CdS-Based Photocatalysts for Solar Water Splitting

2021 ◽  
Vol 02 ◽  
Author(s):  
Yimeng Cao ◽  
Chuhong Zhu ◽  
Taotao Wang ◽  
Daochuan Jiang ◽  
Sheng Ye
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Production ◽  
Visible Light ◽  
Water Splitting ◽  
Light Absorption ◽  
Narrow Band ◽  
Heteroatom Doping ◽  
Visible Light Absorption ◽  
Solar Water Splitting ◽  
Band Position

: Photocatalytic water splitting for hydrogen production is a promising pathway for solar energy convention into chemicals. Among various semiconductor-based photocatalysts, cadmium sulfide (CdS) attracted extensive attentions due to the narrow band gap nature (2.4 eV) for efficient visible light absorption, suitable band position for water splitting, and outstanding photocatalytic activity. In this review, we summarize the recent advances for the synthesis of CdS, and modification strategies including heteroatom doping, loading cocatalysts, and hetero/homo-junction fabrication are also presented. Moreover, a brief perspective and challenges on CdS-based photocatalyst are also discussed.

Carrier Engineering of Zr-mediated Ta3N5 Film as Efficient Photoanode for Solar Water Splitting

2021 ◽  
Author(s):  
Xin Zou ◽  
Xueyang Han ◽  
Chengxiong Wang ◽  
Yunkun Zhao ◽  
Chun Du ◽  
...  
Keyword(s):  
Band Structure ◽  
Visible Light ◽  
Water Splitting ◽  
Light Absorption ◽  
Photoelectrochemical Water Splitting ◽  
Promising Candidate ◽  
Visible Light Absorption ◽  
Solar Water ◽  
Solar Water Splitting

Ta3N5 is regarded as a promising candidate material with adequate visible light absorption and band structure for photoelectrochemical water splitting. However, the performance of Ta3N5 is severely limited by the...

scholarly journals The synergistic effect of cation mixing in mesoporous BixFe1−xVO4 heterojunction photoanodes for solar water splitting

2019 ◽  
Vol 7 (24) ◽  
pp. 14816-14824 ◽  
Author(s):  
Mengyuan Zhang ◽  
Huu Khue Pham ◽  
Yanan Fang ◽  
Ying Fan Tay ◽  
Fatwa F. Abdi ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Synergistic Effect ◽  
Visible Light ◽  
Water Splitting ◽  
Light Absorption ◽  
Visible Light Absorption ◽  
Solar Water ◽  
Solar Water Splitting ◽  
Interesting Class ◽  
Cation Mixing

Mixed metal vanadates are an interesting class of materials due to their favorable bandgap for visible light absorption and their catalytic activity.

Enabling efficient visible light photocatalytic water splitting over SrTaO2N by incorporating Sr in its B site

2018 ◽  
Vol 6 (42) ◽  
pp. 20760-20768 ◽  
Author(s):  
Xiaoqin Sun ◽  
Fangfang Wu ◽  
Gang Liu ◽  
Xiaoxiang Xu
Keyword(s):  
Photocatalytic Activity ◽  
Solar Energy ◽  
Visible Light ◽  
Energy Conversion ◽  
Water Splitting ◽  
Light Absorption ◽  
Solar Energy Conversion ◽  
Visible Light Absorption ◽  
Photocatalytic Water Splitting ◽  
Visible Light Photocatalytic

The perovskite oxynitride SrTaO2N is a promising compound for solar energy conversion because it has strong visible light absorption at wavelengths as long as 650 nm. However, the photocatalytic activity of SrTaO2N is generally very poor. We managed to improve its activity by incorporating Sr in its B site.

Impact of Rutile Fraction on TiO2 Visible-Light Absorption and Visible-Light-Induced Photocatalytic Activity

2018 ◽  
Author(s):  
David Maria Tobaldi ◽  
Luc Lajaunie ◽  
ana caetano ◽  
nejc rozman ◽  
Maria Paula Seabra ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Light Absorption ◽  
Solid Phase ◽  
Diffraction Method ◽  
Band Alignment ◽  
Quantitative Phase Analysis ◽  
Transmission Microscopy ◽  
Visible Light Absorption ◽  
X Ray

<div>Titanium dioxide is by far the most utilised semiconductor material for photocatalytic applications. Still, it is transparent to visible-light. Recently, it has been proved that a type-II band alignment for the rutile−anatase mixture would improve its visible-light absorption.</div><div>In this research paper we thoroughly characterised the real crystalline and amorphous phases of synthesised titanias – thermally treated at different temperatures to get distinct ratios of anatase-rutile-amorphous fraction – as well as that of three commercially available photocatalytic nano-TiO2. </div><div>The structural characterisation was done via advanced X-ray diffraction method, namely the Rietveld-RIR method, to attain a full quantitative phase analysis of the specimens. The microstructure was also investigated via an advanced X-ray method, the whole powder pattern modelling. These methods were validated combining advanced aberration-corrected scanning transmission microscopy and high-resolution electron energy-loss spectroscopy. The photocatalytic activity was assessed in the liquid- and gas-solid phase (employing rhodamine B and 4-chlorophenol, and isopropanol, respectively, as the organic substances to degrade) using a light source irradiating exclusively in the visible-range.</div><div>Optical spectroscopy showed that even a small fraction of rutile (2 wt%) is able to shift to lower energies the apparent optical band gap of an anatase-rutile mixed phase. But is this enough to attain a real photocatalytic activity promoted by merely visible-light?</div><div>We tried to give a reply to that question.</div><div>Photocatalytic activity results in the liquid-solid phase showed that a high surface hydroxylation led to specimen with superior visible light-induced catalytic activity (i.e. dye and ligand-to-metal charge transfer complexes sensitisation effects). That is: not photocatalysis <i>sensu-strictu</i>.</div><div>On the other hand, the gas-solid phase results showed that a higher amount of the rutile fraction (around 10 wt%), together with less recombination of the charge carriers, were more effective for an actual photocatalytic oxidation of isopropanol.</div>

scholarly journals Nickel and sulfur codoped TiO2 nanoparticles for efficient visible light photocatalytic activity

2021 ◽  
Author(s):  
Mehala Kunnamareddy ◽  
Ranjith Rajendran ◽  
Megala Sivagnanam ◽  
Ramesh Rajendran ◽  
Barathi Diravidamani
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Light Absorption ◽  
Fourier Transforms ◽  
Phase Particle ◽  
Energy Dispersive Spectrometer ◽  
Sol Gel ◽  
Bandgap Energy ◽  
Visible Light Absorption

AbstractIn this work, Nickel (Ni) and sulfur (S) codoped TiO2 nanoparticles were prepared by a sol-gel technique. The as-prepared catalyst was characterized using X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FTIR), FT-Raman spectroscopy, scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), transmission electron microscopy (TEM), UV-Vis diffuse reflectance spectra (DRS) for investigating crystal structure, crystal phase, particle size and bandgap energy of these samples. The photocatalytic performances of all the prepared catalysts have been investigated for the degradation of methylene blue (MB) under visible light irradiation. It was noticed that Ni-S codoped TiO2(Ni-S/TiO2) nanoparticles exhibited much higher photocatalytic activity compared with pure, Ni and S doped TiO2 due to higher visible light absorption and probable decrease in the recombination of photo-generated charges. It was decided that the great visible light absorption was created for codoped TiO2 by the formation of impurity energy states near both the edges of the collection, which works as trapping sites for both the photogenerated charges to decrease the recombination process.

Photocatalytic activity of ZrO2 composites with graphitic carbon nitride for hydrogen production under visible light

2019 ◽  
Vol 43 (11) ◽  
pp. 4455-4462 ◽  
Author(s):  
Mohammed Ismael ◽  
Ying Wu ◽  
Michael Wark
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Production ◽  
Visible Light ◽  
Water Splitting ◽  
Carbon Nitride ◽  
Graphitic Carbon Nitride ◽  
Superior Performance ◽  
Electron Hole ◽  
Effective Electron ◽  
Composite Interface

The synthesized ZrO2/g-C3N4 composites exhibit superior performance in water splitting for hydrogen production due to the effective electron–hole separation at the composite interface.

ZnS quantum dot intercalated layered double hydroxide semiconductors for solar water splitting and organic pollutant degradation

2019 ◽  
Vol 7 (18) ◽  
pp. 11408-11422 ◽  
Author(s):  
Ali Reza Amani-Ghadim ◽  
Fatemeh Khodam ◽  
Mir Saeed Seyed Dorraji
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Water Splitting ◽  
Organic Pollutant ◽  
Pollutant Degradation ◽  
Solar Water Splitting ◽  
Organic Pollutant Degradation ◽  
Double Hydroxide ◽  
Oppositely Charged ◽  
Visible Light Photocatalytic

MIIZnAl-LDH/ZnS QD (MII = Co or Mn) nanocomposites were synthesized by assembling oppositely charged 2D LDH layers and ZnS QDs. The MIIZnAl-LDH/ZnS QDs exhibited enhanced visible light harvesting ability, considerable visible light photocatalytic activity and photostability.

Sign in / Sign up

Export Citation Format

Share Document