CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Qiong Wu,Ran Liu,Fenglin Miao,Guangqing Zhang,Wengang Li,Yujun Song
Among all the nanomaterials, ultra-small nanohybrids have gained considerable attention as drugs, contrast agents, molecular nanoprobes, and catalysts owing to their multi-functionality and size effect. However, their extension and commercialization are restricted due to low synthetic efficiency and uncontrollable structure. Herein, a pilot microfluidic system (PMS) was built to successfully synthesize the ultra-small (2.3 ± 0.7 nm) CoFe-WO x nanohybrids (NHs) with a tiny CoFe core and a mixed metal oxides shell (CoWO 4 -Fe 2 WO 6 -WO 3 ). Furthermore, the CoFe-WO x NHs displayed excellent multi-modal imaging properties, which could be observed optically via a dark-field microscope, imaged through X-ray computed tomography and magnetic resonance imaging device. For the first time, hybridization between metal cores and metal-oxide shells produced two strong absorption peaks in the long band of near infrared radiation, one at 1450 nm and the other at 1980 nm. Overall, CoFe-WO x NHs emonstrated distinct magnetic and optical properties and multimode imaging capabilities due to their microstructure and composition. These findings may prove to be effective in finding alternatives for nanoprobes that can be used for visible/infrared/MRI/CT imaging, as well as pre-drugs for photothermal/photodynamic and magnetothermal/magneto-dynamic therapies.
研究领域:
纳米技术
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
ChemCatChem
·
2022
·Vol. 14
·期 14
·e202200341
·
IF 5.497
Junxiu Zhao,Bo Hou,Heqin Guo,Litao Jia,Pengyu Niu,Congbiao Chen,Hongjuan Xi,Debao Li,Jianli Zhang
Graphical Surface hydroxyl groups of the support play a crucial role for WO x -support interaction. A strong interaction between WO x species and support can improve the dispersion of WO x species and generate more WO x -support interface Brønsted acid sites, which are beneficial for 1,3-propanediol synthesis in glycerol hydrogenolysis. For Pt-WO x -based catalysts, researchers pay much attention to study the influence of Pt-WO x interaction on glycerol hydrogenolysis, ignoring the interaction between WO x and support. Herein, four Pt/W/SiZr-T catalysts with different surface hydroxyl groups on support are prepared and characterized. The results show that bibridged (OH II ) and tribridged hydroxyl groups (OH III ) on SiZr-T supports could react with WO x species through forming Zr−O−W bands and retard the agglomeration of WO x species. The highly dispersed WO x species and Zr−O−W bands are the origination of inherent and in-situ generated Brønsted acid, which are beneficial for 1,3-propanediol synthesis. As a result, Pt/W/SiZr-70 exhibits outstanding performance due to abundant OH II and OH III on SiZr-70. The initial space time yield of 1,3-propanediol on Pt/W/SiZr-70 reaches 2.280 g 1,3-PDO ⋅ g cat −1 ⋅ h −1 , the highest among reported results. This r esearch reveals the role of WO x -support interaction on glycerol hydrogenolysis and provides a new direction to design Pt-WO x -based catalysts for selective hydrogenation reactions.
研究领域:
催化
·
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
Joule
·
2019
·
IF 0
Man Yang,Haifeng Qi,Fei Liu,Yujing Ren,Xiaoli Pan,Leilei Zhang,Xiaoyan Liu,Hua Wang,Jifeng Pang,Mingyuan Zheng,Aiqin Wang,Tao Zhang
Cellulosic ethanol is one of the most important biofuels, yet its commercial production is hindered by the low-efficiency and high-cost bioconversion process. Here, we report a new chemocatalytic approach for the one-pot production of cellulosic ethanol. With a multifunctional Mo/Pt/WO x catalyst, cellulose is directly converted to ethanol in a one-pot reaction with a yield as high as 43.2 C%. Kinetic analysis reveals that such a one-pot process involves tandem catalysis from cellulose to ethylene glycol (rapid) followed by hydrogenolysis of ethylene glycol to ethanol (slow). Characterizations show that isolated and low-coordinated MoO x bonds to metallic Pt particles on the mesoporous WO x support, constituting x OMo–Pt–WO x interfacial sites, which offer high activity for C–O cleavage of ethylene glycol.
研究领域:
化学工程
·
可再生资源与环境科学
✓ 已验证
DOI
Biology-Basel
·
2025
·Vol. 14
·期 4
·411
·
IF 3.5
Qun Zhang,Xiuyue Xu,Ling Yang
Simple SummaryIn this study, theWOXgene family of Korean pine was analyzed, and 21 family members were identified using bioinformatics methods. The results showed that the total number of amino acids in all proteins is between 164 and 488 aa, with molecular weights between 18,456.30 and 53,893.18 Da and isoelectric point values between 5.56 and 9.80. According to the predicted results, the average hydrophilicity coefficient of thePkWOXproteins is between −0.993 and −0.565. The phylogenetic tree divides thePkWOXgenes into three sub-branches. A total of 21PkWOXgenes are unevenly distributed on 7 of 12 chromosomes. ThePkWOXpromoters contain cis-acting elements such as stress response, light response, hormone response, and meristem regulation. GO entry forPkWOXis a biological process and molecular function.PkWOX16was expressed in all tissues.PkWOX2,3had higher expression in the embryonic callus, non-embryonic callus, somatic embryo, and zygotic embryo.PkWOX2,3,and16were located in the nucleus and in the cell membrane. ThePkWOX2and3proteins exhibited transcriptional self-activation activity, whilePkWOX16did not. In this study, the members of the WOX transcription factor family were identified and systematically analyzed in Korean pine, laying a foundation for the research on their functions.(1) Background:WOX(WUSCHEL-related homologous box) is a plant-specific transcription factor involved in plant development and stress response. It has been reported to be involved in processes such as growth and development, stem cell division and differentiation, and organ development; (2) Methods: In this study, bioinformatics was used to identify and analyze theWOXgene family of Korean pine. The gene characteristics were identified and analyzed through yeast transcriptional activation assays as well as subcellular localization experiments; (3) Results: A total of 21 members of theWOXgene family of Korean pine were identified in this study. The phylogenetic tree divides thePkWOXgenes into three sub-branches. 21PkWOXgenes are unevenly distributed on 7 of the 12 chromosomes.PkWOX16was expressed in all tissues.PkWOX2,3had higher expression in the embryonic callus, non-embryonic callus, somatic embryo, and zygotic embryo.PkWOX2,3and16were located in the nucleus and in the cell membrane. ThePkWOX2and3proteins exhibited transcriptional self-activation activity, whilePkWOX16did not; (4) Conclusions: In this study, the members of the WOX transcription factor family in Korean pine were identified and systematically analyzed, laying a foundation for their subsequent functional research.
研究领域:
植物学
·
遗传学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Junji Guo,Xungang Diao,Mei Wang,Zhi-Bin Zhang,Yizhu Xie
Electrochromic devices with unique advantages of electrical/optical bistability are highly desired for energy-saving and information storage applications. Here, we put forward a self-driven Al-ion electrochromic system, which utilizes WOx films, Cu foil, and graphite rod as electrochromic optical modulation and graph display electrodes, coloration potential supplying electrodes, and bleaching potential supplying electrodes, respectively. The inactive Cu electrode can not only realize the effective Al3+ cation intercalation into electrochromic WOx electrodes but also eliminate the problem of metal anode consumption. The electrochromic WOx electrodes cycled in Al3+ aqueous media exhibit a wide potential window (∼1.5 V), high coloration efficiency (36.0 cm2/C), and super-long-term cycle stability (>2000 cycles). The dynamic optical modulation and static graph display function can be achieved independently only by switching the electrode connection mode, thus bringing more features to this electrochromic system. For a large-area electrochromic system (10 × 10 cm2), the absolute transmittance value in its color-neutral state can reach about 41% (27%) at 633 nm (780 nm) by connecting the Cu and WOx electrodes for 140 s. The original transparent state can be readily recovered by replacing the Cu foil with the graphite rod. This work throws light on next-generation electrochromic applications for optical/thermal modulation, privacy protection, and information display.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 17
·7957-7960
·
IF 3.3
Zhicheng Luo,Zhiguo Zhu,Lupeng Han,Rui Xiao,Dawang Chu
WOx/ZrO2 is effective in the hydrogenolysis of cellulose to C3 products but the active sites on the W–Zr interfaces are hardly controlled. Herein, we prepared WOx/ZrO2 catalysts with active WOx species by simply varying the reduction temperatures, which selectively achieved C3 alcohol formation. A series of characterizations showed that increased reduction temperatures (400–600 °C) led to the formation of more dispersed WOx, while higher reduction temperatures (>600 °C) contributed to producing aggregated WO3 and W2C. At 600 °C, the dispersity of WOx peaked with a W5+/∑Wn+ ratio of 19%, providing abundant Lewis acid sites and oxygen vacancies (Vo), which were the active sites for glucose isomerization to fructose and C–C cleavage of fructose. A selectivity of 48% for C3 alcohols was obtained over the optimized WOx/ZrO2(600 °C) + Ru/AC catalyst.
研究领域:
化学工程
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2024
·
IF 2.9
Kaibo Yuan,Qinqin Qian,Miaomiao Wu,Bingxia Wang,Shuwen Zeng,Dong Chen,Muhammad Danang Birowosuto,Diing Shenp Ang,Chenjie Gu
Active control the surface-enhanced Raman scattering (SERS) enhancement shows great potential for realizing smart detection of different molecules. However, conventional methods usually involve time-consuming structural design or sophisticated fabrication process. Herein, we reported an electrically tunable field effect transistor (FET) comprised by WOx/MoOx hybrid as the SERS active layer. In the experiment, WOx/MoOx hybrid were first prepared by mixing different molar ratios of WOx and MoOx oxides. Then, R6G molecules was used as the Raman reporter, it showed that the intensity of the SERS signal observed on the most optimal hybrids (molar ratio = 1:3) could be promoted by two times as high as that observed on a single WOx or MoOx based substrate, which was ascribed to enhanced charge transfer efficiency by the constructed nano-heterojunction between the WOx and MoOx oxides. Thereafter, a back-gate FET was fabricated on a SiO2/Si substrate, and the most optimal WOx/MoOx hybrid was deposited as the gate channel as well as the SERS active layer. After that, a series of gate bias (from -15 V to 15 V) were implemented to actively tune the SERS performance of the FET. It evidenced that SERS EF can be further tuned from 2.39 × 107 (-15 V) to 6.55 × 107 (+10 V), which is ~7.4 / 4.1 times high than that observed on the pure WOx device (8.81 × 106) or pure MoOx (1.61 × 107) device, respectively. Finally, the mechanism behind the electrical tuning strategy was investigated. It revealed that a positive voltage would bend the conduction band down, which raised the electron density near the Fermi level. Consequently, it triggered the resonance charge transfer and significantly improved the SERS performance. On the contrary, a negative gate voltage attracted the holes to the Fermi level, which deferred the charge transfer process, and caused the degradation of the SERS enhancement.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Yanshan Mo,Shouquan Feng,Tianqi Yu,Jinli Chen,Guangfu Qian,Lin Luo,Shibin Yin
PtNi alloy nanoparticles display promising catalytic activity for oxygen reduction reaction (ORR), while the Ostwald ripening of particles and the dissolution/migration of surface atoms greatly affect its stability thus restricting the application. Herein, the WO x -surface modified PtNi alloy nanowires (WO x -PtNi NWs) exhibiting enhanced ORR catalytic property is reported, which has high aspect ratio with the diameter of only 2 ∼ 3 nm. It is found that the WO x -PtNi NWs shows a volcano relationship between the ORR activity and the content of WO x . The WO x-(0.25) -PtNi NWs has the best performance among all the synthesized catalysts. Its mass activity (0.85 A mg −1 Pt ) is reduced by only 23.89% after 30k cycles durability test, which is much more stable than that of PtNi NWs (0.33 A mg −1 Pt , 45.94%) and Pt/C (0.14 A mg −1 Pt , 57.79%). Hence this work achieves an effective regulation of the ORR activity for PtNi alloy NWs by the synergistic effect of WO x on Pt.
研究领域:
催化
·
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2018
·
IF 0
Ping Liu,Chen Wang,Dongying Zhou,Quan Yuan,Yu Wang,Yao Hu,Dongwei Han,Lai Feng
PEDOT-coated WOx nanorodes (NRs) were prepared for the first time by simply stirring WOx nanowires (NWs) with 3,4-ethylenedioxythiophene (EDOT) in aqueous solution. A series of spectroscopic characterizations indicate that the polymerization of EDOT occurrs not only on the surface but also along the [010] planes of WOx NW, resulting in the truncation of long WOx NW to produce WOx@PEDOT NRs with abundant oxygen vacancies. Furthermore, WOx@PEDOT NRs were used to prepare a hole transport layer (HTL) in planar p–i–n perovskite solar cells (PeSCs). The WOx@PEDOT-based devices yielded a comparable average power conversion efficiency (PCE) of 12.89% with improved open-circuit voltage (VOC) and fill factor (FF) but lower short-circuit current density (JSC), as compared to the devices with conventional PEDOT:PSS (12.88%). The observed device performance is mainly attributed to the better perovskite texture on the WOx@PEDOT HTL, improved energy alignment, and suppressed charge recombination at the WOx@PEDOT/perovskite interface as well as lower charge conductivity of the WOx@PEDOT HTL. In addition, the PeSCs based on WOx@PEDOT-doped PEDOT:PSS showed remarkably improved PCEs up to 14.73%, which may be ascrible to the combined merit of WOx@PEDOT NRs and PEDOT:PSS. More impressively, benefiting from the inherent neutral nature of WOx@PEDOT NRs, WOx@PEDOT-based devices exhibited obviously improved stability compared to that with PEDOT:PSS HTL. These results thus demonstrate a path toward the development of new hybrid nanostructures for efficient and stable PeSCs.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
RESEARCH ON CHEMICAL INTERMEDIATES
·
2022
·Vol. 48
·期 6
·2489-2507
·
IF 3.134
Shao Lingling,Zhou Jiancheng,Zhang Ming,Zhang Qianyi,Wang Nan,Zhu Fengfan,Wang Ke,Li Naixu
The one-pot catalytic conversion of cellulose into ethylene glycol (EG) is an attractive way of biomass utilization. However, low-cost, efficient, and stable catalysts are the premise and research challenges of industrial application. Herein, the magnetic recyclable W–Ni@C catalyst was synthesized by in-situ pyrolysis of Ni-MOFs impregnated with ammonium metatungstate. Compared with the Ni-W bimetallic catalysts prepared by the impregnation method and the sol–gel method, the W–Ni@C catalyst for cellulose hydrogenolysis reaction can achieve a higher ethylene glycol yield (67.1% vs 43.3% and 42.6%) and 100% of cellulose conversion rate. The uniformly dispersed Ni nanoparticles and abundant defective WO x were formed in a reductive atmosphere generated in pyrolysis of Ni-MOFs, which was indispensable for the hydrogenolysis of cellulose into EG. Besides, the hierarchical porous carbon derived from organic ligands in Ni-MOFs reduces the mass transfer resistance while confining Ni nanoparticles and WO x to prevent their leaching, effectively enhancing the stability of the W–Ni@C catalyst. Therefore, the remarkable catalytic performance, the simple and effective recovery method as well as satisfying stability would make W–Ni@C become a promising catalyst for the conversion of cellulose to EG. Graphical abstract
研究领域:
材料科学
·
催化化学
·
生物质转化
✓ 已验证
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2022
·
IF 8.047
Xiaowen Sun,Qing-Nan Wang,Shengyang Wang,Pengfei Zhang,Zhendong Feng,Xianwen Zhang,Zhaochi Feng,Can Li
Photocatalytic selective oxidation of p -xylene with O 2 offers a mild pathway to synthesize p -methyl benzaldehyde ( p -MBA), which is one of the primary precursors in the manufacture of fine chemicals. Here, we report that Au/WO x /TiO 2 photocatalyst selectively catalyzes the oxidation of p -xylene to p -MBA with 88.6% selectivity at 1.0% conversion, the formation of CO x is suppressed to 0.8%. Kinetic experiments indicate that p -methylbenzyl alcohol and p -MBA are initial products. p -Methylbenzyl alcohol is further oxidized to form p -MBA, p -methylbenzyl acid and CO x ; p -MBA is further oxidized to p -methylbenzyl acid and CO x . On TiO 2 surface, p -methylbenzyl alcohol is more prone to directly combust to CO x by O 2 – . Loading of WO x can weaken the adsorption ability of p -methylbenzyl alcohol on the catalyst surface to avoid the combustion. Meanwhile, WO x and Au can facilitate the separation of photo-generated carriers to attain high activity and suppress the O 2 – formation to obtain high selectivity.
研究领域:
催化
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Feng He,Qianxiang Xiao,Yin Chen,Hongqing Wang,Xiangke Wang
In the photoreduction of U(VI), protective gases and additional sacrificial agents are still the major obstacles. Herein, we developed an oxygen-deficient WO x /g-C 3 N 4 catalyst for the simultaneous reduction of U(VI) and preparation of benzaldehyde by selective oxidation of benzyl alcohol without protective gases and sacrificial agents. The removal of U(VI) by WO x /g-C 3 N 4 could reach 98.5% and the conversion of benzyl alcohol was nearly 32% with a selectivity close to 100%. Compared with single g-C 3 N 4 and defect-free WO 3 , the photoreduction activity of WO x /g-C 3 N 4 was 10.4 and 7 times higher, respectively. Besides, the role of oxygen and oxygen defects was explored. Owing to oxygen defects in the catalyst, oxygen was adsorbed on the oxidation end (WO x ) of the catalyst and activated without entering the reduction end to interfere with the photoreduction of U(VI), while favoring the generation of •O 2 - to improve the selectivity of benzaldehyde. Finally, a new mechanism was proposed.
研究领域:
环境科学
·
催化
·
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）