Article
Chemistry, Physical
Maria-Athina Apostolaki, Elias Sakellis, Polychronis Tsipas, Maria Giannouri, Spiros Gardelis, Nikos Boukos, Athanasios Dimoulas, Vlassis Likodimos
Summary: Heterostructured WO3/TiO2 photonic crystal films in the form of three-dimensional macroporous inverse opals were developed by single-step, three-phase co-assembly of colloidal templates with water soluble precursors. The properties of the inverse opals could be controlled by adjusting the W/Ti molar ratio and macropore diameter. This method provides a promising route for the development of heterostructured inverse opal networks with tailored electronic properties and improved solar light harvesting.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Jiaye Ye, Chunhua Zheng, Jie Liu, Tianfu Sun, Shuhui Yu, Huiyun Li
Summary: A novel hybrid membrane for vanadium redox flow batteries has been developed, showing good ion permeation barrier properties, which enhance the stability and energy efficiency of the battery. The design method of this membrane can be extended to other fields such as water treatments and fuel cells.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Hong Ma, Shuyang Li, Yan Tong, Xiaolong Liu, Wenxiang Mu, Xutang Tao
Summary: The origin of unintentional n-type conductivity in wide-band-gap oxides is still debated. This study investigates the physical characteristics of H-containing defects in high-quality fl-Ga2O3 single crystals through solid-state nuclear magnetic resonance and Fourier transform infrared spectroscopy. It is found that the n-type conductivity in fl-Ga2O3 is caused by the VGa-H2+1 complex formed by three trapped protons in half vacancies. The bridged protons in Ga-O(H2)-Ga bonds act as shallow donors, contributing to the conductivity.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Charles R. Lhermitte, Nukorn Plainpan, Pamela Canjura, Florent Boudoire, Kevin Sivula
Summary: The study demonstrates the direct photo-oxidization of HMF by WO3 photoanodes, producing key monomers like DFF and FDCA with modest yields of up to 4% and 1% respectively. Quantification of reaction rate constants provides insight into the by-product formation and suggests routes for yield improvement.
Article
Chemistry, Physical
Sandile S. Gwebu, Cyril T. Selepe, Thabo Matthews, Memory Zikhali, Tebogo A. Mashola, Siyabonga P. Mbokazi, Thobeka S. Makhunga, Nobanathi W. Maxakato
Summary: Tungsten (VI) oxide (WO3) was used as a stable secondary support and cocatalyst, and functionalized carbon nanodots were blended with WO3 nanoparticles to form a composite support for Pd nanoparticles. The synthesized Pd/fCNDs-WO3 electrocatalysts showed remarkable catalytic activity for methanol and ethanol oxidation. The presence of WO3 in the Pd/fCNDs electrocatalyst improved the kinetics, tolerance to poisoning, and long-term durability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Beatriz Rodriguez, Jaime Dolado, Jesus Lopez-Sanchez, Pedro Hidalgo, Bianchi Mendez
Summary: Polymorphous WO3 micro- and nanostructures were synthesized by joule heating of tungsten wires, assisted by an external electric field, resulting in the growth of WO3 on both wire surface and copper electrodes. The temperature measurements confirmed the calculated threshold density current required for WO3 growth. The structural characterization revealed the presence of gamma-WO3, delta-WO3, and e-WO3 phases, which offer high oxygen vacancy concentration for various applications. These findings can facilitate the production of oxide nanomaterials from other metal wires using the resistive heating method.
Article
Chemistry, Applied
Yue Liu, Wei Zhang, Haichao Liu
Summary: Tungsten-based catalysts, including WO3 and H2WO4, can selectively cleave C-C bonds in sugar intermediates during the conversion of cellulose to ethylene glycol and propylene glycol. The catalysts undergo reduction to HxWO3 species during the reaction, which act as heterogeneous catalysts and are re-oxidized to WO3 upon exposure to ambient air after the reaction. The activity of WO3 is strongly dependent on its crystallite size and surface area.
CHINESE JOURNAL OF CATALYSIS
(2023)
Article
Green & Sustainable Science & Technology
Lingbo Liu, Jian Li, Bangguo Xiong, Yujie Hu, Zhimei Xia, Longgang Ye
Summary: This study proposes a method to selectively leach waste tungsten powder using H2O2, obtaining pure peroxotungstic acid solution, and then directly preparing nano-WO3 through spray pyrolysis. The experiment shows that under certain conditions, waste tungsten powder can be efficiently leached, and nano-WO3 can be prepared using the leachate.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Physical
Yingying Fan, Peiyun Zhang, Rongxia Lu, Yuheng Jiang, Guoliang Pan, Wei Wang, Xianglian Zhu, Shilei Wei, Dongxue Han, Li Niu
Summary: This study presents a tungsten trioxide photocatalyst modified with {001}, {010} and {100} facets, allowing for the intermediate-free oxidation of methane into formaldehyde with 99.4% selectivity. A durable formaldehyde yield of 4.61 mmol g(-1) is achieved after 30 hours of irradiation. Surface defect and reactive lattice oxygen atom are found to be crucial for selectivity and productivity enhancement. This work provides a valid paradigm for efficiently converting methane to formaldehyde.
CATALYSIS COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
V. Anbumannan, R. T. Rajendra Kumar, K. Suresh
Summary: A novel GO/WO3 nanocomposite material was successfully prepared and used for the electrochemical detection of dopamine on a glassy carbon electrode, showing wide linear range, outstanding selectivity, and great performance in real samples with high selectivity and good stability.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Chemistry, Physical
Shilei Wei, Xianglian Zhu, Peiyun Zhang, Yingying Fan, Zhonghui Sun, Xin Zhao, Dongxue Han, Li Niu
Summary: A direct photocatalytic conversion of methane to formaldehyde over gold modified cuboid-shaped tungsten trioxide with exposed crystal-O facets has been reported, achieving high productivity and selectivity of formaldehyde under room temperature conditions. The activation of C-H bonds in methane by high spin state crystal-O ions, combined with the extraction of photoexcited electrons by metallic gold, results in efficient formation of formaldehyde. Isotopic tests confirm the origin of formaldehyde from the combination of methane and crystal-O on the exposed facets.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Analytical
Lingbo Liu, Bangguo Xiong, Xiaosa Zhang, Longgang Ye
Summary: In this study, non-agglomerated tungsten oxide was prepared by vacuum pyrolysis of ammonium paratungstate (APT), showing that different temperature, heating rate, and holding time have effects on the morphology and particle size of products. Compared with atmospheric decomposition, the vacuum environment is conducive to the preparation of narrow tungsten oxide products.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Chemistry, Analytical
Mohadese Rastgoo-Deylami, Mehran Javanbakht, Hamid Omidvar, Khadijeh Hooshyari, Parisa Salarizadeh, Mohammad Bagher Askari
Summary: In this study, the effect of nickel doping on monoclinic tungsten trioxide (mWO(3)) as an anode electrode for lithium ion batteries (LIBs) was investigated. The experimental results showed that 10 wt% nickel doping led to the highest improvements in electrochemical performance of mWO(3), including higher electrochemical capacities, good cycle life, and better rate capability. These enhancements were attributed to the spherical morphology of nanoparticles and the high electrical conductivity provided by nickel doping, which facilitated lithium-ion diffusion and electron transfer in the monoclinic structure of WO3. The reported anode electrode exhibited excellent properties in LIBs for various energy storage applications.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Review
Green & Sustainable Science & Technology
Nur Aqilah Mohd Razali, Wan Norharyati Wan Salleh, Farhana Aziz, Lau Woei Jye, Norhaniza Yusof, Ahmad Fauzi Ismail
Summary: This article discusses the current research status and issues of tungsten trioxide (WO3) as a promising photocatalyst for wastewater treatment, exploring the importance of improving efficiency and summarizing different precursors, synthesis methods, modification types, and operational parameters in a photocatalytic system. The review emphasizes the impact of photocarrier recombination on the widespread application of WO3.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Physical
Zheng Li, Dongzhi Zhang, Xingwei Wang, Xichen Liu, Yan Yang, Chen Du, Jingyu Guo, Yating Zhang
Summary: In this study, a high-sensitive WO3/MXene composite based gas sensor was developed. The morphology, crystal structure, and chemical composition of the pure WO3, MXene and WO3/MXene composite were analyzed, confirming the successful synthesis of these materials. The gas-sensing performance of the WO3/MXene sensor showed excellent response, fast response/recovery time, repeatability, selectivity, and short-term and long-term stability for trimethylamine detection at room temperature. Additionally, a tag type gas detection device based on NFC technology was developed for non-contact testing in hazardous gas environments.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)