JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
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2022
·Vol. 103
·期 3
·799-806
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IF 2.606
Wang Haishan,Ling Fuxin,Li Yule,Wu Dingzhang,Qi Longfei,Liang Zhaowei,Chen Qingming,Zhang Hui
La 0.825 Sr 0.175 Mn 1− x V x O 3 ( x = 0.00–0.05) ceramics were prepared by sol–gel method. X-ray diffraction analysis illustrates that all samples are perovskite structure, no impurity phases were detected. SEM shows that the grains are closely connected. With increasing V doping level, the grain size decreased from 27.78 μm ( x = 0.00) to 11.23 μm ( x = 0.05), which results into the enhancement of grain boundary effect. The temperature dependence of resistivity shows that all samples exhibit typical insulator-metal transition. With V doping up to 0.01, temperature coefficient of resistivity ( TCR ) increases from 4.65% K −1 to 6.1% K −1 , and the magnetoresistance ( MR ) value reaches 38.629%. The electrical and the magnetic properties of V-doped La 0.825 Sr 0.175 MnO 3 present a complicated behavior with further doping of V. These findings indicate that the properties of manganites can be effectively and dramatically tailored by doping of Mn, which meantime facilitate the application of manganites in infrared detector and magnetic sensors.
Graphical abstract
研究领域:
材料科学
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凝聚态物理
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DOI
高影响因子
Materials Today Physics
·
2022
·
IF 11.021
Haipeng Wang,Fei Zhang,Mengmeng Jin,Donglin Zhao,Xiaoya Fan,Zerong Li,Yongsong Luo,Dongdong Zheng,Tingshuai Li,Yan Wang,Binwu Ying,Shengjun Sun,Qian Liu,Xijun Liu,Xuping Sun
Electrocatalytic nitrite (NO 2 − ) reduction to ammonia (NH 3 ) has been an attractive topic, which not only removes NO 2 − pollutants existing in surface water and underground water but also synthesizes value-added NH 3 . Nevertheless, the inactive kinetics for direct six-electron NO 2 − -to-NH 3 conversion makes it challenging to explore efficient electrocatalysts for the NO 2 − reduction reaction (NO 2 RR). Herein, we report a V-doped TiO 2 nanobelt array on a titanium plate (V–TiO 2 /TP) as a highly efficient NO 2 RR electrocatalyst. The experimental results and theoretical calculations clarify that V doping can enhance the intrinsic electrical conductivity and effectively optimize the free energy of the TiO 2 (101) crystal plane in the potential determining step, resulting in a positive effect on electrochemical NO 2 RR to NH 3 . The designed V–TiO 2 /TP exhibits an outstanding electrochemical NO 2 RR property with a high NH 3 yield of 540.8 μmol h −1 cm −2 at −0.7 V and an excellent Faradaic efficiency of 93.2% at −0.6 V versus reversible hydrogen electrode, superior to TiO 2 /TP.
研究领域:
材料科学
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环境科学
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电化学
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DOI
高影响因子
Advanced Healthcare Materials
·
2022
·Vol. 11
·期 16
·2200416
·
IF 11.092
Xingping Quan,Yan Han,Pengde Lu,Yuanfu Ding,Qingfu Wang,Yiyang Li,Jianwen Wei,Qiaoxian Huang,Ruibing Wang,Yonghua Zhao
Thromboembolic stroke is typically characterized by the activation of platelets, resulting in thrombus in the cerebral vascular system, leading to high morbidity and mortality globally. Intravenous thrombolysis by tissue plasminogen activator (tPA) administration within 4.5 h from the onset of symptoms is providing a standard therapeutic strategy for ischemic stroke, but this reagent simultaneously shows potential serious adverse effects, e.g., hemorrhagic transformation. Herein, a novel delivery platform based on Annexin V and platelet membrane is developed for tPA (APLT-PA) to enhance targeting efficiency, therapeutic effects, and reduce the risk of intracerebral hemorrhage in acute ischemic stroke. After preparation by extrusion of platelet membrane and subsequent insertion of Annexin V to liposomes, APLT-PA exhibits a high targeting efficiency to activated platelet in vitro and thrombosis site in vivo, due to the binding to phosphatidylserine (PS) and activated platelet membrane proteins. One dose of APLT-PA leads to obvious thrombolysis and significant improvement of neurological function within 7 days in mice with photochemically induced acute ischemic stroke. This study provides a novel, safe platelet-biomimetic nanomedicine for precise thrombolytic treatment of acute ischemic stroke, and offers new theories for the design and exploitation of cell-mimetic nanomedicine for diverse biomedical applications.
研究领域:
药剂学
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神经科学
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纳米技术
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DOI
PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2025
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IF 7.8
Chenhui Jin,Jie Yang,Rui Zuo,Wanzi Li,Jinsheng Wang,Jing Xu
MnMgAl-layered double hydroxide (MnMgAl-LDHs) was prepared by a coprecipitation method to treat vanadium (V(V)) pollution in solution. To reveal the influence of various factors on the adsorption effect, batch experiments were carried out. The results show that the removal rate of V(V) with 0.05 g MnMgAl-LDHs reached 87.60 %, which was significantly greater than that of MgAl-LDHs (36.60 %). The initial pH of the solution and the presence of coexisting anions (such as CO 3 2- , HPO 4 2- , and SO 4 2- ) influenced the adsorption effect. The pseudo-second-order kinetic equation fitted well with the adsorption process , indicating that the adsorption was a chemical reaction. The results of isothermal adsorption tests showed the adsorption proceeded smoothly. A variety of material characterization methods were adopted to explain the structural characteristics and chemical composition of the adsorbent before and after the reaction. To further elucidate the adsorption mechanism, the stability and electronic structure were analyzed based on density functional theory (DFT). Mn and hydroxyl groups were the main active sites, and the mechanisms were mainly redox and complexation. The phenomenon of the enhanced adsorption effect of MnMgAl-LDHs was confirmed from a microscopic perspective. In addition, the binding effect of MnMgAl-LDHs with different anions was simulated, which provided a theoretical basis for the treatment of complex anion pollution. This study combines experiments and theoretical calculations, which not only improves the scientific nature of the conclusions but also provides ideas for future adsorbent design optimization and V(V) wastewater treatment .
研究领域:
环境化学
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材料科学
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污染治理
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物理化学
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水处理技术
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DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 23
·5360
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IF 3.2
Yanhui Jiao,Xiaoqian Wang,Zisheng Tang,Manrui Liu,Chengqi Liu,Qi Zhang,Yong Liu
Over the past few years, two-dimensional transition metal dichalcogenides (TMDCs) have garnered substantial attention in the field of two-dimensional materials research, owing to their exceptional physicochemical properties. Notably, V-WSe2distinguishes itself by reducing the Schottky barrier at the interface between the material and metal electrodes, thus exhibiting remarkable potential for applications in optoelectronic devices. Our work explores the synthesis of monolayer V-WSe2through halide-assisted atmospheric-pressure chemical vapor deposition (APCVD), with an emphasis on the effects of various halide types on the growth mechanism. In addition, we investigate the impact of vanadium (V) content on the performance of WSe2. Comprehensive optical and structural characterizations of the synthesized material were systematically performed. The findings indicate that incorporating halide salts effectively reduces the volatilization temperature of tungsten trioxide (WO3), thereby markedly enhancing reaction controllability and material crystallinity. Among the tested halide salts, KCl, NaCl, and KI, KI demonstrated the capability to achieve the lowest growth temperature. Varying the V content in the V-WSe2structure significantly influences the optical properties, with higher vanadium concentrations reducing the material’s optical bandgap and Raman frequency. This study highlights the critical role of halides and vanadium content in the material growth process, providing valuable insights for the controlled synthesis of two-dimensional TMDC materials and how varying vanadium concentrations also affect the material’s performance.
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DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2023
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IF 4.3
Qingyun He,Shanxi Gong,Qinghua Liang,Zhifeng Liu,Binbin Shao,Ting Wu,Yuan Pan,Xiansheng Zhang,Miao He,Lin Ge,Jingwen Sun
A novel Schottky heterojunction was obtained by co-calcining fish-scale tubular carbon nitride (FTCN), V-BiOIO 3 and Tungsten carbide (WC) for photocatalytic degradation of tetracycline hydrochloride (TCH). The novel Schottky heterojunction has been analyzed by several characterizations and experiments. The case of photocatalytic degradation was studied for different initial concentrations, electrolyte and pH, respectively. The experiments have indicated that the V-BiOIO 3 /g-C 3 N 4 /WC performed an excellent activity of photocatalytic for TCH degradation (89.0%). In the mechanism analysis, we first deduce that the V-BiO3/FTCN compound belongs to the S-scheme heterojunction photocatalysts based on the properties of the band gap structure, which can effectively suppress recombination of joint carriers. Secondly, the introduction of the cocatalyst WC formed Schottky junction, which could play a role as an electronic library to trap e − and promote the separation of photo-induced carrier and thus maximize the strong oxidation ability of h + . In addition, the introduction of WC could also significantly enhance the optical absorption properties of the composites. This research could provide a new idea for the construction of novel and efficient carbon nitride-based photocatalysts under VSL (visible light), and promote its practical application in environmental remediation.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
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2021
·Vol. 26
·期 2
·449-456
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IF 2.647
Liu Shanshan,Li Chenyao,Wang Dongxin,Li Junyi,Yuan Rui,Che Yusi,He Jilin,Song Jianxun
In this research, the reduction mechanism of Nb(V) under various [F − ]/[Nb n+ ] ratios ( α ) was investigated by a series of electrochemical techniques, such as square wave voltammetry (SWV) and chronopotentiometry (CP). We previously studied the electrode reduction process of Nb(V) and revealed that was Nb(V) → Nb(III) → Nb(I) → Nb in NaCl-KCl molten salt. It was found in this research that the electrode reduction process of Nb(V) ion was shortened to Nb(V) → Nb(III) → Nb when α was equal to 1.0; furthermore, the electrode reduction process of Nb(V) ion transforms to Nb(V) → Nb(IV) → Nb when α was greater than or equal to 5.0. Moreover, the reaction mechanism was also discussed in this work. Metallic niobium was collected on a molybdenum electrode under the condition of higher fluoride content after electrolysis in the melt.
研究领域:
材料科学
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电化学
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DOI
高影响因子
Food Bioscience
·
2024
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IF 4.8
Shiqin Qing,Zhaoqing Yang,Wuyin Weng,Ping Li,Zhongyang Ren,Linfan Shi
Trimethylamine (TMA), which is known to severely affect consumer acceptance and application, is the main compound of sea cucumber intestinal peptides. Herein, different V-type crystalline starches (V 6a/h , V 7a/h , V 8a/h ) were prepared using high amylose maize starch for the adsorption of TMA. After analyzing the structure of V-type starches, the V 8 -type starch had a smaller and more evenly dispersed particles with additional surface pores and cracks, and reduced relative crystallinity compared with V 6 - and V 7 -type starch. The relative crystallinity of V 6a -, V 6h -, V 7a -, V 7h -, V 8a -, and V 8h -type starches was 59.1%, 51.8%, 42.7%, 41.3%, 40.4%, and 40.1%, respectively. Adsorption models for V-type starches and TMA helped to analyze the adsorption kinetics characteristics and investigate the effect of different V-type starches on adsorption. Moreover, its adsorption kinetics process agreed with pseudo-second-order kinetic model ( R 2 > 0.96). Note that different V-type starches demonstrate good adsorption effects on TMA, and the removal rate is as follows: V 8h > V 8a > V 7h > V 7a > V 6h > V 6a . Herein, we used environmental protection and food-grade V-type starches to effectively adsorb TMA and ensure a theoretical foundation for enhancing the flavor and quality of functional seafoods.
研究领域:
食品科学
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生物化学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2021
·Vol. 45
·期 31
·13964-13968
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IF 3.591
Wei Xiong,Xiaoyan Li,Xue Ye,Tao Huang,Xingyu Feng,Zhencheng Huang,Shenghua Ye,Xiangzhong Ren,Qianling Zhang,Jianhong Liu
Asymmetric structures have attracted much attention owing to their potential application in drug delivery, optoelectronics and catalysis. However, current reported works for the preparation of asymmetric particles rely mainly on emulsion, seeding, hydrothermal and templating approaches, but facile strategies are seldom developed. Herein, we first utilize low-cost monomers of thiourea and formaldehyde to fabricate a peculiar V-notched half-open polymer architecture via a facile precipitation polymerization method in a mixed solvent of water/ethanol (1 : 1 v/v) at room temperature, where the volume ratio between water and ethanol can adjust the open angle of the microspheres. Impressively, this method is readily carried out, and no templates, surfactants, hydrothermal devices, complex procedures or toxic solvents are utilized. This synthetic strategy provides a facile approach to prepare V-notched half-open polymer microspheres with potential for materials engineering.
研究领域:
材料科学
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化学工程
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药物递送
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DOI
高影响因子
Environmental Technology & Innovation
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2024
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IF 6.7
Dayong Luo,XiaoSong Tian,Ruxiang Qin
Iron reducing bacterium Acidiphilium cryputum JF-5 was used to biologically load lanthanum on bentonite (BLB) to remove arsenic(V) from solution. By biological reductive release of iron from bentonite and lanthanum loading, new lanthanum-loaded bentonite was prepared and the adsorption efficiency of arsenic(V) was improved from 7.87 mg/g to 22.69 mg/g in bath experiment. The mobilization of the dispersed biologically loaded lanthanum bentonite particles can be described by the Convection-Dispersion Equation. The breakthrough ability of biologically lanthanum-loaded bentonite (BLB) increased by 5.5 times when increasing flow velocities from 90 mL/h to 360 mL/h. When injected BLB into arsenic(V)-containing pre water of quartz column, the concentration of arsenic(V) could quickly decrease the initial concentration of arsenic(V) from 2000 μg/L to lower than limit for drinking water and keep relative stable. Meanwhile, the hydraulic conductivity of treatment system is also improved compared to prinstine bentonite due to iron-deficient in BLB. The results suggest that biologically load lanthanum bentonite may be an effective modified mineral for remediating arsenic(V)-containing soil.
研究领域:
环境科学
·
微生物学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2024
·
IF 6.3
Wangchang Geng,Pengfei Song,Xinrou Cao,Libing Duan
Metal-organic frameworks (MOFs)-derived metal oxides are characterized by high porosity, large specific surface area, controllable composition, and tunable pore size, which make them have good potential as gas sensing materials. In this paper, Ni 3 V 2 O 8 @NiO hollow microspheres derived from bimetallic Ni/V-MOFs were synthesized using a three-step method (solvothermal method, cation-exchange method, and annealing process). XRD, Raman, SEM, TEM, XPS, and BET techniques were employed to investigate the structure, morphology, specific surface area, pore size distributions, elemental composition, and chemical state of Ni 3 V 2 O 8 @NiO composites. Gas sensing performance studies showed that the NV@NiO-2 sensor exhibited higher response (43.7) to 100 ppm triethylamine at a lower operating temperature (240℃), shorter response/recovery time (88 s/127 s), higher selectivity, lower detection limit (4.5 ppb), and better repeatability. In addition, the NV@NiO-2 sensor exhibited a strong linear relationship (R 2 = 0.996) between response and gas concentration across a range of 1–100 ppm. The present work serves as a valuable reference for the preparation of triethylamine sensing materials with high specific surface area, high porosity, high response and high selectivity.
研究领域:
材料科学
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化学传感器
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高影响因子
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
·
2016
·Vol. 19
·期 12
·1238-1250
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IF 1.087
Mian HR Mahmood,Hua-Hua Wang,Hai-Yang Liu,Chi-Kwong Chang
Seven A 3 - and trans -A 2 B manganese(III) corroles ( 1–7- Mn) differing widely in their electronic and steric features were synthesized and transformed to their corresponding β -brominated manganese(III) corroles derivatives ( 1a–7a- Mn). Their corresponding (oxo)manganese(V) corroles 1–7- Mn(oxo) and 1a–7a- Mn(oxo) were further prepapred by treating with iodosylbenzene (PhIO). The reactivity for the oxygen atom transfer from 1–7- Mn(oxo) to styrene followed the order of 1- Mn(oxo) > 2- Mn(oxo) > 7- Mn(oxo) > 4- Mn(oxo) > 3- Mn(oxo) > 6- Mn(oxo) ≈ 5- Mn(oxo). The same pattern was observed for their β -brominated analogs 1a–7a- Mn(oxo), albeit their reactivity was remarkably higher. The steric protection of Mn V ≡ O moiety by ortho – ortho ′-dibromophenyl substituents was found to enhance the stability of (oxo)manganese(V) corroles significantly.
研究领域:
化学
·
材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）