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.

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.

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.

scholarly journals Preparation and photocatalytic activity of multi-walled carbon nanotubes/Mg-doped ZnO nanohybrids

2015 ◽  
Vol 33 (3) ◽  
pp. 460-469 ◽  
Author(s):  
C. S. Chen ◽  
X. D. Xie ◽  
S. Y. Cao ◽  
T. G. Liu ◽  
L. W. Lin ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Precipitation Method ◽  
Multi Walled Carbon Nanotubes ◽  
Doped Zno ◽  
Co Precipitation ◽  
Walled Carbon Nanotubes ◽  
Degradation Of Methyl Orange ◽  
Mg Doped

Abstract Multi-walled carbon nanotubes/Mg-doped ZnO (MWNTs/Zn1-xMgxO) nanohybrids were prepared by co-precipitation method, and their photocatalytic activity for methyl orange (MO) was studied. Experimental results showed that Mg-doped ZnO nanoparticles were successfully deposited on the surface of MWNTs under annealing at 450 °C and 550 °C. The resultant MWNTs/Zn0.9Mg0.1O nanohybrids had better photocatalytic activity for degradation of methyl orange than pure ZnO: the rates of MO photodegradation were 100 % and 30 % for 1 h, respectively. The enhancement in the photocatalytic activity was attributed to the excellent electronic properties of MWNTs and Mg-doping.

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.

Preparation of P(St-co-MAA)/CeO2 composite microspheres via surface carboxyl oxidation followed by in situ chemical deposition of CeO2 and their catalytic application on oxidative degradation of methyl orange

RSC Advances ◽  
2014 ◽  
Vol 4 (55) ◽  
pp. 29042-29049 ◽  
Author(s):  
Guanzhi Cheng ◽  
Xinyi Huang ◽  
Hong Zhang ◽  
Yang Hu ◽  
Chengyou Kan
Keyword(s):  
Methyl Orange ◽  
Oxidative Degradation ◽  
Chemical Deposition ◽  
Catalytic Performance ◽  
Composite Microspheres ◽  
Catalytic Application ◽  
Degradation Of Methyl Orange ◽  
Excellent Catalytic Performance

P(St-co-MAA)/CeO2 composites microspheres were fabricated by a novel and facile approach, exhibiting excellent catalytic performance in oxidative degradation.

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.

Photocatalytic Degradation of Methyl Orange by a New Photoctalyst Multi-Walled Carbon Nanotues (MWCNTs)/TiO2/CdS Nanocomposite

2012 ◽  
Vol 184-185 ◽  
pp. 1084-1089
Author(s):  
Ou Yang Ke ◽  
Xie Shan ◽  
Xiao Ou Ma ◽  
Meng Li ◽  
Qiu Lian Feng
Keyword(s):  
Methyl Orange ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Sol Gel ◽  
Oxidative Degradation ◽  
Pure Tio2 ◽  
First Order Kinetics ◽  
Composite Photocatalysts ◽  
Sol Gel Process ◽  
Light Absorbance

Composite photocatalysts using TiO2 coated by Multi-walled carbon nanotues(MWCNTs) and CdS were prepared by sol-gel process. The purpose of adding MWCNTs and CdS was extending the light absorbance range of pure TiO2 to visible light. Methyl orange (MO) was chosen as an object. The degradation of MO by MWCNTs/TiO2/CdS composite photocatalysts under visible light irradiation was studied. The results showed that the presence of MWCNTs and CdS can enhance the photoefficiency of TiO2 greatly. In addition, The photocatalyst was used for five cycles with photocatalytic degradation efficiency still higher than 96%. The photocatalytic degradation of MO followed a first-order kinetics according to the Langmuir-Hinshelwood model. A possible decomposing mechanism for the photocatalytic oxidative degradation was also discussed. The results of the study showed the potential use of MWCNTs/TiO2/CdS composite in degradation of toxic organic pollutants.

scholarly journals Enhanced Visible-Light Photocatalysis of Nanocomposites of Copper Oxide and Single-Walled Carbon Nanotubes for the Degradation of Methylene Blue

Catalysts ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 297 ◽  
Author(s):  
Kamal Prasad Sapkota ◽  
Insup Lee ◽  
Md. Abu Hanif ◽  
Md. Akherul Islam ◽  
Jeasmin Akter ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Catalytic Performance ◽  
Calcination Time ◽  
Photocatalytic Ability ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Composite Photocatalysts ◽  
Cuo Nanocrystals ◽  
Walled Carbon Nanotubes

We report enhanced catalytic action of a series of copper(II)-oxide-single-walled carbon nanotube (CuO-SWCNT) composite photocatalysts (abbreviated as CuO-SWCNT-0.5, CuO-SWCNT-2, and CuO-SWCNT-5, where 0.5, 2, and 5 represent the calcination time in hours) synthesized via recrystallization followed by calcination. The photocatalytic performance of the fabricated nanocomposites was examined by evaluating the degradation of methylene blue (MB) under irradiation with visible light. All of the as-fabricated nanocomposites were effective photocatalysts for the photodegradation of a MB solution; however, the CuO-SWCNT-5 displayed the best photocatalytic ability among the investigated catalysts, achieving 97.33% degradation of MB in 2 h under visible-light irradiation. The photocatalytic action of the nanocomposites was remarkably higher than that of pristine CuO nanocrystals fabricated using the same route. The recyclability of the photocatalyst was also investigated; the CuO-SWCNT-5 catalyst could be reused for three cycles without substantial degradation of its catalytic performance or morphology.

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.

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