scholarly journals AgBr/BiOBr Nano-Heterostructure-Decorated Polyacrylonitrile Nanofibers: A Recyclable High-Performance Photocatalyst for Dye Degradation under Visible-Light Irradiation

Polymers ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1718 ◽  
Author(s):  
Zhang ◽  
Qi ◽  
Zhang
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Active Sites ◽  
High Performance ◽  
Dye Degradation ◽  
Exchange Process ◽  
Light Irradiation ◽  
Component Ratio ◽  
Ion Exchange Process

Macrostructural flexible photocatalysts have been proven to have desirable recyclable properties during the photocatalytic degradation of organic pollutants in water. However, the photocatalytic activities of these photocatalysts are often unsatisfactory due to the fast recombination of charge carriers and the limited surface active sites. Herein, we developed a novel flexible photocatalyst of AgBr/BiOBr/polyacrylonitrile (PAN) composite mats (CMs) through the controllable assembly of AgBr/BiOBr nano-heterostructures on electrospun polyacrylonitrile nanofibers (PAN NFs) via a three-step synthesis route. The component ratio of AgBr to BiOBr in the CMs could be easily adjusted by controlling the in situ ion exchange process. The charge–transfer process occurring at the interface of the AgBr/BiOBr nano-heterostructures strongly hindered the recombination of photoinduced electron–hole pairs, thereby effectively enhancing the photocatalytic activity of the AgBr/BiOBr/PAN CMs. Meanwhile, the unique hierarchical inorganic/organic heterostructure of the AgBr/BiOBr/PAN CMs not only led to good flexibility, but also provided an abundance of active sites for photocatalytic reactions. Upon visible-light irradiation, AgBr/BiOBr/PAN CMs with an optimal ratio of AgBr to BiOBr components exhibited both enhanced photocatalytic activity and excellent separability during the degradation of methyl orange in water compared to the BiOBr/PAN CMs.

Photocatalytic Degradation of Methylene Blue over Co-Ag3VO4 under Visible Light Irradiation

2011 ◽  
Vol 335-336 ◽  
pp. 1385-1390 ◽  
Author(s):  
Shuo Wiei Zhao ◽  
Hui Xu ◽  
Hua Ming Li ◽  
Yuan Guo Xu
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Absorption Edge ◽  
Diffuse Reflectance Spectroscopy ◽  
Dye Degradation ◽  
Light Irradiation ◽  
Experimental Conditions ◽  
X Ray

In order to improve the photocatalytic activity, Co was successfully loaded into Ag3VO4 by using impregnation process. The samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDS) and diffuse reflectance spectroscopy (DRS). The XRD and SEM–EDS analyses revealed that Co ion was dispersed on Ag3VO4. The DRS results indicated that the absorption edge of the Co–Ag3VO4 catalyst shifted to longer wavelength. The enhanced photocatalytic activity of Co–Ag3VO4 for Methylene Blue(MB) dye degradation under visible light irradiation was due to its wider absorption edge and higher separation rate of photo-generated electron and holes. In the experimental conditions, it is demonstrated that the MB was effectively degraded by more than 95% within 40 min when the Co–Ag3VO4 catalyst was calcined at 300°C with 1 wt.% Co content.

scholarly journals Mesoporous Cu–Cu2O@TiO2 heterojunction photocatalysts derived from metal–organic frameworks

RSC Advances ◽  
2020 ◽  
Vol 10 (25) ◽  
pp. 14550-14555 ◽  
Author(s):  
Wenling Zhao ◽  
Chengcheng Liu
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Dye Degradation ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
High Photocatalytic Activity ◽  
Light Irradiation ◽  
Metal Organic ◽  
Organic Framework

Cu–Cu2O@TiO2 heterojunction photocatalyst derived from a metal–organic framework shows high photocatalytic activity for dye degradation under visible light irradiation.

The Influence of Soaking Time on Photocatalytic Performance of g-C3N4 under Visible Light Irradiation

2020 ◽  
Vol 862 ◽  
pp. 1-6
Author(s):  
Tanaporn Narkbuakaew ◽  
Pornapa Sujaridworakun
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
High Performance ◽  
Photocatalytic Performance ◽  
Dye Degradation ◽  
Dye Adsorption ◽  
Light Irradiation ◽  
Composition Analysis ◽  
Soaking Time ◽  
The Fourier Transform

In this research, visible-light responsive g-C3N4, photocatalyst was achieved through the simple calcination of urea at 600 °C by using the muffle furnace. The effects of calcination soaking time on preparation of high performance g-C3N4 were studied at 1, 2, 3, and 4 h. The g-C3N4 prepared at various soaking times were characterized by the X-ray diffraction (XRD) for crystallographic information and the Fourier-transform infrared spectroscopy (FTIR) for chemical composition analysis. Further, in the case of morphology and surface area of prepared photocatalysts, the Transmission Electron Microscope (TEM) and Brunauer, Emmett and Teller (BET) were applied. The results demonstrated that g-C3N4 with tri-s-triazine based units could be synthesized by calcination of urea at 600 °C and soaking for 1-4 h, as evidently confirmed by XRD and FTIR. For photocatalytic performance in rhodamine B dye degradation under visible light irradiation of achieved g-C3N4 tended to increase as soaking time increased. Moreover, the dye adsorption ability of prepared photocatalysts was obviously developed upon increase of soaking times. Herein, the highest photocatalytic performance was obtained from sample which was soaked at 4 h.

Preparation and photocatalytic activity of WO3–MWCNT nanocomposite for degradation of naphthalene under visible light irradiation

RSC Advances ◽  
2016 ◽  
Vol 6 (45) ◽  
pp. 39063-39073 ◽  
Author(s):  
Mousa Farhadian ◽  
Parvaneh Sangpour ◽  
Ghader Hosseinzadeh
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
High Performance ◽  
Light Irradiation ◽  
The Novel

Preparation and application of the novel and high performance WO3–MWCNT photocatalyst for photodegradation of naphthalene under visible light irradiation.

scholarly journals High Performance of Photocatalytic Activity of Cerium Doped Silika Mesoporous Operating under Visible light Irradiation

2019 ◽  
Vol 1 (2) ◽  
pp. 128
Author(s):  
Gusliani Eka Putri ◽  
Syukri Arief ◽  
Novesar Jamarun ◽  
Feni Rahayu Gusti ◽  
Adel Fisli
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
High Performance ◽  
Light Irradiation

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