Preparation and characterization of polypyrrole/TiO2 nanocomposite and its photocatalytic activity under visible light irradiation

2009 ◽  
Vol 24 (8) ◽  
pp. 2547-2554 ◽  
Author(s):  
Shengying Li ◽  
Mingkai Chen ◽  
Lijun He ◽  
Fei Xu ◽  
Guohu Zhao
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Response ◽  
Light Irradiation ◽  
Force Microscopy ◽  
Atomic Force ◽  
Transmission Electron ◽  
Degussa P25

A simple and convenient method for preparing visible light response photocatalyst polypyrrole/TiO2 (PPy/TiO2) nanocomposite was developed. The products were characterized by x-ray diffraction, transmission electron microscopy, atomic force microscopy, ultraviolet-visible, and Fourier transform infrared techniques. The results indicated that the nanohybrid was composed of anatase TiO2 and PPy and exhibited an enhanced visible light-capturing ability. Average diameters of TiO2 and PPy/TiO2 were 18 and 35 nm, respectively. The photocatalytic activity of the nanocomposite was evaluated by the degradation of methyl orange under visible light irradiation. In the presence of PPy/TiO2 nanocomposite, the degradation efficiency of methyl orange of 95.54% could be obtained under visible light irradiation within 120 min. The apparent rate constant was 2.19 × 10−2, which was better than that Degussa P25 nano-TiO2. The sensitization mechanism of PPy/TiO2 photocatalyst was discussed briefly.

scholarly journals Photocatalytic Degradation of Methylene Blue and Methyl Orange by Y-PTC Metal-Organic Framework

2021 ◽  
Vol 7 (2) ◽  
pp. 129-141
Author(s):  
Adawiah Adawiah ◽  
Muhammad Derry Luthfi Yudhi ◽  
Agustino Zulys
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Metal Organic Framework ◽  
Light Irradiation ◽  
Bandgap Energy ◽  
Metal Organic ◽  
Organic Framework

The yttrium based metal-organic framework (MOF) Y-PTC was synthesized by the solvothermal method using perylene as the linker and yttrium as metal ion. This study aims to assess the photocatalytic activity of yttrium-perylenetetracarboxylate (Y-PTC) metal-organic framework (MOF) toward methylene blue and methyl orange under visible light irradiation. The results of the FTIR analysis showed that Y-PTC MOF had a different structure and composition from its precursor (Na4PTC). The Y-PTC MOF has a bandgap energy value of 2.20 eV with a surface area of 47.7487 m2/g. The SEM-EDS analysis showed an elemental composition of yttrium, carbon, and oxygen, were 6.9%, 72.1% and 20.7%, respectively. Furthermore, Y-PTC MOF was able to adsorb dyes at the optimum by 78.10% and 35.57% toward methylene blue (MB) and methyl orange (MO) at the dispersion period of 60 mins. Y-PTC MOF exhibited photocatalytic activity towards the degradation of methylene blue and methyl orange under visible light irradiation. The addition of H2O2 inhibited Y-PTC photocatalytic activity towards MO degradation from 50.89% to 26.38%. In contrast to MO, the addition of H2O2 had a positive effect on MB, which increased the degradation from 87.56% to 91.65%. Therefore, Y-PTC MOF possessed the potential of a photocatalyst material in dyes degradation under visible light irradiation.

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.

Construction of ZnxCd1−xS/CeO2 composites for enhanced photocatalytic activity and stability by chemical precipitation method

2021 ◽  
pp. 2150334
Author(s):  
Yi-Feng Chai ◽  
Zhong-Hua Zhu ◽  
Ming-Wei Liu ◽  
Jing Zeng ◽  
Gui-Fang Huang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Uv Light ◽  
Chemical Precipitation ◽  
Charge Carriers ◽  
Light Irradiation ◽  
Precipitation Method ◽  
Uv Light Irradiation

Development photoinduced photocatalysts is a significant approach to improve photocatalytic activity and stability. Herein, we successfully prepared Zn[Formula: see text]Cd[Formula: see text]S/CeO2 composites by a facile method. It is found that the Zn[Formula: see text]Cd[Formula: see text]S/CeO2 composites show significant enhancement in photocatalytic activity for methyl orange (MO) degradation under visible and UV light irradiation. The degradation efficiency reaches up to 3.7 times higher than that of pure CeO2 under visible light irradiation. Moreover, the Zn[Formula: see text]Cd[Formula: see text]S/CeO2 samples have almost no loss of photocatalytic activity after five recycles, indicating good photocatalytic stability of the samples. The attractive photocatalytic activity of the Zn[Formula: see text]Cd[Formula: see text]S/CeO2 samples could be attributed to the robust charge carriers transfer and separation.

Facile preparation of semimetallic MoP2 as a novel visible light driven photocatalyst with high photocatalytic activity

2015 ◽  
Vol 3 (19) ◽  
pp. 10360-10367 ◽  
Author(s):  
Tianli Wu ◽  
Shijian Chen ◽  
Dingke Zhang ◽  
Junke Hou
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
High Photocatalytic Activity ◽  
Light Irradiation ◽  
Visible Light Driven ◽  
Facile Preparation

In this work, semimetallic MoP2 nanoparticles are discovered as a new photocatalyst to efficiently degenerate methyl orange and produce H2 from water under visible light irradiation.

Synthesis of AgBr/Bi2WO6 Heterojunction with Enhanced Photocatalytic Activities for Methyl Orange

2014 ◽  
Vol 953-954 ◽  
pp. 1139-1142 ◽  
Author(s):  
Dan Jun Wang ◽  
Xiao Mei He ◽  
Li Guo ◽  
Feng Fu ◽  
Lin Lin Yue
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Deposition Process ◽  
Light Irradiation ◽  
Photocatalytic Activities

AgBr nanoparticle decorated mesoporous Bi2WO6 architectures was fabricated via a facile precipitation-deposition process. As-prepared AgBr/Bi2WO6 heterojunction was characterized by XRD, FE-SEM and HR-TEM. The photocatalytic activities of the samples were evaluated by the photodegradation of methyl orange (MO) under visible light irradiation. The results showed that AgBr nanoparticles decrodation great improved the photocatalytic activity of Bi2WO6. The 2.0at%AgBr/Bi2WO6 sample exhibited the best photocatalytic activity for decolorization of MO.Furthermore, the mechanism of enhanced photocatalytic activity for hierarchical AgBr/Bi2WO6 heterojunction was also discussed.

Facile synthesis of AC@TiO2-S with improved visible light photocatalytic activity and recyclability through a controllable sol–gel approach

RSC Advances ◽  
2015 ◽  
Vol 5 (70) ◽  
pp. 56808-56814 ◽  
Author(s):  
Zhiying Duan ◽  
Zhichao Wang ◽  
Chufeng Sun ◽  
Lianbiao Zhao ◽  
Yanbin Wang
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Sol Gel ◽  
Light Irradiation ◽  
Facile Synthesis ◽  
Visible Light Photocatalytic Activity ◽  
Degradation Of Methyl Orange ◽  
Visible Light Photocatalytic

AC@TiO2-S prepared by controlled sol–gel approach exhibits improved photocatalytic activity over AC@TiO2-G prepared by sol–gel approach for the degradation of methyl orange under visible light irradiation and has excellent recyclability.

The Preparation of NiO/BiVO4 Composite Photocatalyst and its Enhanced Photocatalytic Activities

2015 ◽  
Vol 727-728 ◽  
pp. 42-46
Author(s):  
Pei Pei Yi ◽  
Xiang Zhai ◽  
Xiao Ming Gao ◽  
Feng Fu
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Energy Dispersive Spectrometer ◽  
Bathochromic Shift ◽  
Diffuse Reflectance Spectrum ◽  
Light Irradiation ◽  
Visible Range ◽  
Photocatalytic Activities

The NiO/BiVO4 composite photocatalysts were synthesized by hydrothermal method and were characterized by powder X-ray diffraction(XRD),scanning electron microscope (SEM), UV-vis diffuse reflectance spectrum(UV-vis DRS), Energy Dispersive Spectrometer (EDS), BET techniques. The photocatalytic activities were determined by oxidative decomposition of methyl orange in aqueous solution under visible light irradiation. The results showed that the light absorption of the NiO/BiVO4 became higher in the visible range compared to pure BiVO4, meantime, accompanied by a bathochromic shift of the absorption edge. The photocatalytic activities were evaluated by the photodegradation of Methyl Orange under visible light irradiation. The results showed that NiO loaded evidently improved the photocatalytic activity of BiVO4, and loaded amount had a different impact on the catalytic activity of BiVO4, The 20%NiO/BiVO4 which exhibited the favorable photocatalytic activity in the photodegradation of Methyl Orange.

Visible Light Response of ZrO2 by Nitriding and its Photocatalytic Activity

2007 ◽  
Vol 544-545 ◽  
pp. 163-166
Author(s):  
Takahiro Mishima ◽  
Motohide Matsuda ◽  
Michihiro Miyake
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Uv Irradiation ◽  
Visible Light Irradiation ◽  
Water Oxidation ◽  
Light Response ◽  
Light Irradiation ◽  
Visible Light Response ◽  
H2 Formation

A novel Zr2ON2 catalyst was successfully prepared by nitriding ZrO2, which has a potential enough for H2 formation by the reduction of water under UV irradiation. It was found that the Zr2ON2 had a stable photocatalytic activity for water oxidation and reduction in the presence of sacrificial reagents (methanol or Ag+) under visible light irradiation (λ < 500 nm).

scholarly journals Application of BiVO4 Nanocomposite for Photodegradation of Methyl Orange

Proceedings ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 52 ◽  
Author(s):  
Sarah Aghakhaninejad ◽  
Rahmatollah Rahimi ◽  
Solmaz Zargari
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
X Ray Diffraction ◽  
Pollutant Degradation ◽  
X Ray ◽  
One Step ◽  
Scanning Electron

In this work, BiVO4–graphene photocatalyst was prepared by a facile one-step hydrothermal method and characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The photocatalytic activity of this compound was investigated by destruction of methyl orange (MO) under visible light irradiation. The photodegradation results show that the prepared BVG compound has higher photocatalytic activity than the pure BiVO4 compound. This compound can degrade 98% of MO under visible light irradiation. This work indicates that BiVO4 compounds are excellent compounds for pollutant degradation under visible light irradiation.

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