Visible light-induced hydrogen generation using colloidal (ZnS)0.4(AgInS2)0.6 nanocrystals capped by S2− ions

2015 ◽  
Vol 3 (16) ◽  
pp. 8276-8279 ◽  
Author(s):  
Metikoti Jagadeeswararao ◽  
Sunita Dey ◽  
Angshuman Nag ◽  
C. N. R. Rao
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Hydrogen Generation ◽  
High Photocatalytic Activity ◽  
Co Catalyst ◽  
Visible Light Active

Non-toxic and visible-light active S2−-capped (ZnS)0.4(AgInS2)0.6 nanocrystals exhibit high photocatalytic activity for H2 evolution from water without requiring any co-catalyst.

Hydrothermal Synthesis of Visible Light Active SnO2-SnS2 Nanocomposite Photocatalyst for the Reduction of Cr(VI) in Water

2013 ◽  
Vol 709 ◽  
pp. 7-10
Author(s):  
Jing Li ◽  
Xi Hua Du ◽  
Wei Min Dai ◽  
Yong Cai Zhang
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Sno2 Nanoparticles ◽  
High Photocatalytic Activity ◽  
X Ray ◽  
Transmission Electron ◽  
Visible Light Active ◽  
Composition Structure

A low temperature (130 °C) hydrothermal method was proposed for the synthesis of SnO2-SnS2 nanocomposite. The composition, structure and optical property of the as-synthesized SnO2-SnS2 nanocomposite were characterized by X-ray diffraction, energy dispersive X-ray spectroscopy, transmission electron microscopy, high-resolution transmission electron microscopy and UV-vis diffuse reflectance spectra, and its photocatalytic activity was tested by the reduction of Cr(VI) in water under visible light (λ > 420 nm) irradiation. It was found that the as-synthesized SnO2-SnS2 nanocomposite exhibited high photocatalytic activity in the reduction of Cr(VI) in water under visible light (λ > 420 nm) irradiation, whereas SnO2 nanoparticles displayed no photocatalytic activity in the reduction of Cr(VI) in water under visible light (λ > 420 nm) irradiation.

scholarly journals Innovative and Cost-Efficient BiOI Immobilization Technique on Ceramic Paper—Total Coverage and High Photocatalytic Activity

Nanomaterials ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1959
Author(s):  
Zsolt Kása ◽  
Eszter Orbán ◽  
Zsolt Pap ◽  
Imre Ábrahám ◽  
Klára Magyari ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Low Cost ◽  
Scale Up ◽  
Estimation Method ◽  
Spray Coating ◽  
High Photocatalytic Activity ◽  
Characterization Methods ◽  
Visible Light Active ◽  
Cost Efficient

In the present work, visible light active bismuth oxyiodide (BiOI) was immobilized on a commercial, non-conductive support (an Al2O3 based ceramic paper) using a novel two-step spray coating technique and investigated with different characterization methods (e.g., SEM, Raman, XPS). Our main goal was to eliminate the separation costs after the photocatalytic measurement and investigate the chemical relevance and opportunity to use this technique in the industry. Our as-prepared uniform BiOI layer had similar properties to the well-known reference BiOI powder. The Raman and XPS measurements confirmed that the enriched amount of the surface iodine defined the color and as well the band gap of the BiOI layer. The durable BiOI layers have prominent photocatalytic activity under UV and visible light irradiation as well. The scale-up procedure proved that the designed BiOI coated paper was reusable and potentially applicable in the industry by straightforward scale-up, which is due to the elaborated non-conventional BiOI coverage estimation method. This immobilization technique could open several opportunities for immobilizing many other visible light active photocatalysts with simple materials and low cost.

Ultra-low content of Pt modified CdS nanorods: one-pot synthesis and high photocatalytic activity for H2 production under visible light

2015 ◽  
Vol 3 (47) ◽  
pp. 23732-23742 ◽  
Author(s):  
Li Zhang ◽  
Xianliang Fu ◽  
Sugang Meng ◽  
Xiaoliang Jiang ◽  
Jinghui Wang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Noble Metal ◽  
Solvothermal Method ◽  
H2 Production ◽  
High Photocatalytic Activity ◽  
One Pot ◽  
Co Catalyst ◽  
Cds Nanorods ◽  
Post Deposition

A simple and convenient one-pot solvothermal method was developed for the preparation of platinized CdS nanorods. It is more efficient than the conventional post-deposition methods to enhance the HER activity of CdS. The use of a noble metal co-catalyst can be significantly reduced by the route without unduly sacrificing the activity.

Preparations and Photocatalytic Properties of Visible-Light-Active Nitrogen-Doped TiO2

2012 ◽  
Vol 568 ◽  
pp. 364-367
Author(s):  
Yan Hong Li ◽  
Dong Dong Tan ◽  
De Fu Bi ◽  
Wei Lu ◽  
Shi Hong Xu
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
High Photocatalytic Activity ◽  
Active Nitrogen ◽  
Simple Method ◽  
Nitrogen Doped ◽  
Tin Nanoparticles ◽  
Visible Light Active ◽  
Degradation Of Methyl Orange

A visible-light-active N-TiO2photocatalyst was prepared by a simple method: TiN nanoparticles were calcined in the O2/N2atmosphere. The prepared N-TiO2shows high photocatalytic activity for the degradation of methyl orange in water under visible light irradiation. The photodegradation results indicate that the prepared photocatalysts have the best photocatalytic activity when TiN was calcined at 650 °C for 15 min in the O2/N2atmosphere with 1:15 (volume) of O2/N2.

scholarly journals Infrared response in photocatalytic polymeric carbon nitride for water splitting via an upconversion mechanism

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Zhengyuan Jin ◽  
Xiantao Jiang ◽  
Qitao Zhang ◽  
Shaolong Huang ◽  
Luhong Zhang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Water Splitting ◽  
Carbon Nitride ◽  
Hydrogen Generation ◽  
Matrix Ring ◽  
High Photocatalytic Activity ◽  
Infrared Light ◽  
Hydrogen Energy ◽  
Polymeric Carbon

AbstractBroad-spectrum light activation in photocatalytic materials is considered vital for effective solar-to-hydrogen energy conversion. Here, we propose an upconversion process in oxygen-doped polymeric carbon nitride (C3N4) nanosheets, resulting in high photocatalytic activity for hydrogen generation from water splitting under infrared light irradiation. Due to the upconversion, the photoexcited electrons are transferred to the conduction band, and a σ* carbon-oxygen orbital localized on the triazine matrix ring resulting from oxygen doping extends the lifetime of photogenerated electrons, which increases the photocatalytic activity under both infrared and visible light. Our material exhibits high apparent quantum efficiency of 0.014% and 23% at 850 nm and 420 nm, respectively. Under infrared light (λ ≥ 800 nm, 24 mW cm−2), the hydrogen production rate of our material is 22.84 μmol h−1 g−1, which can reach a yield similar to that of pristine C3N4 under visible light.

scholarly journals Facile Preparation of Efficient WO3Photocatalysts Based on Surface Modification

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Min Liu ◽  
Hongmei Li ◽  
Yangsu Zeng
Keyword(s):  
Photocatalytic Activity ◽  
Surface Modification ◽  
Visible Light ◽  
Photoelectron Spectroscopy ◽  
Impregnation Method ◽  
Light Spectra ◽  
Simple Strategy ◽  
Visible Light Active ◽  
Efficient Charge ◽  
Surface Modified

Tungsten trioxide (WO3) was surface modified with Cu(II) nanoclusters and titanium dioxide (TiO2) nanopowders by using a simple impregnation method followed by a physical combining method. The obtained nanocomposites were studied by scanning electron microscope, X-ray photoelectron spectroscopy spectra, UV-visible light spectra, and photoluminescence, respectively. Although the photocatalytic activity of WO3was negligible under visible light irradiation, the visible light photocatalytic activity of WO3was drastically enhanced by surface modification of Cu(II) nanoclusters and TiO2nanopowders. The enhanced photocatalytic activity is due to the efficient charge separation by TiO2and Cu(II) nanoclusters functioning as cocatalysts on the surface. Thus, this simple strategy provides a facile route to prepare efficient visible-light-active photocatalysts for practical application.

Visible-light-active photocatalytic thin film by RF sputtering for hydrogen generation

2012 ◽  
Vol 8 (2) ◽  
pp. 283-291 ◽  
Author(s):  
Chi-Hung Liao ◽  
Chao-Wei Huang ◽  
Jeffrey Chi-Sheng Wu
Keyword(s):  
Thin Film ◽  
Visible Light ◽  
Hydrogen Generation ◽  
Rf Sputtering ◽  
Visible Light Active
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