Direct conversion of solar energy into clean fuels is emerging as an efficient way for the future energy generation and solving environmental issues. Especially, photocatalytic splitting of water into H under solar light irradiation is one of the best techniques for clean energy production. Also, decomposition of organic pollutants using solar light is an urgent need to protect the environment. Hence, in the present study, we studied Pt-TiO nanotubes based composites for H generation and methyl orange dye degradation under solar light irradiation and compared the effect of deposition methods namely photo-deposition and chemical reduction methods. We have achieved the highest rate of H generation activity compared to other Pt-TiO based composite photocatalysts reported previously, and it is ≈173 mmol·h·g for both photo-deposited and chemically reduced Pt/TiO nanotubes. This is about 46.8 folds higher than the pristine TiO nanotubes at the same experimental conditions. The selected catalysts were tested for degradation of methyl orange dye, where the catalyst prepared by chemical reduction method showed improved activity (94% degradation in 30 min) compared to the one which is prepared by photo-deposition method (50.5% degradation in 30 min). XPS analysis revealed that the photo-deposited catalyst consist only metallic Pt⁰, while the chemical-reduction yielded Pt with multiple oxidation states, Pt⁰, Pt and Pt.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1016/j.jcis.2018.11.077 | DOI Listing |
Nat Commun
January 2025
Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai, China.
Photocatalytic overall water splitting is a promising approach for a sustainable hydrogen provision using solar energy. For sufficient solar energy utilization, this reaction ought to be operated based on visible-light-active semiconductors, which is very challenging. In this work, an F-expedited nitridation strategy is applied to modify the wide-bandgap semiconductor SrTiO for visible-light-driven photocatalytic overall water splitting.
View Article and Find Full Text PDFInt J Biol Macromol
January 2025
School of Chemistry and Chemical Engineering Southeast University, Jiangning District, Nanjing, Jiangsu Province 211189, PR China. Electronic address:
Inkless paper made from photochromic materials has garnered significant interest owing to its potential to reduce both ink and paper pollution during production. In this research, we synthesized a dual-material film (EC-PVP/PGMEA/PMoA) and conducted a detailed investigation of its photochromic response to visible light and its microstructural properties. Initially, the film appeared as a translucent yellow, but upon exposure to visible light, it shifted to blue with a maximum absorption peak of 2.
View Article and Find Full Text PDFJ Colloid Interface Sci
December 2024
Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, PR China; Key Laboratory of Green Cleaning Technology & Detergent of Zhejiang Province, Lishui, Zhejiang 323000, PR China; Zhejiang Provincial Innovation Center of Advanced Textile Technology, Shaoxing, Zhejiang 312000, PR China.
Photothermal superhydrophobic treatment is an effective anti-icing and de-icing method, avoiding damage to equipment caused by ice accumulation in winter. However, the traditional photothermal materials were expensive and the photothermal conversion coatings are hard to remove when unnecessary. Herein, three biochar microspheres with solid, hollow, and flower-like structures (SBMs, HBMs, FBMs) were fabricated to construct photothermal superhydrophobic coatings on the polyester fabric (PET), respectively.
View Article and Find Full Text PDFACS Appl Mater Interfaces
January 2025
Institute of Materials, China Academy of Engineering Physics, Jiangyou 621908, China.
Solar-driven dry reforming of methane (DRM) offers a milder, more cost-effective, and promising environmentally friendly pathway compared to traditional thermal catalytic DRM. Numerous studies have extensively investigated inexpensive Ni-based catalysts for application in solar-driven DRM. However, these catalysts often suffer from activity loss due to carbon accumulation.
View Article and Find Full Text PDFNat Commun
January 2025
Molecular Materials and Nanosystems, Institute of Complex Molecular Systems, Eindhoven University of Technology, partner of Solliance, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands.
All-perovskite tandem photovoltaics are a potentially cost-effective technology to power chemical fuel production, such as green hydrogen. However, their application is limited by deficits in open-circuit voltage and, more challengingly, poor operational stability of the photovoltaic cell. Here we report a laboratory-scale solar-assisted water-splitting system using an electrochemical flow cell and an all-perovskite tandem solar cell.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!