Effective Solar-Light-Driven Photocatalytic Production of Hypobromous Acid on Film-Like Photocatalyst Sheets

2021 ◽  
Author(s):  
Rui Pang ◽  
Yugo Miseki ◽  
Kazuhiro Sayama
Keyword(s):  
Visible Light ◽  
Solar Light ◽  
Simulated Solar Light ◽  
Hypobromous Acid ◽  
Visible Light Active

Photocatalytic production of hypobromous acid (HBrO) by oxidation of bromide (Br−) under simulated solar light was successfully obtained over visible-light active photocatalysts. Among all photocatalysts, the platinum (Pt) cocatalyst-loaded tungsten...

Self-Assembled Reduced Graphene Oxide-TiO2 Thin Film for the Enhanced Photocatalytic Reduction of Cr(VI) Under Simulated Solar Irradiation

2019 ◽  
Vol 19 (6) ◽  
pp. 3376-3387 ◽  
Author(s):  
Hongyuan Shang ◽  
Min Ma ◽  
Fasheng Liu ◽  
Zhe Miao ◽  
Aiping Zhang
Keyword(s):  
Thin Film ◽  
Graphene Oxide ◽  
Visible Light ◽  
Reduced Graphene Oxide ◽  
Rate Constant ◽  
Solar Irradiation ◽  
Solar Light ◽  
X Ray ◽  
Simulated Solar Light ◽  
Reduced Graphene

In this study, reduced graphene oxide-TiO2 (RGO-TiO2) thin film was prepared by a simple self-assembly method at the gas/liquid interface. The as-prepared thin films were characterized by X-ray diffraction (XRD), Raman spectra, scanning electron microscopy (SEM), UV-visible-diffuse reflectance spectroscopy (UV-vis-DRS) and X-ray photoelectron spectroscopy (XPS). Photocatalytic activities of TiO2 and RGO-TiO2 thin film were investigated via the reduction of Cr(VI) under simulated solar light and visible light (λ > 420 nm) irradiation. The results showed that the RGO-TiO2 thin film exhibited remarkably enhanced activity for photoreduction of Cr(VI) under simulated sunlight or visible light irradiation, with a reaction rate constant of 5.7 times greater than that of pure TiO2 thin film. The main reason for enhanced photocatalytic activity is that introduction of RGO can restrain the recombination of photogenerated electron–hole pairs and reduce the aggregation of TiO2 NPs. The effects of different reaction parameters such as irradiation time, irradiation source, pH values, catalyst dosage and initial Cr(VI) concentration were investigated in detail. The highest photoreduction efficiency of Cr(VI) was achieved and the reduction rate constant k was 0.0189 min−1 during the reduction of 0.5 mg L−1 of Cr(VI) with 10 cm2 RGO-TiO2 thin film at pH 2.0 and 293 K. Moreover, different scavengers were also added in the photoreduction of Cr(VI) system to identify the reactive species. Based on the results of the present study, a possible mechanism of photoreduction on RGO-TiO2 thin film under simulated solar light was proposed. Overall, this study provides a novel approach to efficiently photoreduction of Cr(VI) by RGO-TiO2 thin film.

scholarly journals Solar-light-active mesoporous Cr–TiO2 for photodegradation of spent wash: an in-depth study using QTOF LC-MS

RSC Advances ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 4226-4238 ◽  
Author(s):  
Shrikant P. Takle ◽  
Onkar A. Apine ◽  
Jalindar D. Ambekar ◽  
Sukeshani L. Landge ◽  
Namdeo N. Bhujbal ◽  
...  
Keyword(s):  
Visible Light ◽  
Solar Light ◽  
Toxic Compounds ◽  
Spent Wash ◽  
Natural Sunlight ◽  
Visible Light Active ◽  
Depth Study

A dark coloured effluent called “spent wash” is generated as an unwanted product in sugar based alcohol distillery which is degraded to less toxic compounds using visible light active Cr–TiO2 photocatalyst under natural sunlight.

A stable Bi2S3 quantum dot–glass nanosystem: size tuneable photocatalytic hydrogen production under solar light

RSC Advances ◽  
2015 ◽  
Vol 5 (72) ◽  
pp. 58485-58490 ◽  
Author(s):  
Sunil R. Kadam ◽  
Rajendra P. Panmand ◽  
Ravindra S. Sonawane ◽  
Suresh W. Gosavi ◽  
Bharat B. Kale
Keyword(s):  
Hydrogen Production ◽  
Quantum Dot ◽  
Visible Light ◽  
Glass Matrix ◽  
Active Catalyst ◽  
Solar Light ◽  
Photocatalytic Hydrogen Production ◽  
Visible Light Active

Herein, we have demonstrated the growth of uniformly distributed Bi2S3 QDs in a glass matrix as a visible light active catalyst for efficient solar H2 production.

scholarly journals Visible-Light-Active Photocatalysts for Environmental Remediation and Organic Synthesis

Photochem ◽  
2021 ◽  
Vol 1 (3) ◽  
pp. 460-461
Author(s):  
Vincenzo Vaiano
Keyword(s):  
Visible Light ◽  
Organic Synthesis ◽  
Environmental Remediation ◽  
Solar Light ◽  
Visible Light Active ◽  
Synthesis Reactions

In recent years, the formulation of innovative photocatalysts activated by visible or solar light has been attracting increasing attention because of their notable potential for environmental remediation and use in organic synthesis reactions [...]

Effect of W doping level on TiO2 on the photocatalytic degradation of Diuron

2016 ◽  
Vol 75 (1) ◽  
pp. 20-27 ◽  
Author(s):  
Ghania Foura ◽  
Ahcène Soualah ◽  
Didier Robert
Keyword(s):  
Visible Light ◽  
Separation Efficiency ◽  
Diffuse Reflectance Spectroscopy ◽  
Sol Gel ◽  
Pure Tio2 ◽  
Solar Light ◽  
X Ray Diffraction ◽  
Simulated Solar Light ◽  
Uv Visible ◽  
Doped Titania

In the present study, three compositions of W-doped titania nano-photocatalyst are synthesized via the sol–gel method. The powders obtained were characterized by X-ray diffraction, Raman spectroscopy and UV–visible diffuse reflectance spectroscopy. The photocatalytic performances of the different photocatalysts are tested with respect to the degradation of Diuron in water solutions under simulated solar light and visible light irradiation. The W0.03Ti0.97O2 catalyst exhibits better photoactivity than the pure TiO2 even under simulated solar light and visible light. This improvement in activity was attributed to photoelectron/hole separation efficiency.

scholarly journals Engineering TiO2 nanosheets with exposed (001) facets via the incorporation of Au clusters for boosted photocatalytic hydrogen production

2020 ◽  
Vol 1 (6) ◽  
pp. 1608-1612
Author(s):  
Xiaobin Liu ◽  
Huaqiang Zhuang ◽  
Jiale Huang ◽  
Wentao Xu ◽  
Liqin Lin ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Hydrogen Generation ◽  
Light Irradiation ◽  
Solar Light ◽  
Photocatalytic Hydrogen Production ◽  
Simulated Solar Light ◽  
Au Clusters ◽  
Tio2 Nanosheets

Incorporation of glutathione-protected Au clusters to TiO2 nanosheets as a photosensitizer and cocatalyst triggers and significantly improves their hydrogen generation performance under simulated solar light or visible light irradiation.

scholarly journals Stabilized fabrication of anatase-TiO2/FeS2 (pyrite) semiconductor composite nanocrystals for enhanced solar light-mediated photocatalytic degradation of methylene blue

RSC Advances ◽  
2018 ◽  
Vol 8 (22) ◽  
pp. 11935-11945 ◽  
Author(s):  
Jamshaid Rashid ◽  
Sahar Saleem ◽  
Saif Ullah Awan ◽  
A. Iqbal ◽  
Rajeev Kumar ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Chemical Process ◽  
Anatase Tio2 ◽  
Solar Light ◽  
Visible Light Active ◽  
Wet Chemical ◽  
Semiconductor Photocatalyst ◽  
Fes2 Pyrite

A novel visible light active TiO2/FeS2 semiconductor photocatalyst was synthesized by a simple wet chemical process.

Visible Light Active Ce-doped TiO2 Nanoparticles for Photocatalytic Degradation of Methylene Blue

2016 ◽  
Vol 13 (1) ◽  
pp. 110-116 ◽  
Author(s):  
Rani P. Barkul ◽  
Farah-Naaz A. Shaikh ◽  
Sagar D. Delekar ◽  
Meghshyam K. Patil
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Tio2 Nanoparticles ◽  
Doped Tio2 ◽  
Visible Light Active
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