Novel visible light-induced g-C3N4 quantum dot/BiPO4 nanocrystal composite photocatalysts for efficient degradation of methyl orange

RSC Advances ◽  
2014 ◽  
Vol 4 (66) ◽  
pp. 35144-35148 ◽  
Author(s):  
Zesheng Li ◽  
Bolin Li ◽  
Shaohong Peng ◽  
Dehao Li ◽  
Siyuan Yang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Quantum Dot ◽  
Visible Light ◽  
Composite Photocatalysts ◽  
Degradation Of Methyl Orange

Novel g-C3N4 quantum dot/BiPO4 nanocrystal heterostructured photocatalysts have been synthesized; the photocatalytic activity for degradation of methyl orange as been significantly improved under visible light (λ > 420 nm) irradiation.

Synthesis of Novel g-C3N4/Bi2WO6 Composite with High Visible Light Photocatalytic Activity

2012 ◽  
Vol 557-559 ◽  
pp. 957-960 ◽  
Author(s):  
Lei Ge ◽  
Chang Cun Han ◽  
Jing Liu
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Doping Amount ◽  
Visible Light Photocatalytic Activity ◽  
Composite Photocatalysts ◽  
Degradation Of Methyl Orange ◽  
Visible Light Photocatalytic ◽  
Composite Samples ◽  
Efficient Transfer

The synthesis of g-C3N4/Bi2WO6composite materials with varying the g-C3N4content was reported in this investigation. The composite samples were characterized by various techniques. The photocatalytic activity of the g-C3N4/Bi2WO6products has been investigated by the degradation of methyl orange dye under visible light irradiation. The UV-vis absorption spectra show that the absorption edge of the composite sample shifts to longer wavelengths with increasing the doping amount of g-C3N4. It is revealed that the g-C3N4/Bi2WO6composite photocatalysts exhibit remarkably enhanced photocatalytic performance for the degradation of methyl orange. The high visible light photocatalytic activity of g-C3N4/Bi2WO6can be attributed to the efficient transfer and separation of charge carriers in the interface between g-C3N4and Bi2WO6particles.

Enhanced catalytic performance of β-FeOOH by coupling with single-walled carbon nanotubes in a visible-light-Fenton-like process

2018 ◽  
Vol 25 (1) ◽  
pp. 9-15 ◽  
Author(s):  
Di Fang ◽  
Yaqun Yu ◽  
Zhihui Xu ◽  
Jiangru Liang ◽  
Lixiang Zhou
Keyword(s):  
Carbon Nanotubes ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Catalytic Mechanism ◽  
Oxidative Degradation ◽  
Catalytic Performance ◽  
Composite Photocatalysts ◽  
Walled Carbon Nanotubes ◽  
Degradation Of Methyl Orange

AbstractCarbon nanotubes/akaganeite composite photocatalysts (CNTs/β-FeOOH) with different weight addition ratios of CNTs have been synthesized by a very simple hydrothermal method. X-ray diffraction, Fourier transform infrared spectrum, UV-vis diffuse reflectance spectra, scanning electron microscopy, and transmission electron microscope were used to characterize the composite photocatalysts. This study investigates the oxidative degradation of methyl orange, a probe contaminant, by a heterogeneous photo-Fenton-like process over the prepared composite photocatalysts. The CNTs/β-FeOOH composites exhibit remarkably enhanced photocatalytic activity toward the degradation of methyl orange in water under visible light irradiation as compared with bare β-FeOOH. The added CNTs have triple crucial roles in the promotion of photocatalytic activity of β-FeOOH. One is to trap electrons and effectively hinder recombination of the photoexcited carriers. Two is to act as a dispersing support to control the particle size of β-FeOOH in the CNTs/β-FeOOH composites. Three is to enhance the visible light absorption intensity. Finally, the catalytic mechanism of CNTs/β-FeOOH composite is proposed.

Coupling with a narrow-band-gap semiconductor for the enhancement of visible-light photocatalytic activity: preparation of Bi2OxS3−x/Nb6O17 and application to the degradation of methyl orange

2016 ◽  
Vol 45 (35) ◽  
pp. 13944-13950 ◽  
Author(s):  
Gang Yan ◽  
Hongfei Shi ◽  
Huaqiao Tan ◽  
Wanbin Zhu ◽  
Yonghui Wang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Band Gap ◽  
Photocatalytic Performance ◽  
Narrow Band ◽  
Visible Light Photocatalytic Activity ◽  
Degradation Of Methyl Orange ◽  
Visible Light Photocatalytic

A new 2D sheet composite Bi2OxS3−x/Nb6O17 has been prepared, which shows good visible light photocatalytic performance for the degradation of methyl orange.

Enhancing visible-light photocatalytic activity of g-C3N4by doping phosphorus and coupling with CeO2for the degradation of methyl orange under visible light irradiation

RSC Advances ◽  
2015 ◽  
Vol 5 (84) ◽  
pp. 68728-68735 ◽  
Author(s):  
Jin Luo ◽  
Xiaosong Zhou ◽  
Lin Ma ◽  
Xuyao Xu
Keyword(s):  
Photocatalytic Activity ◽  
Charge Transfer ◽  
Methyl Orange ◽  
Synergistic Effect ◽  
Visible Light ◽  
Composite Catalyst ◽  
Photogenerated Electrons ◽  
Efficient Charge ◽  
Degradation Of Methyl Orange ◽  
Visible Light Photocatalytic

The efficient charge transfer at the interface of CeO2/P-C3N4composite catalyst due to the synergistic effect between P-C3N4and CeO2, which leads to an effective photogenerated electrons–hole pairs separation.

Dramatic visible light photocatalytic degradation due to the synergetic effects of TiO2 and PDA nanospheres

RSC Advances ◽  
2016 ◽  
Vol 6 (69) ◽  
pp. 64446-64449 ◽  
Author(s):  
Xiaosong Zhou ◽  
Bei Jin ◽  
Jin Luo ◽  
Xuyao Xu ◽  
Lingling Zhang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Visible Light Photocatalytic Activity ◽  
Synergetic Effects ◽  
Degradation Of Methyl Orange ◽  
Visible Light Photocatalytic

Dramatic visible light photocatalytic activity was obtained for the degradation of methyl orange using TiO2 photocatalysts modified with polydopamine (PDA) nanospheres.

scholarly journals Ce2O3/BiVO4 Embedded in rGO as Photocatalyst for the Degradation of Methyl Orange under Visible Light Irradiation

J ◽  
2021 ◽  
Vol 4 (2) ◽  
pp. 154-168
Author(s):  
Damian C. Onwudiwe ◽  
Boitumelo M. Phadi ◽  
Opeyemi A. Oyewo
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Graphene Oxide ◽  
Methyl Orange ◽  
Visible Light ◽  
Reduced Graphene Oxide ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Reduced Graphene ◽  
Degradation Of Methyl Orange

A p–n heterojunction semiconductor structure composed of Ce3O4 and BiVO4 has been synthesized and then incorporated into reduced graphene oxide (rGO) by the hydrothermal method. The ternary composites were characterized by X-ray diffraction, transmission electron microscopy (TEM), scanning electron microscopy (SEM), electron diffraction spectroscopy (EDS), and UV–vis spectroscopy. The efficiency of the composites as photocatalysts was determined by studying the oxidative degradation of methyl orange in aqueous solution under visible light irradiation. The effect of parameters such as pH, catalyst loading, and concentration of the dye solution was examined in order to determine their influence on the photocatalytic activity of the composites. The composite incorporated into reduced graphene oxide presented the highest percentage (above 90%) in 2 h time, attributed to the effect of the increased surface area. The process of the enhanced photocatalytic activity has been discussed based on the energy band positions of the nanoparticles within the composite.

Preparation of Cu2O/TiO2 Heterostructure with High Visible-Light Photocatalytic Activity

2014 ◽  
Vol 1073-1076 ◽  
pp. 47-51
Author(s):  
Qiu Li Yang ◽  
Yi Wen Fang ◽  
Yi Bing Song ◽  
Sa Sa Jia ◽  
Ya Li Lu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Model Compound ◽  
Experimental Results ◽  
Molar Ratios ◽  
Pure Cu ◽  
Degradation Of Methyl Orange ◽  
Visible Light Photocatalytic

The Cu2O/TiO2heterostructure nanocomposites photocatalysts with different molar ratios of Cu2+/Ti4+were successfully synthesized by a simple hydrothermal procedure. The obtained samples were characterized by XRD, SEM, UV-vis DRS in order to detect the composition, the shape and the property. The photocatalytic activity of Cu2O/TiO2nanocomposites was evaluated by the degradation of methyl orange (MO) as a model compound. The experimental results showed that the prepared Cu2O/TiO2nanocomposites exhibited higher photocatalytic activity for the degradation of MO than the pure Cu2O and the commercial anatase TiO2under visible light irradiation.

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