Nowadays, transition-metal phosphides have been reported to function well in photocatalytic water splitting and possess great potential to substitute traditional noble-metal cocatalysts in the future. Herein, p-type cobalt phosphide (CoP-CoP) nanomaterials were synthesized by phosphating the solvothermally prepared Co(OH) nanoflowers at a low temperature (300 °C). Then, we combined the phosphides with commercial TiO through facile mechanical mixing to fabricate a useful noble-metal-free photocatalyst. The phosphating time that had an influence on the composition of phosphides was tuned, and 3 h was an ideal condition after comparison. The cobalt phosphide-modified TiO at the optimal weight percentage (nominal 0.5%) exhibited the highest photocatalytic hydrogen rate of approximately 824.5 μmol g h under simulated sunlight irradiation, which was nearly equal to 160 times that of bare TiO and 1.7 times that of single CoP-modified TiO. The CoP/TiO heterojunction interfaces were studied using photoluminescence (PL), time-resolved PL, and photoelectrochemical methods, which revealed that the effective charge separation and transfer accelerated by the built-in electric field of p-n junction contributed significantly to the photocatalytic performance.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.langmuir.0c03362 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Defect Chemistry Engineering to Regulate the Excellent Value of Nonstoichiometric CaCoO (0 ≤ ≤ 0.06) Ceramics.
ACS Appl Mater Interfaces
January 2025
College of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, P. R. China.
Cobalt-based oxides have attracted significant attention as p-type thermoelectric materials due to their wide operational temperature range. However, their low average figure of merit () value has hindered service performance. A series of cation vacancies as Ca-active sites were introduced into CaCoO (0 ≤ ≤ 0.
View Article and Find Full Text PDFInfluence of Hydration and Temperature on the NaCO Based Transducer Voltage.
Micromachines (Basel)
October 2024
3Nano-SAE Research Center, Faculty of Physics, University of Bucharest, P.O. Box MG 38, 077125 Bucharest-Magurele, Romania.
Article Synopsis
- The study investigates enhancing voltage output from NaCoO by doping it with sodium (up to x = 0.88) and optimizing the p-type thermoelectric leg's efficiency.
- Two unique sample geometries were tested under varying conditions, including the application of a magnetic field, while analyzing the impact of hydration on sodium cobaltite properties at temperatures between 300 and 380 K.
- The research discovered that water injection significantly increased current and power, reaching 75-100 µW at 350-360 K, and led to the development of an electronic circuit for voltage enhancement and energy storage, proposing a potential application in humidity and temperature sensing.
Characterization and enhanced carbon dioxide sensing performance of spin-coated Na- and Li-doped and Co-doped cobalt oxide thin films.
RSC Adv
November 2024
Nanophotonics and Applications (NPA) Lab, Department of Physics, Faculty of Science, Beni-Suef University Beni Suef 62511 Egypt
Article Synopsis
- Monitoring carbon dioxide (CO) levels is crucial for protecting human health and the environment, leading to the development of cost-effective, efficient gas sensors that operate at room temperature.
- This study focuses on creating a CO gas detector using innovative CoO thin films doped with lithium and sodium, which significantly enhances sensor performance, reducing crystallite size and increasing band gap energy.
- The optimized 3% Li, Na-CoO sensor demonstrated impressive sensitivity, a rapid response time of 18.8 seconds, and excellent selectivity for CO, making it suitable for climate change mitigation and industrial use.
Investigation of radioactivity and heavy metal levels in soil samples from neutral and vegetation land of Punjab, India.
Environ Monit Assess
September 2024
Department of Physics, Indian Institute of Technology Ropar, Rupnagar, 140001, Punjab, India.
Article Synopsis
- - The study investigates the radioactivity levels in soil samples from neutral and agricultural sites in Punjab, India, using advanced techniques to understand how land use impacts these levels.
- - Measurements show that while the activity concentrations of various radionuclides are generally within safe limits, gamma dose rates for both land types slightly exceed global averages.
- - Soil analyses also revealed that vegetation land has higher levels of contamination from heavy metals like mercury and arsenic, indicating greater anthropogenic impact compared to neutral land.
2D/2D CoO/BiOCl nanocomposite with enhanced antibacterial activity under full spectrum: Synergism of mesoporous structure, photothermal effect and photocatalytic reactive oxygen species.
J Colloid Interface Sci
January 2025
School of Materials Science and Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai 201418, PR China. Electronic address:
The overuse of antibiotics has caused the emergence of drug-resistant bacteria and even superbugs, which makes it imperative to develop promising antibiotic-free alternatives. Herein, a multimodal antibacterial nanoplatform of two dimensional/two dimensional (2D/2D) mesoporous CoO/BiOCl nanocomposite is constructed, which possesses the effect of "kill three birds with one stone": (1) the use of mesoporous CoO can enlarge the surface area of the nanocomposite and promote the adsorption of bacteria; (2) CoO displays remarkable full-spectrum absorption and photo-induced self-heating effect, which can raise the temperature of CoO/BiOCl and help to kill bacteria; (3) the p-type CoO and n-type BiOCl form a p-n heterojunction, which promotes the separation of photoelectrons and holes, thus producing more reactive oxygen species (ROS) for killing bacteria. The synergism of mesoporous structure, photothermal effect and photocatalytic ROS makes the developed CoO/BiOCl a promising antibacterial material, which shows outstanding antibacterial activity with an inhibition rate of nearly 100 % against Escherichia coli (E.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!