CHINESE JOURNAL OF CATALYSIS
·
2018
·Vol. 38
·期 12
·2132-2140
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IF 3.525
Lingfeng Li,Xiaolong Zhao,Donglai Pan,Guisheng Li
Photoactive WO 3 is attractive as a photocatalyst for green energy evolution through water splitting. In the present work, an electrochemical anodic oxidation method was used to fabricate a photo-responsive nanotube array-like WO 3 /W (NA-WO 3 /W) photoanode from W foil as a precursor. Compared with a reference commercial WO 3 /W electrode, the NA-WO 3 /W photoanode exhibited enhanced and stable photoelectrocatalytic (PEC) activity for visible-light-driven water splitting with a typical H 2 /O 2 stoichiometric ratio of 2:1 and quantum efficiency of approximately 5.23% under visible-light irradiation from a light-emitting diode ( λ = 420 nm, 15 mW/cm 2 ). The greatly enhanced PEC performance of the NA-WO 3 /Wphotoanode was attributed to its fast electron–hole separation rate, which resulted from the one-dimensional nanotube array-like structure, high crystallinity of monoclinic WO 3 , and strong interaction between WO 3 and W foil. This work paves the way to a facile route to prepare highly active photoelectrodes for solar light transfer to chemical energy .
研究领域:
材料科学
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物理化学
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能源化学
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纳米科技
·
光催化
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电化学
·
可再生能源
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Yihui Li,Kun Chang,Hongwei Tang,Bao Li,Yalei Qin,Yan Hou,Zhaorong Chang
To address the large structural and volume changes of commercial WO 3 during charge/discharge, which make this material unsuitable for use in Li-ion batteries (LIBs), we herein prepared oxygen deficient WO 3- x nanosheets on a large scale by thermal treatment of ammonium paratungstate in a reducing atmosphere followed by sonication and freeze-drying. The above nanosheets were employed as LIB anode materials and exhibited a specific capacity and cycling stability significantly exceeding those of oxygen-deficient WO 3- x nanoparticles and commercial WO 3 . In addition, we investigated the effect of nanosheet loading on electrode performance, demonstrating that the best results (Li storage capacity of ∼628 mAh g −1 after 100 cycles at 100 mA g −1 ) were obtained at a nanosheet content of 20 wt%. This excellent performance was ascribe to the good exposure of defects caused by the comparatively small size of WO 3- x nanosheets , which resulted in an increased number of sites and diffusion paths available for Li-ion storage and transfer. The novel electrode-optimized strategy may be extended to the fabrication of other electrodes that use nanomaterials as active substances due to its superior comprehensive performance and low cost.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
电池技术
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DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 33
·18690-18697
·
IF 2.936
Qian Liu,Zijie Xu,Wu Qiu,Chen Hou,Yanan Wang,Peijian Yao,Rui Yu,Wenxi Guo,Xiang Yang Liu
Ultraflexible electronics have received extensive attention due to their favorable properties, such as superior mechanical robustness, light weight and good compatibility with large-area roll-to-roll fabrication. Here we present a flexible sandwiched tungsten trioxide/silver nanotrough network/poly(3,4-ethylenedioxythiophene)–poly(styrene sulfonate) multi-layer transparent conducting electrode with prominent conductivity (sheet resistance as low as 1.08 Ω sq−1) and transparency (85%). In particular, the flexible transparent electrode exhibits excellent mechanical robustness upon bending and stretching. This hybrid electrode can be further adhered tightly to a layer of WO3 to form an electrochromic device, which simultaneously displays a rapid switching time (0.75 s/1.82 s for bleaching/coloring) and high cyclic performance (86% retention of the initial optical contrast after cycling for 30 000 s). In addition, our electrode can also be fabricated on various flexible substrates, such as polyethylene cling wrap, polydimethylsiloxane and Ecoflex, with sustained electrochromic properties after bending, twisting, stretching and even strong kneading. Our work provides new opportunities for the next generation of flexible and wearable electronics applied on various flexible substrates.
研究领域:
材料科学
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纳米科技
·
柔性电子学
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功能材料
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电化学
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高分子材料
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器件物理
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DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2017
·
IF 3.012
Y.X. Wei,Y.B. Ma,M. Chen,W.M. Liu,L. Li,Y. Yan
Electrochromic devices (ECDs) based on WO 3 and Ti doped V 2 O 5 films are fabricated by using lithium (LiClO 4 ) liquid electrolyte containing ferrocene redox couple . The addition of ferrocene in electrolyte enhances electrochromic properties of device. The device based on LiClO 4 -Ferrocene electrolyte has larger charge density than that based on LiClO 4 electrolyte. In the 600–1500 nm wavelength range, the transmittance of colored device is under 2% and it has faster coloring response. At 680 nm wavelength, it shows larger changes in transmittance from 68% to 1.8% while device based on LiClO 4 electrolyte changes transmittance from 68.3% to 11.5%. The cycling data reveal that device based on LiClO 4 -Ferrocene electrolyte can yield more stable electrochromic properties at 65 °C than room temperature. In order to deeper understand the effect of electrolyte on films and devices, electrochemical impedance spectroscopy (EIS) and the voltage distribution of films based on an analog cell are separately measured and analyzed in LiClO 4 and LiClO 4 -Ferrocene electrolytes. Results indicate that compared with LiClO 4 electrolyte, films have lower charge-transfer resistance and the distributed voltage on Ti doped V 2 O 5 film is larger in LiClO 4 -Ferrocene electrolyte, which can enhance optical properties of ECD by improving charge density of Ti doped V 2 O 5 film.
研究领域:
材料科学
·
电化学
·
功能材料
·
纳米科技
·
能源技术
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2015
·Vol. 27
·期 4
·3549-3556
·
IF 1.569
Wang Lu,Yang Zhouyong,Ni Xiuyuan
We prepare the mesoporous polythiophene–WO 3 film through in situ polymerization which is initiated by WO 3 , and fabricate the electrochromic device with the composite film. The influences of the electrolyte ions, film morphologies and counter electrode on the electrochromism of the devices are explored by UV–Vis transmittance spectra and cyclic voltammetry tests. With the aim to enhance the contrast optical transmittance, we develop the binary composite electrolytes of LiClO 4 and N(C 4 H 9 ) 4 ClO 4 solution which can promote intercalation/deintercalation process. Besides that, we use polyethylene oxide as pore-forming agent on the polythiophene–WO 3 films, so that it will be easier for electrolyte ions to diffuse in the porous film. A NiO layer also has a complementary effect on the cathodic coloration films and increases the contrast optical transmittance remarkably. Equipped with the binary electrolyte and the NiO layer as the counter electrode, the film device exhibits high performance with the contrast optical transmittance (ΔT) of 62 % and the coloration efficiency of 212.6 cm 2 /C.
研究领域:
材料科学
·
电化学
·
功能材料
·
纳米材料
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能源材料
·
表面科学
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DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Yuming Tan,Bolang Cheng,Xiaocong Tang,Wei Zhao,Yong Zhang
The development of gas sensor chips with high sensitivity is essential for environmental monitoring and disease diagnosis. Traditional strategies for enhancing gas sensor performance, such as heat and light assistance, inevitably influence device integration due to the requirement of auxiliary heating/lighting modules. Herein, a method for adjusting the work function of sensing materials via an electric field is proposed, which allows ppb-level ammonia (NH3) detection and facilitates on-chip integration of gas sensors by eliminating the requirements of heating or irradiation. Based on this mechanism, a carbon-based field-effect transistor (FET) gas sensor with a dual-gate structure is designed, achieving a detection limit of 40 ppb NH3 at 25 °C under an optimized control gate (CG) voltage of −8 V. Through density functional theory (DFT) calculations and electronic structure analysis, we reveal that the sensing mechanism originates from CG’s work function variations induced by electric fields. Differential charge density calculations further indicate that the adsorption site, distance, and molecular polarization of NH3 are regulated by the applied electric field, leading to an optimal response at specific gate voltages. This work reveals the mechanism of the electric field on gas sensor performance, providing a novel and universal strategy for developing high-performance gas sensors compatible with on-chip integration.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Bin Liu,Kaili Chu,Panpan Lan,Cui Zhou,Jialin Li,Qingqiao Fu,Wenxian Li,Luchao Sun,Jingyang Wang
Tungstate, with the molecular formula AWO 4 , has attracted widespread attention due to its outstanding applications in various fields. Ba 1- x Sr x WO 4 ( x = 0, 0.2, 0.4, 0.6, and 0.8) ceramics with a single-phase scheelite structure are synthesized by the conventional solid phase reaction method. Their structural stability, micromorphology, and element distribution, thermal and mechanical properties are systematically investigated. The experimental thermal conductivity of all samples is 0.852–1.056 W·m −1 ·K −1 at 1173.15 K. An outstanding advantage of Ba 1- x Sr x WO 4 ceramics is that the coefficient of thermal expansion increases from 7.71 × 10 −6 K −1 ( x = 0) to 10.31 × 10 −6 K −1 ( x = 0.8) at 1173 K, indicating that the doping of Sr ion reduces the system energy during the lattice relaxation process and significantly improves the coefficient of thermal expansion. The thermal conductivity of Ba 1- x Sr x WO 4 ceramics is significantly lower than that of most low thermal conductivity candidate materials, such as Y 2 SiO 5 , SrZrO 3 , and La 2 Zr 2 O 7 . This study lays a foundation for the design of BaWO 4 scheelites with excellent thermal properties, which have high practical application value in the field of thermoelectric conversion and thermal protection.
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yi Zhou,Zhidong Pan,Yanmin Wang,Youjun Lu,Xiangyu Li,Shanjun Ke
Neodymium tungstate materials (i.e., Nd 2 WO 6 , Nd 2 W 2 O 9 , and Nd 2 (WO 4 ) 3 ) as novel allochroic inorganic pigments were synthesized by a solid-state reaction method. The pigments were characterized by X-ray diffraction, UV–visible–NIR spectrophotometry and colorimetry. The results show that the pigment with a monoclinic phase of Nd 2 (WO 4 ) 3 displays noticeable color changes from purple to blue, and then to gray under varying illuminants with a maximum color difference (Δ E∗ ) of 13.58. A relationship between crystal structure characteristics and allochroic function was investigated, and the corresponding mechanism was analyzed based on the Judd-Ofelt model and the crystal structure of the pigments. It is revealed that a lower symmetry in the Nd 3+ crystal environment and a higher covalency increase the probability of 4 f electronic transitions and illuminant sensitivity, thereby enhancing the allochroic effect.
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产品关联
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2025
·
IF 5.1
Fuhan Mai,Jianguo Deng,Xing Li,Xue Liu,Yingchun Lu,Wanjia Tian,Lanxiang Ji,Xiaofeng Bai
Radiation protection products with excellent radiation shielding properties and wear comfort are essential for individuals working in X-ray environments. Unfortunately, commercially available rubber composites and lead aprons cannot simultaneously meet the requirements for radiation protection safety and wear comfort. Here, a microfiber synthetic leather is proposed to solve this challenge. Hydrothermal synthesis of flower shaped WO 3 and investigation of its growth mechanism. Then, a titanate coupling agent is applied to synergistically modify with sodium carboxymethyl cellulose to construct hydrogen bonds and improve the interfacial compatibility between flower shaped WO 3 and waterborne polyurethane. Next, WO 3 is grown in-situ on microfiber nonwoven fabric by hydrothermal method. Finally, the waterborne polyurethane is coated onto the WO 3 in-situ grown microfiber nonwoven fabric. Monte Carlo simulations demonstrate that multilevel structures increase the probability of X-ray collisions with extranuclear electrons in materials, thereby enhancing X-ray shielding. In-situ growth of WO 3 resulted in an enhancement of the mechanical engagement points between microfiber nonwoven fabric and waterborne polyurethane, thereby improving their interfacial compatibility. The sample exhibits excellent durability. Importantly, the prepared samples exhibit x-ray shielding (55 %–90 %), light weight (0.835 g/cm 3 ), water vapor permeability (372 g/m 2 ·24h), and flexibility. These excellent properties demonstrate its potential for application in radiation protection, and bring broad prospects for the development of new radiation protection products.
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Shan Tang,Jiumei He,Chengcheng Wan,Li Jiang,Qianchun Zhang
This study addresses the urgent demand for simple and sensitive online gas monitoring technologies in the field of environmental safety by developing a high-performance cataluminescence (CTL) sensor based on oxygen-vacancy-rich microporous titanium dioxide (Ovm-TiO 2 ) for detecting trace isobutyraldehyde (IBL). The Ovm-TiO 2 material, synthesized via a two-step heating process combined with a KBH 4 treatment, features abundant oxygen vacancy defects on its surface, which are pivotal to enhancing sensor performance. Density functional theory (DFT) calculations unravel the surface-mediated mechanism, the oxygen vacancies serve as active sites, drastically enhancing the chemical adsorption and activation of O 2 on the Ovm-TiO 2 surface, which is the key to boosting the cataluminescence efficiency. The developed sensor exhibits outstanding detection performance for IBL, with a wide linear range (0.0100–5.00 mg/L, R 2 = 0.9997), a low detection limit (3 μg/L), and achieved recovery rates of 87.6%–107% with good reproducibility (relative standard deviation, RSD: 5.3%–9.0%) in practical sample analysis. This work not only provides a viable online monitoring solution for IBL but also elucidates the CTL enhancement mechanism at the atomic level, offering important theoretical foundations and practical insights for designing highly sensitive gas sensors.
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产品关联
DOI
高影响因子
Nature Communications
·
2026
·
IF 18.1
Zhang Liangshutong,Zhang Yupu,Li Xinyu,Han Donghao,Xu Shuchang,Zhai Wei,Wang Jianyuan
The flexibility and intelligent responsiveness of hydrogel robots offer great potential for exploration in narrow and complex environments. However, the integration of sensors with hydrogel robotic bodies remains challenging. Inspired by marine organisms, this paper presents an anemone-like light-driven hydrogel robot (ALHR) for directional infrared radiation detection. We fabricated via ultrasonic-assisted stacking a black phosphorus/tungsten disulfide (BP/WS 2 ) moiré superlattice, showing high dual-mode photothermal-photovoltaic conversion performance. Based on this, a composite poly(N-isopropylacrylamide) (PNIPAM) hydrogel was used to build the base plate and tentacle structures of the ALHR. Specific illumination was found to trigger the photothermal effect of the BP/WS 2 moiré superlattice, allowing for directional movement. When the tentacles retract and contact the bottom electrode, photocurrent signals are conducted for infrared detection. The ALHR can work in specialized spatial environments, providing a promising method for early overheating fault identification in equipment. This study proposes a universal design framework for multifunctional hydrogel robots by integrating responsive units with driving units to leverage the synergistic effects of multiple materials.
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产品关联
DOI
PubMed
高影响因子
NUCLEAR TECHNOLOGY
·
2026
·
IF 1.7
Shuaida Song,Jie Zhao,Xiangjie Duan,Na Zhou,Jizhuang Fan,Bo Tian,Yunchen Du
Polymer-based composites are receiving more and more attention in the field of radiation shielding due to their good recyclability and processability; however, the poor compatibility between the organic polymer matrices and inorganic fillers usually appears as a bottleneck to their full shielding effectiveness. Although compatibilizers are widely utilized to suppress the agglomeration of inorganic fillers, their impact on the overall performance of composites is less concerning.In this study, we systematically investigate the effects of three common compatibilizers, i.e. 3-aminopropyltriethoxysilane (KH550), 3-methacryloxypropyltrimethoxysilane (AM), and maleic anhydride–grafted polypropylene (PP-g-MAH), on the properties of WO3/PP composites, including rheological performance, thermal properties, crystallization behaviors, mechanical properties, and radiation shielding effectiveness.It was found that in addition to dispersing WO3 particles, KH550 and AM contribute to the formation of a heterogeneous network structure in the PP matrix, and especially for KH550, it can effectively promote the structural stability, thermal stability, crystallinity, and toughness of WO3/PP composites. More importantly, WO3/PP-S-K exhibits the best shielding performance, with linear attenuation coefficients of 3.71 cm−1 and 0.279 cm−1 under 241Am (59.6 keV) and 60Co (1332 keV) irradiation, respectively. Compared with the pristine WO3/PP composite, the half-value layer is markedly reduced to 0.187 cm and 2.48 cm, representing decreases of 25.5% and 60.6%.These findings underscore the enhancements in shielding performance and structural integrity achieved through modification with KH550, thereby providing valuable insights for the future development of environmentally friendly radiation shielding materials.
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DOI
高影响因子
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