scholarly journals Photoinduced Synthesis of Hierarchical Flower-Like Ag/Bi2WO6 Microspheres as an Efficient Visible Light Photocatalyst

2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Shuisheng Wu ◽  
Nianyuan Tan ◽  
Donghui Lan ◽  
Bing Yi
Keyword(s):  
Visible Light ◽  
Reaction Rate ◽  
Diffuse Reflectance ◽  
Three Dimensional ◽  
Photocatalytic Reaction ◽  
Visible Light Photocatalyst ◽  
Reaction Rate Constants ◽  
Light Region ◽  
Photocatalytic Activities ◽  
Uv Visible

A series of three-dimensional microflower-like Ag/Bi2WO6 composites were synthesized through a simple and practical photoreduction process with different photoreduction times. The UV-visible diffuse reflectance spectra indicate that the spectrum of Ag/Bi2WO6 is significantly red-shifted compared to pure Bi2WO6 microspheres in the visible light region. The photocatalytic activities of the as-prepared samples were evaluated by the decolorization of rhodamine B under visible light irradiation. The photocatalytic reaction rate constants of the Ag/Bi2WO6 with a photoreduction time of 20 min was 3.60 times bigger than those of pure Bi2WO6. The enhanced photocatalytic activity could be attributed to the synergistic effect of increased light absorption range and the effective separation of photogenerated carriers caused by Ag nanoparticles.

Developing an Iron-Carbon Nitride Complex as Photocatalyst with Response to Visible Light

2011 ◽  
Vol 287-290 ◽  
pp. 679-682
Author(s):  
Jun Cheng Yang ◽  
Yong Guo ◽  
Lei Lei Luo ◽  
Fei Kong ◽  
Sheng Chu ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Visible Light ◽  
Carbon Nitride ◽  
Diffuse Reflectance ◽  
Light Response ◽  
Iron Chloride ◽  
Visible Light Region ◽  
Visible Light Response ◽  
Light Region ◽  
Uv Visible

In this article, we synthesized a porphyran-like complex composed of iron chloride and carbon nitride polymer (CNP) as a new photocatalyst with visible light response. Several chemical reactions were carried out to confirm it to be a complex, while FTIR, XRD, XRF were used to further prove its structure. According to the UV-Visible diffuse reflectance spectra, the absorption had been extended to visible light region. Photodegradation of methyl orange (MO) on this novel Fe-CNP complex confirmed it possesses high activity under visible light irradiation.

scholarly journals Ag/Tio2/AOF as an Easily Reused and Highly Active Catalyst for Dye Photo-Degradation

2016 ◽  
Vol 11 (1) ◽  
pp. 155892501601100
Author(s):  
Tingxian Tao ◽  
Jiabin Xu ◽  
Hui Song ◽  
Rongmei Liu ◽  
Zhichuan Wu
Keyword(s):  
Visible Light ◽  
Diffuse Reflectance ◽  
Active Catalyst ◽  
Fiber Surface ◽  
Reduction Process ◽  
Photo Degradation ◽  
X Ray ◽  
Highly Active ◽  
Light Region ◽  
Photocatalytic Activities

A novel TiO2 loaded with Ag photocatalyst covering on a modified fiber surface was prepared by coordination-hydrolysis combined with a photo-reduction process. Samples were characterized by X-ray powder diffraction (XRD), field emission scanning electron microscope (SEM), X-ray photoelectron spectroscope (XPS) and ultraviolet visible diffuse reflectance spectra (UV-vis DRS). Compared with powder TiO2, the TiO2/amidoxime fiber (TiO2/AOF) and Ag/TiO2/amidoxime fiber (Ag/TiO2/AOF) exhibited a significant absorption edge of red-shift from ultraviolet to visible light region. The samples’ visible-light photodegradation activities were investigated and the results showed that the Ag/TiO2/AOFs exhibit excellent photocatalytic activities-about 99% decomposition rate of Rhodamine B with 100 minutes of visible light irradiation. The catalyst exhibits excellent catalytic activity and is easily recovered and reused.

scholarly journals Synthesis and Photocatalytic Properties of One-Dimensional Composite - Nanowires

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Qianqian Zhang ◽  
Baibiao Huang ◽  
Peng Wang ◽  
Xiaoyang Zhang ◽  
Xiaoyan Qin ◽  
...  
Keyword(s):  
Visible Light ◽  
Diffuse Reflectance ◽  
Ph Value ◽  
One Dimensional ◽  
X Ray ◽  
Starting Solution ◽  
Transmission Electron ◽  
Photocatalytic Activities ◽  
Value Range ◽  
Uv Visible

One-dimensional composite - nanowires were successfully fabricated by a simple microwave-assistant hydrothermal method. The successful fabrication of one-dimensional - nanowires can only be realized at pH value range of 1–5 of the starting solution. The fabricated nanowires were characterized by X-ray powder diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), UV-visible diffuse reflectance spectra (UV-Vis DRS), and photoluminescence (PL), respectively. The diameter of the nanowires varies from 30 to 100 nm; the length is a few micrometers. Methylene blue (MB) solutions were used to evaluate the visible light photocatalytic activities of the fabricated samples. Compared with , the fabricated - nanowires show enhanced efficiency in oxidization of MB under visible light.

scholarly journals Synthesis and characterization of Z-scheme heterostructure CoWO4/g-C3N4 as a visible-light photocatalyst for removal of organic pollutant

2021 ◽  
Vol 10 (2) ◽  
pp. 59-63
Author(s):  
Hai Pham Viet ◽  
Anh Dao Thi Ngoc ◽  
Viet Nguyen Minh ◽  
Ha Tran Thi Viet ◽  
Dang Do Van ◽  
...  
Keyword(s):  
Visible Light ◽  
Rhodamine B ◽  
High Performance ◽  
Organic Pollutant ◽  
Photogenerated Electron ◽  
Morphological Properties ◽  
Electron Hole ◽  
Visible Light Photocatalyst ◽  
Photocatalytic Activities

In this study, direct Z–scheme heterostructure CoWO4/g-C3N4 was synthesized by a facile hydrothermal method. The structural, morphological properties of the prepared samples were characterised by XRD, SEM, UV–Vis and PL measurements. The as-obtained heterostructure CoWO4/g-C3N4 exhibited enhanced photocatalytic activities toward the degradation of Rhodamine B under visible light irradiation with 92% Rhodamine B removal after 80 minutes irritation, which exceeded pristine g-C3N4 and CoWO4. The enhanced photocatalytic performance ascribed to interfacial contact between g-C3N4 and CoWO4, thus further inhibiting the recombination of photogenerated electron/hole pairs. It is anticipated that the construction of Z–scheme heterostructure CoWO4/g-C3N4 is an effective strategy to develop high-performance photocatalysts for the degradation of organic pollutants in water.

scholarly journals Preparation and Characterizations of In0.1SnxZn0.85-2xS Powder Photocatalysts for Hydrogen Production under Visible Light Irradiation

2011 ◽  
Vol 364 ◽  
pp. 238-242 ◽  
Author(s):  
Kimi Melody ◽  
Yuliati Leny ◽  
Mustaffa Shamsuddin
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Solid Solutions ◽  
Visible Light Irradiation ◽  
Diffuse Reflectance ◽  
Average Rate ◽  
Light Irradiation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Uv Visible

A series of In0.1SnxZn0.85-2xS solid solutions was synthesized by hydrothermal method and employed as photocatalyst for photocatalytic hydrogen evolution under visible light irradiation. The structures, optical properties and morphologies of the solid solutions were studied by X-ray diffraction, diffuse reflectance UV–visible spectroscopy and field emission scanning electron microscopy. From the characterizations, it was confirmed that In0.1SnxZn0.85-2xS solid solution can be obtained and they have nanosized particles. The highest photocatalytic activity was observed on In0.1Sn0.03Zn0.79S photocatalyst, with average rate of hydrogen production 3.05 mmol/h, which was 1.2 times higher than the In0.1Zn0.85S photocatalyst.

Facile hydrothermal synthesis and improved photocatalytic activities of Zn2+ doped Bi2MoO6 nanosheets

RSC Advances ◽  
2016 ◽  
Vol 6 (38) ◽  
pp. 32349-32357 ◽  
Author(s):  
Xiang-Biao Zhang ◽  
Lei Zhang ◽  
Jin-Song Hu ◽  
Xin-Hua Huang
Keyword(s):  
Hydrothermal Synthesis ◽  
Visible Light ◽  
Photocatalytic Ability ◽  
Synthesis Strategy ◽  
Photocatalytic Activities ◽  
Uv Visible

A novel sheet-like Zn2+ doped Bi2MoO6 photocatalyst with excellent UV-visible-light induced photocatalytic ability was successfully fabricated through a facile hydrothermal synthesis strategy.

scholarly journals Preparation of Fe-DopedTiO2Nanotubes and Their Photocatalytic Activities under Visible Light

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Honghui Teng ◽  
Shukun Xu ◽  
Dandan Sun ◽  
Ying Zhang
Keyword(s):  
Visible Light ◽  
Visible Region ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
Visible Absorption ◽  
X Ray ◽  
Transmission Electron ◽  
Photocatalytic Activities ◽  
Ultrasonic Assisted ◽  
Uv Visible

Fe-doped TiO2nanotubes (Fe-TNTs) have been prepared by ultrasonic-assisted hydrothermal method. The structure and composition of the as-prepared TiO2nanotubes were characterized by transmission electron microscopy, X-ray diffraction, and UV-Visible absorption spectroscopy. Their photocatalytic activities were evaluated by the degradation of MO under visible light. The UV-visible absorption spectra of the Fe-TNT showed a red shift and an enhancement of the absorption in the visible region compared to the pure TNT. The Fe-TNTs were provided with good photocatalytic activities and photostability and under visible light irradiation, and the optimum molar ratio of Ti : Fe was found to be 100 : 1 in our experiments.

Single step hydrothermal synthesis of beyerite, CaBi2O2(CO3)2 for the fabrication of UV-visible light photocatalyst BiOI/CaBi2O2(CO3)2

RSC Advances ◽  
2016 ◽  
Vol 6 (44) ◽  
pp. 38252-38262 ◽  
Author(s):  
Vidhu Malik ◽  
Meenakshi Pokhriyal ◽  
S. Uma
Keyword(s):  
Hydrothermal Synthesis ◽  
Visible Light ◽  
Single Step ◽  
Rectangular Plates ◽  
Composite Photocatalyst ◽  
Visible Light Photocatalyst ◽  
Uv Visible

Uniform rectangular plates of the mineral, beyerite (CaBi2O2(CO3)2) belonging to the “sillen” family have been successfully synthesized and is used in fabricating the composite photocatalyst BiOI/CaBi2O2(CO3)2.

Preparation of In2S3@TiO2 Nanobelt Heterostructures with High UV-Visible Light Photocatalytic Activities

2015 ◽  
Vol 7 (3) ◽  
pp. 479-488 ◽  
Author(s):  
Xiaowei Wang ◽  
Wenxia Liu ◽  
Xingqi Wang ◽  
Dehai Yu ◽  
Hong Liu
Keyword(s):  
Visible Light ◽  
Photocatalytic Activities ◽  
Uv Visible ◽  
Visible Light Photocatalytic
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