APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Guojuan Hai,Jianfeng Huang,Liyun Cao,Koji Kajiyoshi,Long Wang,Liangliang Feng
Designing and synthesizing heterojunction electrocatalyst with abundant active sites is critical to optimize the activity of electrochemical water splitting. Herein, a typical hierarchical W 18 O 49 /NiWO 4 heterojunction grown on nickel foam was successfully synthesized via a multistep synthesis strategy. The electrochemical oxidation and reduction process triggers the amorphization of W 18 O 49 and significantly enhances the interfacial interaction, thereby endowing the composites with enriched active sites. The W 18 O 49 /NiWO 4 /NF is completely reconstructed to NiWO 4 /NF and NiWO 4 /NiOOH/NF with amorphous-crystalline interface (denoted as H-AM/NiWO 4 /NF for HER and O-AM/NiWO 4 /NiOOH/NF for OER). The valence of tungsten ions is well modulated to achieve a high proportion of tetravalent W (IV) active sites accompanied by abundant oxygen vacancies. The increased Ni (III) ions as OER active sites have strong orbital overlap with reaction intermediate, which stabilize the low-valent W (IV) by producing more NiOOH species during the oxygen evolution reaction. Benefiting from the amorphous–crystalline composites, unsaturated W (IV) sites, abundant oxygen vacancies, and highly active NiOOH species, the activated electrocatalyst exhibits excellent electrocatalytic activity, achieving a small overpotential of 1.53 V at 10 mA·cm −2 for water-splitting and maintaining long-term stability at least 100 h.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Xuesong Cai,Xiudi Xiao,Guizhang Sheng,Jieyuan Zheng,Yajie Zhao,Gang Xu
In wet-chemistry processes, pH value is an important parameter that can be used to control the microstructures of the as-grown nanostructures . In this work, W 18 O 49 nanowires with crystalline@amorphous core-shell structures were synthesized by controlling the pH of the precursor solutions in a hydrothermal reaction . Due to surface functionalization by ethylene glycol (EG) groups, the hydrothermally grown W 18 O 49 nanowires could be easily dispersed in aqueous environment, thus enabling the fabrication of electrochromic thin films of W 18 O 49 nanowires by a simple spray-drying process. The optimized W 18 O 49 nanowire films showed a large optical modulation (ΔT) of 81.1% at 633 nm, short response time (coloring/bleaching time τ c /τ b = 7.9 s/3.9 s), good cycle stability (ΔT retention was 84.5% after 1000 cycles), and the excellent memory effect (the color withstood for 36000s after turning off the voltage). Furthermore, the electrochromic device (ECD) (4 × 4 cm 2 ) based on the W 18 O 49 nanowires exhibits a large optical modulation of 56.6%, short response time (τ c = 7.6 s, τ b = 2.7 s), and superior coloration efficiency (CE) of 64 cm 2 C −1 . Finally, by simply amplifying the developed processes, a large-area electrochromic device (10 × 10 cm 2 ) was successfully prepared, which implies the possibility of large-area spraying process for practical applications.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2021
·
IF 9.676
Guojuan Hai,Jianfeng Huang,Liyun Cao,Koji Kajiyoshi,Long Wang,Liangliang Feng,Jun Chen
The electrochemical conversion is closely correlated with the electrocatalytic activities of the electrocatalyst. Herein, the urchin-like Ni-doped W 18 O 49 /NF with enriched active sites was prepared by solvothermal method followed by a low-temperature pyrolysis treatment was reported. Results demonstrate that the incorporation of Ni-doping triggers the lattice distortion of W 18 O 49 for the increasement of oxygen defects. Further, high-valent W 6+ are partially reduced to low-valent W 4+ , wherein the electrons originate from the oxidation process of Ni 2+ to Ni 3+ . The Ni 3+ ions show an enhanced orbital overlap with the OER reaction intermediates. The generated W 4+ ions contribute to release oxygen vacancies, eventually reorganizing Ni-doped W 18 O 49 /NF to unique electrochemical active species with a special amorphous-crystalline interface (AM/NiWO x /NiOOH/NF). Simultaneously, the reconstruction results in an optimized valence band and conduction band. Eventually, the resultant AM/NiWO x /NiOOH/NF with abundant active sites and improved oxidation/reduction capability exhibits more superior catalytic performance compared with the Ni-doped W 18 O 49 /NF counterpart. This study gives more insights in the electrochemical evolution of the tungsten-based oxide and provides effective strategies for optimizing the catalytic activity of materials with inherent hydrogen evolution reaction limitations.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2025
·
IF 4.7
Xinyue Peng,Mai Zhang,Xue Zhang,Cong Luo,Xiaolei Hu,Jianjun Liao,Cheng Li,Linlin Zhang
Dual defects can synergistically react with molecules in space and time, thereby facilitating the activity and directional selectivity of photocatalytic reactions. The W 18 O 49 /BiOCl heterojunction photocatalyst with double oxygen vacancies was fabricated via a straightforward hydrothermal approach. The objective was to attain highly effective CO 2 reduction and the selective oxidation of toluene. The existence of a firmly bonded contact interface and oxygen vacancies in the W 18 O 49 /BiOCl heterojunction has been demonstrated to effectively promote the rapid separation and transportation of photogenerated electron holes. Upon exposure to visible light, the W 18 O 49 /BiOCl heterojunction exhibits excellent CO 2 reduction ability, reducing CO 2 to CO (87.4 μmol g −1 h −1 ), and efficiently oxidizing toluene to benzaldehyde (1582.3 μmol g −1 h −1 ), with a selectivity of about 86%. This research can offer guidance for the rational design of highly efficient bifunctional catalysts that combine the reduction of CO 2 with selective organic conversion.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
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IF 12.5
Jie Xiong,Shuo Wu,Bing Sun,Yiding Zhang,Botao Zhu,Lai Feng
W 18 O 49 with separately dispersed Ni sites was prepared as the electrocatalyst for electro-oxidation reaction of 5-hydroxymethylfurfural (HMFOR). • Ni 0.33 &W 18 O 49 promotes efficient HMFOR to 2,5-furandicarboxylic acid (FDCA) with a high yield rate (YR FDCA ) of ⁓3.37 mmol cm -2 h -1 . • Experimental and computational results reveal an indirect pathway for HMFOR, where the in-situ formed NiO(OH) acts as the proton acceptor. • A nickel foam‖Ni 0.33 &W 18 O 49 pair enables continuous production of FDCA with a high YR FDCA of ca. 0.279 g cm -2 h -1 . The electro-oxidation reaction of 5-hydroxymethylfurfural (HMFOR) provides an ideal solution for addressing the sustainable production of 2,5-furandicarboxylic acid (FDCA), a critical precursor for biodegradable polymer synthesis. However, HMFOR over non-precious catalysts may suffer from low current density and hence insufficient FDCA yield rate (YR FDCA ). In this work, a series of W 18 O 49 nanostructures with interstitially doped Ni 2+ sites (Ni x &W 18 O 49 ) are employed as the model catalyst for HMFOR. Among them, the optimal candidate Ni 0.33 &W 18 O 49 exhibits a superior performance in terms of an impressive YR FDCA of 2.88 mmol cm −2 h −1 and good durability, outperforming that of α-Ni(OH) 2 with continuously dispersed Ni-(μ 2 -OH)-Ni species. Experimental and theoretical studies reveal that the Ni&W 18 O 49 with an isolated Ni 2+ site follows an indirect pathway, where the in-situ formed NiO(OH) serves as a proton acceptor during HMFOR. It also surpasses α -Ni(OH) 2 in terms of remarkably reduced reaction barrier. Finally, an electrode pair of NF‖Ni 0.33 &W 18 O 49 is constructed to enable continuous productions of H 2 and FDCA with a high YR FDCA of 1.79 mmol cm −2 h −1 in a flowing single cell. This work thus provides fundamental insights into the design of Ni-based catalysts for highly efficient electro-oxidation of HMF to FDCA.
✓ 已验证
DOI
高影响因子
CARBON
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2018
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IF 7.082
Changchao Jia,Xiao Zhang,Katarzyna Matras-Postolek,Baibiao Huang,Ping Yang
Z-scheme reduced graphene oxide (rGO)/TiO 2 -bronze (TiO 2 -B)/W 18 O 49 photocatalyst consisted of rGO, super-thin TiO 2 -B nanosheets , and W 18 O 49 nanofibers was fabricated by a two-step solvothermal synthesis route. The TiO 2 -B nanosheets were tightly attached on rGO firstly. W 18 O 49 nanowires were then grown on rGO/TiO 2 -B. Precursors and reaction conditions play important roles for getting the optimal microstructure. The ternary photocatalyst is able to absorb sunlight ranging from ultraviolet to near infrared regions , which makes full use of light for efficiently photocatalytic degrading organic pollutants. The light absorption intensity and photon-generated carrier transfer efficiency are both improved with adding rGO. The localized surface plasmon resonance effect arose from the nonstoichiometric W 18 O 49 is in favour of the absorption range of the rGO/TiO 2 -B/W 18 O 49 composite broadening to near infrared light range. The photocatalytic mechanism of Z-scheme rGO/TiO 2 -B/W 18 O 49 composite was verified by an electron spin resonance test. The conduction band of TiO 2 -B and the valence band of W 18 O 49 are used in the photocatalytic degradation of rhodamine B, facilitating the efficient separation of photogenerated carriers . The rGO/TiO 2 -B/W 18 O 49 heterostructure exhibits an excellent photocatalytic performance under full solar-spectrum irradiation. The result may represent a new strategy for the construction of nanocomposites with suitable band structure in the efficient application of full solar light.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2025
·
IF 6.9
Lirong Chen,Liuwen Zhong,Xiaoli Chen,Yanqing Zhu,Rui Ge,Chengyu Jiang,Gang Xu,Xiudi Xiao
Whether to achieve multicolor changes in visible band alone or dynamically tunable infrared emissivity alone, electrochromism has shown strong potential to meet the camouflage requirements of their respective bands. However, a combination of camouflage requirements operating in multi-band raises challenges to the electrochromic (EC) devices that initially performed well in a single band, due to “catching one and losing another”. In this paper, dynamic multi-band camouflage is demonstrated with multicolor change and tunable infrared emissivity by the reflective EC device using the carbon nanotubes and tungsten oxide nanowires (CNT-W 18 O 49 NWs) film as the top working electrode. The devices show eight brilliant structural colors sufficient to simulate a variety of scenes in nature, especially yellow, yellow-green, and blue-green colors, which are enough to meet the military equipment needs to adapt to the natural environment, including deserts, Gobi, jungles, and oceans; meanwhile, the infrared emissivity modulation of 0.52 also realizes the excellent infrared camouflage potential while demonstrating the thermal management capability of 13.4 °C. This work provides an efficient and cost-effective pathway for conventional EC materials in multi-band camouflage.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Catalysis
·
2023
·
IF 12.9
Xu Yu,Han Tian,Zhengqian Fu,Fenglai Pei,Lingxin Peng,Ge Meng,Fantao Kong,Yafeng Chen,Chang Chen,Ziwei Chang,Xiangzhi Cui,Jianlin Shi
The hydrogen spillover effect on metal-supported electrocatalysts is of great significance in hydrogen-involved reactions, especially in a hydrogen oxidation reaction (HOR). Herein, a facile thermal reduction method has been adopted to synthesize W18O49 (WO2.72) nanospheres decorated with single nickel atoms, and the obtained Ni-WO2.72-T (1.20 wt % Ni) was used as a probe catalyst for investigating the hydrogen spillover effect, which exhibits enhanced HOR performance, stability, and resistance to CO poisoning in acidic electrolytes. Based on in situ Raman spectroscopy and the density functional theory (DFT) calculation, a synergistic effect between Ni single-atom active sites and the hydrogen spillover effect is proposed to contribute to the HOR performance on Ni-WO2.72-T. Briefly, the introduction of single Ni atoms induces electron redistribution on Ni-WO2.72-T, making Ni atoms positively charged for H2 adsorption and activation, and on the other hand, the reversible phase transformation between WO2.72 and HxWO2.72 facilitates H* transfer from Ni to WO2.72, i.e., hydrogen spillover, resulting in elevating the HOR catalytic activity. Both experimentation and theoretical calculations demonstrate that the reversible phase transformation of the WO2.72 substrate strengthens the hydrogen spillover effect and thus elevates the HOR catalytic performance, which is believed to be helpful in designing highly active catalysts for hydrogen-involving reactions.
研究领域:
电化学
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催化材料
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理论计算
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Yanting Dou,Yu Gao,Deng Gu,Jiqi Zheng,Bo Zhang,XiuXin Li,Meijia He,Qinglong Zou,Tiaoli Liao,Fu Ding,Yaguang Sun,Zhenhe Xu
Developing a photocatalyst that can effectively utilize the full solar spectrum remains a high-priority objective in the ongoing pursuit of efficient light-to-chemical energy conversion. Herein, the ternary nanocomposite g-C3N4/RGO/W18O49 (CN/RGO/WO) was constructed and characterized by a variety of techniques. Remarkably, under the excitation of photon energies ranging from the ultraviolet (UV) to the near-infrared (NIR) region, the photocatalytic performance of the CN/RGO/WO nanocomposite exhibited a significant enhancement compared with single component g-C3N4 or W18O49 nanosheets for the degradation of methyl orange (MO). The MO photodegradation rate of the optimal CN/1.0 wt% RGO/45.0 wt% WO catalyst reached 0.816 and 0.027 min–1 under UV and visible light excitation, respectively. Even under low-energy NIR light, which is not sufficient to excite g-C3N4, the MO degradation rate can still reach 0.0367 h–1, exhibiting a significant enhancement than pure W18O49. The outstanding MO removal rate and stability were demonstrated by CN/RGO/WO nanocomposites, which arise from the synergistic effect of localized surface plasmon resonance effect induced by W18O49 under vis–NIR excitation and the Z-scheme nanoheterojunction of W18O49 and g-C3N4. In this work, we have exploited the great potential of integrating nonmetallic plasmonic nanomaterials and good conductor RGO to construct high-performance g-C3N4-based full-solar spectral broadband photocatalysts.
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Lu Liu,Yajie Chen,Jiajia Zhang,Fanze Zeng,Jinyu Bao,Wenpeng Li,Guohui Tian
The rational construction of heterojunctions with surface defects and localized surface plasmon resonance (LSPR) effect is a promising strategy for improving CO 2 photoreduction performance. Herein, the one-dimensional/two-dimensional (1D/2D) S-scheme heterostructures integrated with non-stoichiometric 1D W 18 O 49 nanowires (H-W 18 O 49 NWs) and 2D ultrathin MIL-125(Ti) nanosheets (MIL-125(Ti) NSs) were constructed by self-assembly for photocatalytic CO 2 reduction. In situ X-ray photoelectron spectroscopy (XPS), electron spin resonance spectra (ESR), and photoluminescence (PL) spectroscopy characterizations confirm the construction of S-scheme heterojunction and the solid internal electric field at the heterointerface enables effective spatial charge separation while keeping a strong redox capability. The hot electrons generated from the LSPR effect of visible-near-infrared light-excited H-W 18 O 49 NWs can be injected into MIL-125(Ti) NSs to increase the electron density and accelerate the reaction rate. Thus, the optimized H-W 18 O 49 NW/MIL-125(Ti) NS heterostructure exhibited good performance, achieving a CO yield of 202.37 μmol g -1 h −1 . This study enriches the diversity and architecture of available heterostructures for photocatalytic applications.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Huiwen Shi,Yanyan Yang,Bo Fu,Yingying Song,Fengru Li,Yongqi Yang,Hua Jin,Xiaoshu Qu
As a tungsten oxide with a unique stoichiometric ratio, W 18 O 49 exhibits localized surface plasmon resonance (LSPR) effects that significantly enhance its electrochromic (EC) properties; however, the modulation mechanism of this enhancement remains underexplored. In this study, we use Keggin-type H 3 PW 12 O 40 (PW 12 ) and W 18 O 49 to successfully fabricate a film (W 18 O 49 /PW 12 ) with high transmittance via the Layer-by-Layer (LbL) method. The films exhibit coloration efficiencies of 91.65 and 156.58 cm 2 /C at 650 and 1100 nm, respectively, and a specific capacitance of 14.34 mF/cm 2 . Although the EC performance of PW 12 is negligible, its multi-electron structure and interactions with W 18 O 49 increase the concentration of oxygen vacancies in the W 18 O 49 /PW 12 film, thereby enhancing the LSPR effect. The bandgap of the W 18 O 49 /PW 12 film decreases, resulting in superior EC ability and energy storage activity, while achieving a thermal blocking efficiency of 54.94 %. The W 18 O 49 /PW 12 film combined with NiO is assembled into electrochromic devices (ECDs) that achieve a thermal blocking efficiency of 79.12 % at −2.3 V. This study is pivotal for elucidating the mechanism by which polyoxometalates regulate the LSPR effect of W 18 O 49 and offers new insights into the development of multifunctional ECDs that integrate light and thermal modulation, as well as energy storage.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Healthcare Materials
·
2025
·
IF 9.6
Chaofan Yao,Yu Zhao,You Wu,Haoming Wang,Hongbin Li,Jinmei He,Li Liu,Yudong Huang,Feng Cheng
Bacterial infections remain a critical challenge in wound care, demanding advanced multifunctional materials for effective treatment. Here, this work presents a 3D-printable hydrogel (STFWA) integrating a Schottky heterojunction and dual-network architecture for synergistic photothermal and photodynamic antibacterial therapy. The hydrogel incorporates W18O49-x@Au nanostructures, where Au nanoparticles are in situ grown on oxygen-deficient W18O49-x (bandgap ≈1.5 eV), forming a Schottky junction that enhances carrier separation and reactive oxygen species (ROS) generation. The dual-network matrix, composed of silk fibroin and tannic acid-Fe3+ (TA/Fe3+), exhibits robust mechanical integrity and hemostatic capability, while silk fibroin enables high-resolution digital light processing (DLP) 3D printing. The co-existence of W18O49-x and Au induces dual localized surface plasmon resonance (LSPR), while TA/Fe3+ contributes to deep coloration, collectively boosting photothermal conversion. Upon near-infrared (NIR) irradiation, the hydrogel exhibits potent antibacterial efficacy against Staphylococcus aureus and Escherichia coli through combined photothermal and photodynamic mechanisms. In vivo studies using a rat model of infected wounds demonstrate accelerated healing, enhanced angiogenesis, and regulated inflammation. This work highlights a nanostructure-enabled hydrogel platform for NIR-activated, synergistic antibacterial therapy with clinical potential in infected wound management.
研究领域:
生物材料
·
纳米医学
·
伤口修复
·
光疗
·
抗菌材料
·
水凝胶工程
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3D打印
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）