Ti3C2/W18O49 hybrid membrane with visible-light-driven photocatalytic ability for selective dye separation

Author(s):  
Xuesong Zhao ◽  
Yingying You ◽  
Yiyang Ma ◽  
Chenchen Meng ◽  
Zhenghua Zhang
2019 ◽  
Vol 11 (12) ◽  
pp. 1764-1772 ◽  
Author(s):  
Ji-Bin An ◽  
Dai-Peng Hu ◽  
Yan-Lin Li ◽  
Na-Li Chen

The Magnetic photocatalytic cobalt ferrite/graphitic-carbon nitride (CoFe2O4/g-C3N4) composites with enhanced photocatalytic activity were successfully fabricated through a simple calcination method. Scanning electron microscopy, powder X-ray diffraction, and infrared spectroscopy were applied to characterize the samples. The photocatalytic behavior of CoFe2O4/g-C3N4 was assessed by degradation of atrazine in photo Fenton-like system under visible light irradiation. The results showed that CoFe2O4/g-C3N4 with 2.0 gL–1 catalyst loading in the presence of 1 mM peroxymonosulfate (PMS) exhibited the best catalytic performance, and more than 97% of atrazine was destructed in 12 min. This enhancement could be attributed to the synergistic effect between CoFe2O4 and g-C3N4 promoting longer lifetime of separated electron–hole pairs derived from the formation of the heterojunction between CoFe2O4 and g-C3N4. This could enhance the composite-mediated activation of PMS for the visible-light driven degradation of atrazine. Moreover, the quenching tests showed that sulfate radicals were responsible for the atrazine degradation. CoFe2O4/g-C3N4 composites have strong magnetic ability, thus their recovery from water could be readily achieved by applying external magnetic field. This study demonstrates reasonable performance of the PMS/CoFe2O4/g-C3N4 system in water matrix as potentially important candidate for environmental remediation.


RSC Advances ◽  
2015 ◽  
Vol 5 (20) ◽  
pp. 15052-15058 ◽  
Author(s):  
Xueming Dang ◽  
Xiufang Zhang ◽  
Weiqiang Zhang ◽  
Xiaoli Dong ◽  
Guowen Wang ◽  
...  

Enhanced visible-light-driven photocatalytic ability is obtained by fabricating an α-S@C3N4 heterojunction with ultra-thin C3N4 nanosheet as the means of rapid charge transfer.


2020 ◽  
Vol 12 (11) ◽  
pp. 1255-1264
Author(s):  
Nada D. Al-Khthami ◽  
Mohammed Alsawat ◽  
Reda M. Mohamed ◽  
Yousef G. Alghamdi ◽  
Zaki I. Zaki

In order to create a new design for an efficient photocatalyst, you need to decrease the obtained band gap and isolate the charge carriers photogenerated while setting up a new visible light methodology. The latter option could be accomplished via combination of catalyst in the metal oxide form over the surface of semiconductor. Hence, the current work aimed at synthesizing a new nanocomposite material from LaFeO3/g-C3N4 through the use of mesoporous silica as a template processing g-C3N4 higher surface area, which was subsequently decorated with LaFeO3. The LaFeO3 of variable content of 1∼4% was used to decorate our targeted basic material. The structure was confirmed by ordinary techniques, in addition to photocatalytic ability via splitting water reaction. g-C3N4 and LaFeO3 photocatalytic efficiencies were compared to the newly developed LaFeO3/g-C3N4 nanocomposites showing their outstanding activity. The optimum LaFeO3 content was confirmed as 3%, which gave higher photocatalytic efficiency against both g-C3N4 and LaFeO3 (34 and 21 times respectively). To enhance the catalytic system efficiency, a scavenger with a positive hole was added as glycerol. A maximum of five runs of higher efficient reuse was examined as required, as well as stable nanocomposite photocatalyst. The mesoporous structure, high surface area, and capacity of charge separation over the photocatalysis process were all investigated as main conditions which affect photocatalytic activity of LaFeO3/g-C3N4 nanocomposites.


2014 ◽  
Vol 2 (41) ◽  
pp. 17366-17370 ◽  
Author(s):  
Tianyu Huo ◽  
Xiufang Zhang ◽  
Xiaoli Dong ◽  
Xinxin Zhang ◽  
Chun Ma ◽  
...  

A bilayer TiO2 photonic crystal (PC)/porous BiVO4 was constructed by using liquid-phase deposition (LPD) and spin coating method for the enhancement of visible-light-driven photocatalytic ability by the improvement of light absorbance.


Author(s):  
Weiqiang Zhang ◽  
Xiufang Zhang ◽  
Xueming Dang ◽  
Xiaoli Dong ◽  
Hongchao Ma ◽  
...  

AbstractThe graphene oxide (GO) is fabricated by chemical oxidation or chemical oxidation combined with ultrasonic irradiation (COUI) from graphite. Ag


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