Effects of organic acids and initial solution pH on photocatalytic degradation of bisphenol A (BPA) in a photo-Fenton-like process using goethite (α-FeOOH)

2016 ◽  
Vol 15 (8) ◽  
pp. 1046-1053 ◽  
Author(s):  
Guangshan Zhang ◽  
Qiao Wang ◽  
Wen Zhang ◽  
Tian Li ◽  
Yixing Yuan ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Bisphenol A ◽  
Organic Acids ◽  
Photocatalytic Degradation ◽  
Initial Solution ◽  
Solution Ph ◽  
System P

Proposed reaction mechanism of BPA photodegradation in an α-FeOOH-oxalate synergistic system.

scholarly journals Enhanced photocatalytic degradation performance of bisphenol A over TiO2-SiO2 photocatalyst by improving specific surface area under simulation natural light

2020 ◽  
Vol 9 (4) ◽  
pp. 49-57
Author(s):  
Minh-Vien Le ◽  
Tai Huynh Huu ◽  
Oanh Nguyen Thi Kieu ◽  
Thang Ngo Manh ◽  
Suong Ho Thi Ngoc
Keyword(s):  
Bisphenol A ◽  
Specific Surface ◽  
Photocatalytic Degradation ◽  
Surface Area ◽  
Specific Surface Area ◽  
Organic Pollutant ◽  
Molar Ratio ◽  
Natural Light ◽  
Solution Ph ◽  
Initial Concentration

The application of natural light in photocatalytic process is a potential energy source. In this study, TiO2-SiO2 nanoparticles with outstandingly enhanced photocatalytic activity have been fabricated by sol-gel method. The prepared photocatalysts with different molar ratio of TiO2:SiO2 as 100:0; 95:5; 85:15 and 75:25 were denoted as TiO2, TS5, TS15 and TS25, respectively. Characterization of these photocatalysts was evaluated using transmission electron microscopy (TEM), X-ray diffraction (XRD), N2 Adsorption and Desorption isotherms method (Brunauer–Emmet–Teller, BET). The specific surface area was improved in TiO2-SiO2 photocatalyst namely 193.9 m2.g-1 (at molar ratio of TiO2:SiO2 of 95:5) compared to 33.6 m2.g-1 of TiO2. The crystallite size was calculated around 5 nm from XRD data and uniform particle size distribution was observed in TEM image. The photocatalytic experiments were performed with bisphenol A (BPA) as model compound of organic pollutant. The effect of various operation parameters such as initial concentration, initial solution pH and photocatalyst dosage has been investigated. The kinetic studies of the photocatalytic degradation BPA over TS5 followed the pseudo-first order (k=1.09×10-2 min-1) and degradation yield to be 82.4% BPA, at pH6.23, initial concentration to be 10 ppm and photocatalyst dosage to be 1.0 g.L-1. The photocatalyst TS5 maintained activity after four cycles and remained 78%. The TiO2-SiO2 composite photocatalyst has shown to be a promising heterogeneous photocatalyst for organic degradation.

scholarly journals Photocatalytic degradation of bisphenol A induced by dense nanocavities inside aligned 2D-TiO2 nanostructures

2019 ◽  
Vol 328 ◽  
pp. 189-201 ◽  
Author(s):  
Snejana Bakardjieva ◽  
Radek Fajgar ◽  
Ivo Jakubec ◽  
Eva Koci ◽  
Alexander Zhigunov ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Photocatalytic Degradation ◽  
Tio2 Nanostructures

scholarly journals Facile Synthesis of Porous ZnO Nanoparticles Efficient for Photocatalytic Degradation of Biomass-Derived Bisphenol A Under Simulated Sunlight Irradiation

2021 ◽  
Vol 8 ◽  
Author(s):  
Yujie Wang ◽  
Kang Hu ◽  
Zhiyu Yang ◽  
Chenlu Ye ◽  
Xin Li ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Photocatalytic Degradation ◽  
Inorganic Ions ◽  
Endocrine Disrupting Compounds ◽  
Degradation Process ◽  
Sunlight Irradiation ◽  
Calcination Temperatures ◽  
Endocrine Disrupting Compound ◽  
Endocrine Disrupting ◽  
Photocatalytic Removal

Bisphenol A (BPA) produced from biomass is a typical endocrine disrupting compound that is carcinogenic and genotoxic and can be accumulated in water due to its extensive use and difficult degradation. In this study, the porous ZnO photocatalyst with core-shell structure and large surface area was successfully developed for the efficient photocatalytic degradation of BPA. The various effects of calcination temperatures, BPA concentrations, ZnO dosages, pH and inorganic ions on the degradation performance were systemically studied. The results showed that 99% degradation of BPA was achieved in 1 h using the porous ZnO calcined at 550°C under the conditions of 30 mg/L BPA, 1 g/L ZnO, and pH of 6.5. Besides, the inhibition effects of anions for the photocatalytic removal of BPA decreased in the order of H2PO4- > HCO3- > SO42- > Cl−, while the cations K+, Ca2+, and Na+ had little effect on the photocatalytic degradation of BPA. The results of scavenging experiments showed that h+, ·O2-, and e− played the key role in the photocatalytic degradation process. Finally, the main pathways of BPA degradation were proposed based on ten intermediates found in the degradation process. This work may provide a good guideline to degrade various endocrine disrupting compounds in wastewater treatment.

Efficient photocatalytic degradation of bisphenol A and dye pollutants over BiOI/Zn2SnO4 heterojunction photocatalyst

RSC Advances ◽  
2015 ◽  
Vol 5 (14) ◽  
pp. 10688-10696 ◽  
Author(s):  
Tao Yan ◽  
Hongye Liu ◽  
Meng Sun ◽  
Xiaodong Wang ◽  
Mengmeng Li ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Bisphenol A ◽  
Photocatalytic Degradation ◽  
Dye Pollutants

The formation of a heterojunction between BiOI and Zn2SnO4 greatly enhanced the photocatalytic activity of BiOI/Zn2SnO4 composites.

Enhanced red upconversion emission and its mechanism in Yb3+–Er3+ codoped α-NaLuF4 nanoparticles

2017 ◽  
Vol 41 (3) ◽  
pp. 1193-1201 ◽  
Author(s):  
Hao Lin ◽  
Dekang Xu ◽  
Anming Li ◽  
Zhiren Qiu ◽  
Shenghong Yang ◽  
...  
Keyword(s):  
Upconversion Luminescence ◽  
Upconversion Emission ◽  
Initial Solution ◽  
Solution Ph

Red upconversion luminescence is greatly enhanced through manipulation of the initial solution pH.

Sign in / Sign up

Export Citation Format

Share Document