system. Additionally, the possible reaction mechanism in the photo-Fenton system catalyzed by FePcS–PMA–LDH was also proposed.

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