Hexavalent chromium Cr(VI), a highly toxic oxyanion, widely occurs in drinking water supplies. This study designed and synthesized a new type of highly reductive TiO nanocrystals for photochemical Cr(VI) removal, via the thermal hydrolysis of TiCl in the presence of diethylene glycol (DEG). Surface analyses and hydroxyl radical measurements suggested that DEG was chemically bonded on TiO surface that resulted in an internal hole-scavenging effect and a high electron-releasing capacity, making it advantageous to conventional TiO materials. Upon UV irradiation, the synthesized TiO photocatalyst exhibited fast Cr(VI) reduction kinetics in diverse water chemical conditions. Fast elimination of Cr(VI) was achieved on a time scale of seconds in drinking water matrices. The removal of Cr(VI) by reductive TiO exhibited a three-stage kinetic behavior: an initial fast-reaction phase, a lag phase resulting from surface precipitation of Cr(OH) and a final reaction phase due to surface regeneration from oxidation-reduction induced ripening process. The lag phase disappeared in acidic conditions that prevented the formation of Cr(OH). The catalyst exhibited extremely high electron-releasing capacity that can be reused for multiple cycles of Cr(VI) removal in drinking water treatment.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.watres.2016.11.013 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Impact of Alkali Metals on CeO-WO/TiO Catalysts for NH-Selective Catalytic Reduction and Lifetime Prediction of Catalysts.
Molecules
November 2024
School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 210009, China.
Ce-based catalysts have been widely used in the removal of nitrogen oxides from industrial flue gas because of their good catalytic performance and environmental friendliness. However, the mechanism of alkali metal poisoning in Ce-based catalysts remains to be further studied. This work involves the preparation of the K/Na-poisoned CeWTi catalyst via the impregnation method for assessing its performance in NO removal.
View Article and Find Full Text PDFLaser Desorption/Ionization on Au@TiO Core@Shell Nanostars for Mass Spectrometric Analysis of Small Molecules.
Nanomaterials (Basel)
December 2024
Department of Chemistry, Dongguk University-Seoul Campus, 30 Pildong-ro 1-gil, Jung-gu, Seoul 04620, Republic of Korea.
The core@shell nanostars composed of star-like Au nanocores with TiO shells (Au@TiO NSs) are synthesized in a one-pot reaction without any reducing or surface-controlling agents. The Au@TiO NSs exhibit strong absorption in the UV region based on the interaction between the Au nanocore and the TiO shell, and this optochemical property leads to the efficient laser desorption/ionization time-of-flight mass spectrometry (LDI-TOF-MS) analysis of small molecules with low background interference and high reproducible mass signals compared with spherical Au nanoparticles (NPs). The limit of detection and dynamic range values of various analytes also improved with Au@TiO NSs compared with those obtained with spherical Au NPs.
View Article and Find Full Text PDFElectroless Ag nanoparticle deposition on TiO nanorod arrays, enhancing photocatalytic and antibacterial properties.
J Colloid Interface Sci
February 2025
School of Science, College of STEM, RMIT University, Melbourne, Victoria 3001, Australia. Electronic address:
Hypothesis: The small size of the nanoparticles used to obtain high surface area photocatalysts makes their removal from solution difficult. Producing photocatalysts on substrates would alleviate this limitation. Adding heterojunctions to photocatalysts, for example, TiO/Ag, could improve photocatalytic performance due to Schottky junction formation and introduce antibacterial properties.
View Article and Find Full Text PDFInsight into Antiviral Activity of Ag/TiO Nanocomposites Against Influenza H1N1 Virus and Its Antiviral Mechanism.
Int J Nanomedicine
November 2024
State Key Laboratory of Respiratory Disease for Allergy at Shenzhen University, Shenzhen Key Laboratory of Allergy & Immunology, School of Medicine, Shenzhen University, Shenzhen, People's Republic of China.
Purpose: Synthesis and characterization of silver (Ag)/titanium dioxide (TiO) nanocomposite (ATA) to investigate its antiviral activity against the H1N1 influenza virus and antiviral mechanisms.
Materials And Methods: A water-dispersible ATA was prepared by a photocatalytic reduction process from AgNO and TiO. The characterization of ATA was performed by ultraviolet-visible spectroscopy, X-ray diffraction, high-resolution transmission electron microscopy and energy-dispersive X-ray spectroscopy.
Influence of Foliar Application of Nanoparticles on Low Temperature Resistance of Rice Seedlings.
Plants (Basel)
October 2024
National Key Laboratory of Crop Genetic Improvement, Ministry of Agriculture Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
Article Synopsis
- Chilling stress negatively impacts the growth and yield of rice seedlings, making it important to find effective solutions to improve rice productivity during early developmental stages.
- * The study investigates the effects of various nanoparticles (ZnO, FeO, TiO, and CeO) on rice seedlings under chilling conditions, comparing their performance to untreated controls.
- * Results showed that nanoparticle treatment improved seedling growth, enhanced antioxidant activity, and reduced oxidative damage, especially in the low-temperature-tolerant variety LLY-7108, suggesting the potential of nanotechnology in agricultural stress mitigation.
Want 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!