We prepared tungsten trioxide (WO3) photoelectrode films from organic-additive-free aqueous solutions by a low-speed dip-coating technique. The evaporation-driven deposition of the solutes occurred at the meniscus during low-speed dip coating, resulting in the formation of coating layer on the substrate. Homogeneous WO3 precursor films were obtained from (NH4)10W12O41·5H2O aqueous solutions and found to be crystallized to monoclinic WO3 films by the heat treatment at 400-700 °C. All the films showed a photoanodic response irrespective of the heat treatment temperature, where a good photoelectrochemical stability was observed for those heated over 500 °C. The highest photoanodic performance was observed for the WO3 film heated at 700 °C, where the IPCE (incident photon-to-current efficiency) was 36.2% and 4.6% at 300 and 400 nm, respectively.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.langmuir.6b00377 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Employing Triphenylene-Based, Layered, Conductive Metal-Organic Framework Materials as Electrochemical Sensors for Nitric Oxide in Aqueous Media.
ACS Sens
January 2025
Department of Chemistry, Burke Laboratories, Dartmouth College, 41 College St., Hanover, New Hampshire 03755, United States.
This paper describes the first use of conductive metal-organic frameworks as the active material in the electrochemical detection of nitric oxide in aqueous solution. Four hexahydroxytriphenylene (HHTP)-based MOFs linked with first-row transition metal nodes (M = Co, Ni, Cu, Zn) were compared as thin-film working electrodes for promoting oxidation of NO using voltammetric and amperometric techniques. Cu- and Ni-linked MOF analogs provided signal enhancement of 5- to 7-fold over a control glassy carbon electrode (SA = 6.
View Article and Find Full Text PDFFlexible and Robust Piezoelectric Chitosan Films with Enhanced Bioactivity.
Biomacromolecules
January 2025
Department of Material Engineering, Indian Institute of Science, Bangalore 560012, Karnataka, India.
Chitosan (CHT) is a known piezoelectric biomacromolecule; however, its usage is limited due to rapid degradation in an aqueous system. Herein, we prepared CHT film via a solvent casting method and cross-linked in an alkaline solution. Sodium hydroxide facilitated deprotonation, leading to increased intramolecular hydrogen bonding and mechanical properties.
View Article and Find Full Text PDFAnionic modulation induces molecular polarity in a three-component crown ether system.
Dalton Trans
January 2025
School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, People's Republic of China.
Three-component crown ether phase change materials are characterized by a structural phase change in response to external stimuli such as temperature and electric or magnetic fields, resulting in significant changes in physical properties. In this work, we designed and synthesized two novel host-guest crown ether molecules [(PTFMA)(15-crown-5)ClO] (1) and [(PTFMA)(15-crown-5)PF] (2), through the reaction of -trifluoromethylaniline (PTFMA) with 15-crown-5 in perchloric acid or hexafluorophosphoric acid aqueous solution. Compound 1 undergoes a structural change from the non-centrosymmetric space group (2) to the centrosymmetric space group (2/) with increasing temperature.
View Article and Find Full Text PDFAcid-Base Equilibrium of 5,5,6-Trihydroxy-6-Methyldihydropyrimidine-2,4(1,3)-Dione in the Gas Phase and in Water.
J Phys Chem A
January 2025
Ufa Institute of Chemistry, Ufa Federal Research Centre of the Russian Academy of Sciences, Laboratory of Physicochemical Methods of Analysis, 69 Prospekt Oktyabrya, Ufa 450054, Russian Federation.
The first-stage acid-base equilibrium of 5,5,6-trihydroxy-6-methyldihydropyrimidine-2,4(1,3)-dione was studied for the first time in aqueous solutions. Its constant (pK = 9.23 ± 0.
View Article and Find Full Text PDFTrace level detection of Pb ion using organic ligand as fluorescent-on probes in aqueous media.
Heliyon
January 2025
Department of Pharmaceutical Chemistry, College of Pharmacy King Saud University, Riyadh Saudi Arabia.
In this study, an optical sensor, JA/(2,6-di((E)-benzylidene)cyclohexan-1-one), was synthesized and characterized using H NMR and FT-IR spectroscopy. The sensor exhibited high efficiency and selectivity in detecting Pb ions, even in the presence of potential interfering ions such as Mn, Cu, Co, Cr, Ni, Ce, Hg, and Cd in aqueous solutions. The interaction of JA with Pb resulted in a significant enhancement of fluorescence intensity, suggesting the formation of a stable complex.
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!