SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xiaoyan Li,Rui Zhao,Hongfang Li,Jing Jiang,Lunhong Ai,Xuejuan Cao,Juanli Liu,Hanjun Zou,Youyu Duan
Suffering from inefficient separation and transfer of photogenerated carriers, the deeply photocatalytic oxidation of NO-to-NO 3 – over g-C 3 N 4 is still a daunting challenge. Well-designed heterojunction photocatalysts have been proven to be effective in steering charge transfer for achieving a particular migration path and more active sites, which hold huge promise in further performance stimulation. Herein, in-situ face-to-face hydrothermal approach is developed to prepare a multilayer heterostructure O doping g-C 3 N 4 (O-g-C 3 N 4 ) with W 18 O 49 (O-g-C 3 N 4 @W 18 O 49 ). The experimental and theoretical results show that the unique multilayer heterostructure can improve the separation efficiency of carriers by changing the electron migration path. Moreover, doping O atoms are identified as the newly formed active centers to largely facilitate the activation of NO. Impressively, the O-g-C 3 N 4 @W 18 O 49 photocatalyst thus exhibits largely improved photocatalytic NO removal rate (56.7 %, 0.1 g of sample) and high selectivity of NO to NO 3 – (98.3 %). It outperforms the reported photocatalysts materials in visible light. This study not only provides a facile strategy for experimentally screening advanced photocatalytic materials, but also paves the way for the deep oxidation of NO.
研究领域:
材料科学
·
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Tingfeng Ma,Bin Li,Shouqin Tian,Jiachen Qian,Longxiao Zhou,Qiufen Liu,Baoshun Liu,Xiujian Zhao,Gopinathan Sankar
W 18 O 49 has widely used in photothermal application and photocatalyst due to its strong Localized Surface Plasmon Resonance (LSPR) effect and unique oxygen-deficient structure. In addition, the unstable structure and easily changed valence state of W 5+ make W 18 O 49 potentially photochromic. However, the generally synthesized blue W 18 O 49 particles was in a saturated colored state, delivering a great challenge in exploring its photochromic features, which thus have seldom been studied. Herein, we found that the bleached W 18 O 49 obtained by mild-heating the solvothermal-synthesized blue W 18 O 49 nanoparticles in air had considerable reversible photochromic feature, which can be colored in 1 min under UV irradiation. The photochromic mechanism of W 18 O 49 was revealed through the XRD, XPS and FTIR results. The chromic process was mainly attributed to the changed W 5+ content under different conditions. The photochromic performance was systematically investigated on the W 18 O 49 -based film and which can be significantly improved by Ti doping. Finally, the great potential of the films in the energy-saving smart windows application has verified, and a 10 at.% Ti-doped W 18 O 49 film delivered outstanding optical performance with luminous transmittance ( T lum ) of 87.53% and solar energy modulation efficiency (Δ T sol ) of 30.13%.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Yize Li,Weiqiang Zhou,Xuemin Duan,Danqin Li,Jingkun Xu,Zian Huang,Xiaojing Hao
Exploring high-performance metal oxide electrode materials is an essential way to boost the supercapacitor performance, and metal atom doping can significantly increase oxygen vacancies to improve the conductivity of electrode materials. A hydrothermal method is proposed for the preparation of sea urchin-like Pr-doped W 18 O 49 . A series of characterizations detected that Pr-doped W 18 O 49 produced significant lattice distortion and more amorphous regions, and the better electrochemical performance came from the increased concentration of oxygen vacancies, enlarged lattice spacing, higher specific surface area, and faster ion transport after Pr doping. Electrochemical measurements indicate that the specific capacitance of Pr-doped W 18 O 49 is improved from 381 F g −1 to 453 F g −1 at 3 A g −1 and exhibits a remarkable capacity retention of 95.6 % over 4000 cycles. An asymmetric supercapacitor assembled with this electrode and PPy achieved a high energy density of 21.9 Wh kg −1 at a power density of 701.5 W kg −1 , indicating the significance of Pr-doped W 18 O 49 for energy conversion and storage applications.
研究领域:
材料科学
·
能源存储
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Ruiyang Yu,Hui Qiao,Zongyu Huang,Pinghua Tang,Xiang Qi
Ti2CTx is a typical 2D layered semiconductor material with a high carrier mobility and intriguing photodetector performance. In this work, a Ti2CTx/W18O49 heterostructure was fabricated via a simple one-pot hydrothermal method. The photoelectrochemical (PEC)-type photodetector was constructed by using the as-prepared composite as the electrode material. The Ti2CTx/W18O49 heterostructure clearly exhibited a significant increase in photoresponse compared to that of solitary Ti2CTx and W18O49, as shown by the results of the PEC tests. This demonstrates how the Ti2CTx and W18O49 interface effectively generates and transfers photocarriers, which can enhance the photoresponse performance. Additionally, the constructed Ti2CTx/W18O49 heterostructure-based photodetector’s photocurrent density can practically linearly increase as the irradiation power density rises. The photocurrent density and photoresponsivity can reach 1.42 μA/cm2 and 19.6 μA/W at 0.6 V, respectively. The prepared Ti2CTx/W18O49 heterostructure-based photodetector also shows excellent cycle stability; after more than 2500 s and 125 on/off cycles, the photocurrent shows no obvious attenuation. The superb PEC-type photodetector performance of a Ti2CTx/W18O49 heterostructure holds much promise for photodetection.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Peng Wang,Shisong Guo,Zhixiang Hu,Tiankun Li,Shiliang Pu,Hui Mao,Hong Cai,Zhenfeng Zhu,Hua-Yao Li,Huan Liu
The rapid detection of ppb-level formaldehyde is desirable but challenging for both air quality monitoring and health. Herein, we adopt the ultrasonic-solvothermal method to co-assemble W and Pd precursors to developing a direct and controllable flower-like W 18 O 49 synthesis method, in which evenly dispersed Pd NPs are tightly fixed on the surface of the nanostructure for efficient formaldehyde detection. The sensitization of Pd NPs increases the oxygen vacancies and provides plenty of accessible sites for gas molecules. Meanwhile, the synergistic effect of Pd NPs and flower-like W 18 O 49 interface promotes electron transfer. Thus, the enhanced gas sensing performance of the Pd-sensitized W 18 O 49 could be attributed to chemical and electronic sensitization. The Pd-sensitized W 18 O 49 sensor exhibits extremely low actual detection concentration (50 ppb), ultrasensitive (2.96/50 ppb), ultrafast response (1 sec ), excellent reversibility, and good selectivity. DFT theoretical calculations systematically validate the gas sensing mechanism of Pd-sensitized W 18 O 49 for formaldehyde. This work provides new insights into the design strategy of Pd-sensitized W 18 O 49 nanomaterials for high-performance quantitative detection of formaldehyde gas sensors.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Jian Wei,Li Yuan,Guozheng Liang,Aijuan Gu
Endowing near-infrared light (NIR) induced self-healing coatings with high transparency is an interesting issue with big challenge. Herein, starting from designing an acrylate resin system and surface activated W 18 O 49 nanowires (mW 18 O 49 ), a new kind of NIR induced self-healing composite coating was developed, which is coded as ACWx (x is the loading of mW 18 O 49 in each coating). The effect of mW 18 O 49 loading on the integrated performance of ACWx coatings was studied. As the content of mW 18 O 49 increases, the transparency of ACWx coatings decreases, but the transmittance at 550 nm of all coatings is still >83.9 %. In addition, ACW0.5 and ACW0.65 composite coatings exhibit outstanding NIR induced self-healing ability after irradiation under NIR (power density of 2.5 W/cm 2 ) for 3 min. Meanwhile, the integrated properties including adhesion, flexibility, hardness, gloss, acid and alkali resistance of ACWx composite coatings meet the application requirements of automotive varnishes.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2020
·
IF 4.706
Yaru Shang,Xiaohu Cheng,Ruixia Shi,Qian Ma,Yingzi Wang,Ping Yang
The adsorption experimental results show that W 18 O 49 with oxygen vacancies not only has faster adsorption rates for MB but also has larger adsorption capacities than WO 3 . Besides, the maximum adsorption capacity of urchin-like W 18 O 49 (375.94 mg/g) is about 2.76 times of WO 3 (136.25 mg/g). However, photocatalytic results revealed that WO 3 has better photocatalytic degradation ability than W 18 O 49 . Generally, the adsorption efficiency of urchin-like W 18 O 49 (70.01%) is about 3.94 times of WO 3 (17.78%), while the photodegradation efficiency of WO 3 (62.45%) is 2.38 times of urchin-like W 18 O 49 (26.20%). Therefore, urchin-like W 18 O 49 has the best total removal efficiency, which can remove 96.21% of MB (50 ml, 90 mg/L) within 120 min. These studies emphasize the comprehensive effects of WO 3 and W 18 O 49 on dye removal from two aspects of adsorption and photocatalysis and provide strategies for the preparation of efficient dye removal materials.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2022
·
IF 3.428
Chengwen Lao,Yingying Wang,Jiafan Bai,Wenzhen Peng,Jianxin Wang,Jie Weng
In this study, using diethylene glycol as a soft template and one-step solvothermal method, we synthesized sea urchin-like W 18 O 49 . The physicochemical test results showed that the obtained W 18 O 49 had excellent adsorption and photocatalytic activity. In addition, the obtained sea urchin-like W 18 O 49 exhibited strong near-infrared absorption performance and high photothermal conversion efficiency of 41.8% under the irradiation of 980 nm laser. After 480 s of 980 nm laser irradiation (2.0 W/cm 2 ), the temperature of its aqueous dispersion (1.0 mg/mL) could rise by 49.1 °C rapidly. The results of the cell culture in vitro and the animal experiments in vivo showed that W 18 O 49 had good biocompatibility and could effectively inhibit melanoma cells (B16F10) by using the photothermal effect, showing a good application prospect.
研究领域:
材料科学
·
肿瘤学
·
光化学
·
纳米医学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Ruolin Cheng,Anhu Wang,Shuxun Sang,Huagen Liang,Shiqi Liu,Panagiotis Tsiakaras
The CO 2 cycloaddition of epoxides is a highly attractive long-term carbon fixation strategy, but harsh reaction conditions and expensive catalytic materials limit its industrial application. Herein, low-cost and highly efficient W 18 O 49 -based composites were constructed by in-situ solvothermal synthesis. It is found that W 18 O 49 /g-C 3 N 4 composites exhibit the highest yield of 74% (271 mmol g −1 h −1 ) in the probing reaction of styrene carbonate production. The physicochemical characterizations indicate that the photocatalysis plays a fundamental role in this reaction by promoting the activation of CO 2 and styrene oxide. The crucial role of photogenerated electrons and Lewis acid-base sites is confirmed. In this work, a novel catalyst selection to produce cyclic carbonate under ambient conditions is presented.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 27
·10218-10225
·
IF 5.7
Tingfeng Ma,Bin Li,Yongkang Zhu,Senwei Wu,Xiujian Zhao,Xinhong Chu,Shouqin Tian
Tungsten oxides have attracted much attention and research in the field of photochromic smart windows, but their application is limited by their slow light response and poor reversibility. In order to overcome the limitations, Zn2+-doped W18O49 nanoparticles were prepared using a facile hydrothermal method and they exhibited good photochromic performance with a quick coloring rate under UV irradiation because more oxygen vacancies in the crystal lattice caused by Zn doping could facilitate the reduction of W6+ to W5+, which was confirmed from XRD and XPS results. In addition, the Zn-doped W18O49 nanoparticle-based films showed excellent photochromic properties with a high visible transmittance (Tlum) of 85.33%, a large solar modulation efficiency (ΔTsol) of 47.18% and a fast photochromic speed (3 min) as well as good cycling stability. These properties are better than those reported in most previous works. Therefore, this work can provide a promising photochromic material with high performance for smart windows.
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
Nanomaterials
·
2021
·Vol. 11
·期 1
·104
·
IF 5.076
Hongyu Ma,Yaqi Tan,Zhifei Liu,Jianhong Wei,Rui Xiong
Photocatalytic hydrogen evolution is a promising “green chemistry” route driven by sunlight for the direct water splitting into value-added hydrogen energy. Herein, with the object of exploring the effect of CuO loading on W18O49photocatalytic activity, a 3D Urchin-like CuO modified W18O49(CuO/W18O49) microspheres with different CuO loadings were synthesized via thermochemical precipitation combined with solvent-thermal method. The obtained CuO/W18O49microspheres were analyzed by means of X-ray diffraction (XRD), scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and photoluminescence (PL), etc. The results infer that the urchin-like 3D morphology with a high surface area and abundant 1D nanowires promotes electron transfer, the introduction of CuO further increases the number of active sites, thereby ensuring fast interfacial charge transfer to improve photocatalytic performance. During photocatalytic H2evolution from water splitting, 5 wt.% CuO/W18O49shows the optimal performance, the H2yield is almost 3.22 times that of the undoped counterparts. This work presents that oxygen-vacancy-rich heterojunction nanocomposites can be used as a new strategy to design materials with high photocatalytic activity.Keywords:photocatalysis;CuO modification;oxygen vacancy;W18O49microspheres;water splitting
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
·
2021
·Vol. 38
·期 7
·2100062
·
IF 3.31
Pengfei Yang,Zhihuan Zhao,Shasha Yang,Jianying Lin,Jimin Fan,Bing Zhang
In this study, a chemotherapy-photothermal synergistic anti-tumor system is constructed. Both W 18 O 49 @R-C and PEG-W 18 O 49 @R-C synthesized by hydrothermal method show the potential of photothermal therapy (PTT). The structure of reflux-carbon is bubble-like spherical and W 18 O 49 @R-C obtained by hydrothermal synthesis will cause bubble collapse due to the formation of crystal W 18 O 49 ; thus, the particle size decreases sharply. Furthermore, the photothermal stability of PEG-W 18 O 49 @R-C is higher than that of W 18 O 49 @R-C, and ζ-potential measurement indicates that PEG-W 18 O 49 @R-C has excellent dispersion characteristics. The test of drug loading and drug release performance show that PEG-modified W 18 O 49 @R-C has superior performance on drug loading amount and release capacity. In the synergistic anti-tumor process, the cancer cell viability after co-incubating with PEG-W 18 O 49 @R-C+DOX . HCl (with 808nm) is only 16.6%. These results indicate that PEG-W 18 O 49 @R-C has potential in the treatment of cancer by a combination of PTT and chemotherapy.
研究领域:
肿瘤学
·
材料科学
·
纳米医学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）