Catalysts
·
2021
·Vol. 11
·期 4
·445
·
IF 4.146
Yangyang Guo,Xiaofei Xu,Hong Gao,Yang Zheng,Lei Luo,Tingyu Zhu
Ca poisoning behavior is inevitable for high-calcium content flue gas, so V2O5-WO3/TiO2(VWT) and V2O5-WO3-CeO2/TiO2(VWCeT) catalysts with different vanadium content have been prepared and the Ca-doped catalysts are compared in this manuscript. The result shows Ce addition can both promote the NO conversion and the alkali resistance. Lower Ca addition for 0.1VWCeT catalyst promotes its oxidability and Ce modification is more suitable for low vanadium catalysts. The total acidity and the reducibility of catalysts decline after Ca doping, and the reducibility of the active species on catalysts has been strengthened by Ce addition. CeO2based catalysts with lower Ca loading struggle to resist sulfur poisoning, while higher Ca loading favors SO2adsorption and also physically reduces the cerium acidification process. In the presence of SO2, additional Brønsted acid sites are formed in Ca rich catalyst. The dynamic NH3adsorption has been investigated, shows that Ca doping content on catalyst is critical for SCR reaction, and the catalyst is more susceptible to SO2initially in alkali flue gas during the actual application, but the sulfur resistance may increase with the alkali-poisoning effect aggravated by Ca doping.Keywords:Ca-poisoning;SCR reaction;NO reduction;V2O5-WO3/TiO2and V2O5-WO3-CeO2/TiO2catalysts;SO2and water;NO removal efficiency
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Xide Chang,Xu Dong,Xianhua Liu,Yindong Tong,Kaixiang Li,Zhenguo Li,Yiren Lu
Mixed-phase composites with an optimal phase ratio show greater light utilization than their monophasic counterparts. This approach can be applied to develop mixed-phase photochromic tungsten oxide (WO 3 ), which shows a rapid photoresponse and high-contrast coloring. Therefore, this paper optimized the phase ratio of hexagonal WO 3 ( h -WO 3 ·0.33H 2 O) and orthorhombic WO 3 ·H 2 O ( o -WO 3 ·H 2 O) to form a homojunction. To enhance its photochromism, nanostructured WO 3 was produced via a one-step hydrothermal strategy, in which its phase structure and morphology were controlled by regulating the reaction temperature during precursor synthesis. Various material characterization techniques were carried out to reveal the complex crystal nucleation and growth of phase junctions. h -WO 3 ·0.33H 2 O nanoparticles dominated the systems, while o -WO 3 ·H 2 O nanoblocks also appeared from 41.77 wt% to 56.50 wt% at a low hydrothermal synthesis temperature, producing a mixture of both polymorphs. The improved photochromic properties (from light yellow to black-green) of the mixed-phase WO 3 composite compared with pure h -WO 3 ·0.33H 2 O (from gray-white to dark gray) was attributed to the formation of a phase junction between h -WO 3 ·0.33H 2 O and o -WO 3 ·H 2 O. The photoelectrochemical results showed that this resulted in highly efficient charge carrier separation and transfer. The strong visual rendering of the black-green state may be useful for developing intelligent displays and similar devices.
研究领域:
材料科学
·
化学工程
·
光电材料
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2016
·Vol. 40
·期 4
·3225-3232
·
IF 3.277
Han Zheng,Changhua Wang,Xintong Zhang,Lina Kong,Yingying Li,Yunyu Liu,Yichun Liu
Multi-heterojunctions are more promising than single-heterojunctions in photocatalysis due to the availability of more interfaces between each component. However, photocatalytic activity is highly dependent on the contact mode of individual components. In this work, we assemble TiO2–WO3–Pt multi-heterojunction microspheres using ultrasonic spray pyrolysis and focus on their contact mode governed photocatalytic activity. The results reveal that using highly crystalline WO3 nanosheets as building blocks could particularly enhance the photocatalytic activity of a TiO2/WO3 system toward the degradation of gaseous acetaldehyde and isopropyl alcohol. Furthermore, loading Pt nanoparticles onto WO3 nanosheets could facilitate a more prominent enhancement of activity than that of TiO2/Pt, benefiting from the two-electron reduction of oxygen at the interface of WO3/Pt. Meanwhile, the high crystallinity of WO3 nanosheets allows for a loading amount of Pt as low as 0.04 wt% in the TiO2–WO3–Pt system, which reduces the catalyst cost in comparison with that of the conventional amount of 1 wt%.
研究领域:
材料科学
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环境科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2019
·Vol. 30
·期 25
·255703
·
IF 3.399
Ning Li,Xun Cao,Tianci Chang,Shiwei Long,Ping Jin
Pursuing excellent photochromic (PC) properties is still a longstanding challenge for energy-efficient smart coatings. Herein, we have prepared a novel series of self-coated crystalline WO3-amorphous WO3−x homojunctions by a one-step hydrothermal process, in which oxalic acid was used as a capping agent to prevent polycondensation and the crystallization of [WO6]. The as-prepared nanopowders with tight interfaces have a large specific surface area and rich surface electrons, which leads to a dramatic PC property reaching up to ΔTsol = 64.74% at the near-infrared (NIR) range of 1000–2600 nm with high luminous transmittance (Tlum = 94.6% in the virgin state and Tlum = 32.47% in the colored state). Meanwhile, the as-prepared crystalline WO3-amorphous WO3−x homojunction reveals fast reversible PC circulation; most particularly, the self-bleaching rate increases at least three times—the self-bleaching time is less than 8 h. Moreover, as the microstructure of the homojunction is tuned, the solar modulation range can be selective and tuned, so that the solar modulation efficiency is up to the best energy-saving state by controlling the main absorption according to the solar energy distribution.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 43
·20210-20223
·
IF 4.682
Wang Ruo-tian,Xiong Sang
Nano-WO 3 :EU 3+ powder was prepared by Pechini method under acidic and alkaline condition, and the prepared acidic nano-WO 3 :Eu 3+ mixed with the silver nanowires (AgNWs) in ethanol and acetone solution. The solution was mixed with PMMA and EP, respectively. Then, drops of the solutions were added to the indium tin oxide (ITO) conductive glass as the substrate; a AgNWs/WO 3 :Eu 3+ composite film was obtained with spin coating by spin coater and solidification process. Microstructure, morphology, optical properties, preparation process and UV transmittance of the prepared nano-WO 3 :Eu 3+ and AgNWs/WO 3 :Eu 3+ composite films were investigated by XRD, SEM, fluorescence spectroscopy and UV spectrophotometer. The results show that the prepared acidic nano-WO 3 is triclinic, and the average particle size is 71.63 nm. The prepared alkaline nano-WO 3 is monoclinic, with an average particle size of 95.66 nm. Both of them have good luminescence properties. Under different monitoring wavelengths, in the emission range of 450–500 nm, it belongs to the green light region, and its excitation peak is the largest, indicating that green light is the best excitation light source for WO 3 :Eu 3+ powder. The transmittance of EP/AgNWs/WO 3 :Eu 3+ composite film is the highest when the spin coating time is more than 30 s and above 3000 rpm, no more than three layers spin coating and the content of curing agent is between 0.1 and 0.2 g.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 36
·29925-29936
·
IF 4.6
Zhenwei Yan,Zihao Wei,Zhaojun Tan,Shuaihui Guo,Zhipeng Fang,Wen Wang,Gang Li,Xianjie Yuan,Mingqi Tang,Zaiqiang Feng
The oxygen evolution reaction (OER) is hindered by the sluggish kinetics, high costs, and poor stability of noble metal catalysts (e.g., RuO2), as well as low atomic utilization and limited accessibility of active sites in transition metal oxide catalysts. To address these challenges, this study develops a core–shell structured WO3@Co-CoPBA heterostructure as an efficient OER electrocatalyst. Co-CoPBA nanocubes are hydrothermally synthesized and then loaded with WO3 nanorods, followed by gradient annealing under N2 atmosphere (optimized at 500 °C) to form a Co3O4@WO3 heterojunction. Characterization and electrochemical evaluations reveal that annealing at 500 °C induces topological reconstruction of Co-CoPBA into porous Co3O4 and graphene cores, Co sites in Co3O4 serve as the catalytic active centers, forming a strong electronic coupling interface with the WO3 shell. This architecture significantly enhances the density of active sites (electrochemically active surface area of 3.8 cm2) and charge transfer efficiency (Tafel slope of 55.12 mV dec−1). The catalyst delivers an overpotential of 315 mV at 100 mA cm−2 in 1 M KOH, outperforming commercial benchmark catalyst RuO2 (372 mV). It exhibits exceptional stability with almost no performance decay after 100 h. Density functional theory (DFT) calculations demonstrate that interfacial electronic restructuring modulates the d-band center, optimizing the adsorption Gibbs free energy of OOH* intermediates and thereby improving intrinsic catalytic activity. This work provides an effective interface engineering strategy for designing high-performance, low-cost transition metal-based electrocatalysts.
研究领域:
电化学
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材料科学
·
催化
·
纳米技术
·
能量转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Peicheng Wei,Yan Wen,Kaifeng Lin,Xin Li
Developing novel photoanodes with high efficiency for photoelectrochemical (PEC) water splitting has become the key to solar energy conversion and storage realm. Herein, 3D worm-like bismuth vanadate (BiVO 4 ) is grafted on 2D thin tungsten trioxide (WO 3 ) underlayer by electrodeposition to form mixed–dimensional structured photoanode, resulting in significant improvement of the photocatalytic performance and the charge separation efficiency. Characterization results prove that the mixed–dimensional structured can boost the photocatalytic activity by suppressing back reaction and charge recombination of the bulk BiVO 4 . Simultaneously, the electrical conductivity of photoanode can be increased by W 6+ doping. Furthermore, a robust catalyst NiCo 2 O x is coated onto the surface of WO 3 /BiVO 4 photoanode, exhibiting a desirable photocurrent of 3.85 mA cm −2 at 1.23 V vs . RHE and an excellent stability over 3 h. Both the excellent photocurrent density and great operational stability of this 2D/3D WO 3 /BiVO 4 photoanode make it a promising material for practical applications.
研究领域:
材料科学
·
能源转换与存储
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2022
·
IF 7.305
Yong Zhu,Yongji Yao,Zhang Chen,Zongtao Zhang,Pan Zhang,Zefeng Cheng,Yanfeng Gao
Tungsten oxide (WO 3 ) photochromic film for smart windows faces many challenges, including slight discoloration, and slow and irreversible photochromic response. We propose a WO 3 quantum dots (WQDs) to resolve the above problems, and WQDs-polyvinyl alcohol (PVA) transparent film by casting method exhibits quick response to ultraviolet light (<60 s), and large optical modulation (>90%) between bleached and colored states , although the bleaching time is still long (8 h). Meanwhile, the PVA/WQDs composite film is self-supported and exhibits excellent tensile properties . The actual cooling effect of the photochromic glass was tested using a model house and the annual energy consumption was simulated by using EnergyPlus software. For a warm city (Haikou), using this photochromic glass can reduce electrical consumption for cooling by 27.3%.
研究领域:
材料科学
·
能源与环境科学
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2025
·Vol. 15
·期 9
·859
·
IF 4
Wanru Yan,Jiating Li,Nan Ma,Zemin An,Yuanjie Xu,Lizhi Wu,Li Tan,Yu Tang
As a model compound for lignin derivatives, anisole and its conversion are crucial for the upgrading of biomass resources. Anisole molecule contains a characteristic aryl ether bond (Caryl-O-CH3); therefore, the selective cleavage of the C-O bond to efficiently produce high-value chemicals poses a significant challenge. Constructing bimetallic synergistic active sites through tuning the metal-support interface is considered an effective strategy. In this work, the WO3-promoted Pt/SiO2catalysts were investigated to enhance the performance of anisole hydrodeoxygenation (HDO) to hydrocarbons. Experimental results demonstrate that WO3significantly promotes HDO selectivity, increasing from 37.8% to 86.8% at 250 °C. Moreover, moderate doping improves low-temperature (<250 °C) HDO activity, confirming the presence of synergistic effects. In contrast, excessive WO3suppresses anisole conversion. Characterization results reveal that WO3stabilizes metallic Pt and facilitates H2dissociation. Concurrently, strong hydrogen spillover between Pt and WO3promotes oxygen vacancy formation on WO3. This transforms disordered adsorption of anisole on SiO2into directed adsorption of the anisole’s oxygen species onto WO3. This work achieves high anisole HDO selectivity through the Pt-WO3interface tuning, offering novel insights for efficient lignin conversion.
研究领域:
催化化学
·
生物质转化
·
多相催化
·
可持续能源
·
材料化学
✓ 已验证
产品关联
DOI
高影响因子
ChemElectroChem
·
2017
·Vol. 5
·期 2
·322-327
·
IF 4.136
Kai Song,Fengmei Gao,Weiyou Yang,Enyan Wang,Zhenxia Wang,Huilin Hou
Graphical Time to split : The efficient photoelectrocatalysis of WO 3 mesoporous nanobelts is explored, demonstrating enhanced photoelectrochemical activity for water splitting. In the present work, we reported the exploration of photoanodes based on mesoporous WO 3 nanobelts through a foaming-assisted electrospinning strategy. The introduced polyvinylpyrrolidone in the raw solutions played a determining role on the formation of the nanobelts, enabling their fabrication in a controlled manner. The as-fabricated mesoporous WO 3 nanobelts exhibited a photocurrent density of 311 μA cm −2 and incident photon-to-current efficiency of 6.5 % at 350 nm and 1.2 V vs. Ag/AgCl under simulated sunlight illumination, which are 2.3 times to that of cylindrical nanofibers. Furthermore, our discovery confirmed that, in comparison to the conventionally cylindrical nanofibers, the nanobelts with a rectangular cross section could be a better candidate for constructing photoanodes with enhanced photoelectrochemical efficiency and stability.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Dexi Yu,Yuhong Lin,Wenhui Zhou,Xiaoyi Wang,Zhenzhen Yu,Yidong Hou,Masakazu Anpo,Jimmy C. Yu,Jinshui Zhang,Xinchen Wang
Photocatalytic oxidation of benzene to phenol using molecular O2 is one of the most promising sustainable approaches for the green synthesis of phenol. Introducing oxygen vacancies (OVs) on semiconductor surfaces by defect engineering is a promising strategy to enhance the efficiency of benzene oxidation to produce phenol due to the unique functions of OVs in facilitating the charge separation and activation of molecular O2. Herein, a vacuum-sealed annealing strategy has been well developed to generate abundant surface OVs on semiconductors, such as WO3. The well-sealed quartz vial creates a well-controlled low-pressure condition for the formation of OVs without the need for external energy for maintaining the vacuum state. Moreover, the gaseous species generated during the thermal annealing process help mitigate stress-induced defects, particularly bulk defects. The vacuum-sealed annealed WO3 with sufficient OVs and reduced bulk defects shows a better photocatalytic performance in the one-step oxidation of benzene to phenol with O2, compared to the WO3 synthesized through thermal annealing in Ar and H2 atmospheres. The present vacuum-sealed annealing strategy is found to be further applicable to engineer a wide range of semiconducting photocatalysts with abundant OVs to optimize their properties for efficient photocatalysis and other OV-promoted systems.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysts
·
2024
·Vol. 14
·期 11
·774
·
IF 3.8
Ziyang Li,Chunjie Wu,Chenhao Zhang,Hui Li
The selective hydrogenolysis of glycerol to 1,3-Propanediol (1,3-PDO) presents a sustainable approach, leveraging a bio-renewable feedstock and significantly enhancing the economic viability of biodiesel production. However, the limited selectivity toward 1,3-PDO in glycerol hydrogenolysis has hindered its widespread adoption on an industrial scale. In this work, we synthesized a series of Pt/WO3–Al2O3catalysts using a simple wetness sequential impregnation method. Comprehensive characterization and kinetic studies revealed that the surface tungsten content of the catalyst exerted a critical and multifaceted influence on the catalytic performances. Under optimal conditions, glycerol could be selectively converted to 1,3-PDO with a yield of 43% in a fixed-bed continuous flow reactor. Furthermore, a plausible reaction mechanism for glycerol hydrogenolysis was proposed based on the correlations between catalyst structure and catalytic performance.
研究领域:
催化化学
·
可再生资源化学
·
绿色化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）