IEEE SENSORS JOURNAL
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2024
·
IF 4.3
Yu Wan,Qingsong Luo,Zhenxing Wang,Shuang Gao,Yuting Wang,Changhao Feng
The present study focuses on the synthesis of BiFeO
3
/Bi
2
Fe
4
O
9
composite nanofibers via electrospinning, which exhibit enhanced gas sensing properties towards n-butanol. Notably, the sensors based on 11.3-BFO nanofibers demonstrate a remarkable response of 40.8 to 100 ppm n-butanol, representing an approximately 3.4-fold improvement compared to pure BiFeO
3
nanofibers. Additionally, the 11.3-BFO gas sensor exhibits a rapid response time (18 s) and recovery time (37 s) when operated at a temperature of 150°C. It also exhibits excellent selectivity, good repeatability, and long-term stability. The improved gas sensing performance can be attributed to the formation of heterojunctions and a more textured surface, thereby indicating the potential application of BiFeO
3
/Bi
2
Fe
4
O
9
composite nanofibers as a gas sensor for n-butanol detection. This study further validates the efficacy of constructing heterojunctions in improving the gas-sensitive properties of metal-oxide semiconductor, thereby providing valuable insights for synthesizing and investigating heterojunctions.
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Materials
·
2025
·Vol. 18
·期 7
·1550
·
IF 3.2
Ke Wang,Weifeng Li,Yumei Long
As an environmentally friendly and clean energy technology, solar-driven interfacial evaporation technology has attracted wide attention. However, organic pollutants can easily pollute distilled water during the evaporation of wastewater. In this work, we report a strategy of N-TiO2/C solar absorption with a low bandgap (2.33 eV), excellent light absorption ability, and high photothermal conversion efficiency (48.2%). Black N-TiO2/C was prepared by the sol-gel method in the presence of hexamethylenetetramine as a source of nitrogen and carbon. The simultaneous N doping and C with superior photothermal effect rapidly increased the surface temperature of the material, reduced the recombination rate of electrons and holes, and improved the photocatalytic activity, showing great potential for solar thermal energy conversion. The prepared solar absorbent and polyurethane (PU) were mixed evenly to form a porous N-TiO2/C/PU (NTCP) foam for purifying water. The evaporator produced clean water at a rate of 1.73 kg m−2h−1under the simulated sunlight of 1 sun irradiation. Meanwhile, the evaporator simultaneously photodegraded methylene blue (MB) and rhodamine B (RhB) underwater at a removal rate > 90%. The bifunctional solar water evaporation device combining photocatalytic and photothermal effects holds great potential for water purification.
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PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Yongqiang Wang,Xingyu Hou,Yali Li,Xue Sun,Rui Hu,Yuguang Lv,Rui Jia,Lixin Ding
Luteolin (3′,4′,5,7-tetrahydroxyflavone, LTL) is a kind of hydrophobic flavonoid, which has a number of pharmacological actions. It has a number of pharmacological actions, including anti-inflammatory, antioxidant, anticancer, and antihepatic fibrosis properties. High-dose LTL, on the other hand, can cause oxidative DNA damage and hydroxyl radical generation. It is critical to create easy, sensitive, and dependable LTL detection technologies and delivery methods for LTL quality control, clinical drug monitoring and enhancing drug bioavailability. In this work, a novel phenylboronic acid derived quantum dots (P-QDs) were synthesized for LTL sensitive detection and pH-responsive delivery. It showed remarkable selectivity and a brilliant fluorescence with a quantum yield of 43.62 %. In vitro experiments reveal negligible cytotoxicity. P-QDs and LTL coupling (P-QDs/LTL) showed powerful proliferation inhibition and migration restriction effects on HepG2 cells. In addition, P-QDs/LTL could time-dependently release it to restore fluorescence in the microacidic environment of HepG2 cells, thus demonstrating satisfactory fluorescence imaging capability. This strategy demonstrated a favourable linear relationship between LTL concentration and the fluorescence intensity of P-QDs in the range of 0.02–200 μM ( R 2 = 0.9952), with a detection limit of 1.16 nM (S/N=3). The recoveries in different real samples were in the range of 85.23 %-108.04 % with RSDs ≤6.1 %. The material is both a new attempt at LTL detection methodology and has significant promise for providing pH-responsive intracellular release of drug monitoring and cancer therapies from naked QDs without the requirement for sophisticated modified grafting.
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高影响因子
RSC Advances
·
2012
·Vol. 2
·期 21
·8157-8163
·
IF 0
Dingsheng Yuan,Xiaoli Yuan,Shuangli Zhou,Wujun Zou,Tianxiang Zhou
Nitrogen-doped carbon nanorods (N-CNRs) are prepared by a direct carbonization method using polyaniline nanorods as the carbon precursor. The electrochemical behavior of the N-CNRs-Nafion modified electrode is evaluated in connection with dopamine and ascorbic acid by cyclic voltammetry and differential pulse voltammetry. Experimental results indicate that the N-CNRs modified electrode has improved current response and fast electron transfer kinetics. The linear response for the selective determination of dopamine in the presence of ascorbic acid is obtained in the range of 0.008 μM to 15.0 μM with a detection limit of 8.9 × 10−9 M (S/N = 3) by differential pulse voltammetry under optimum conditions. The N-CNRs-Nafion modified electrode exhibits a wide linear range, very low detection limit and anti-interference ability. Meanwhile, a kinetic reaction process and a reaction mechanism for the N-CNRs are also proposed.
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ENERGY & FUELS
·
2012
·
IF 2.721
Wenjun Fang,Dongbei Shao,Xiaoxing Lu,Yongsheng Guo,Li Xu
A total of 10 new N-alkyl piperazinium-based ionic liquids (ILs) have been prepared, and they are used as extractants for removing aromatics from three kinds of hydrocarbon fuels. A total of 3 ILs, N-methyl piperazinium lactate (MPL), N-ethyl piperazinium lactate (EPL), and N-ethyl piperazinium propionate (EPP), in the liquid state at room temperature are used directly for extraction, while the other 7 ILs in the solid state at room temperature are used with methanol as the co-solvent. Effects on the extraction efficiency of the temperature and the amounts of IL and co-solvent are investigated. The results indicate that the amounts of IL and co-solvent play very important roles in the extraction process and the efficiency is greatly influenced by the cation and anion structures in the N-alkyl piperazinium-based ILs. In comparison to 1,1,3,3-tetramethylguanidinium lactate (TMGL), the extraction capability order is EPP > EPL > MPL > TMGL. The ILs with aromatic anions are found to have better extraction capability than the others. Furthermore, recycling of ILs reflects that these ILs can be recovered simply by vacuum distillation without a significant decrease in the activity of dearomatization.
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高影响因子
CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Yueyue Li,Yujia Zhai,Bing Fu,Yuanlin He,Ying Feng,Fang Ma,Haojie Lu
Mapping the N-glycome of porcine sperm before and after sperm capacitation is important for understanding the rearrangement of glycoconjugates during capacitation. In this work, we characterized the N-glycome on the membranes of 18 pairs of fresh porcine sperm before capacitation and porcine sperm after capacitation by MALDI-MS (Matrix-assisted laser desorption/ionization-mass spectrometry). A total of 377 N-glycans were detected and a comprehensive N-glycome map of porcine sperm membranes before and after capacitation was generated, which presents the largest N-glycome dataset of porcine sperm cell membranes. Statistical analysis revealed a significantly higher level of high mannose glycosylation and a significantly lower level of fucosylation, galactosylation, and α-2,6-NeuAc after capacitation, which is further verified by flow cytometry and lectin blotting. This research reveals new insights into the relationship between N-glycosylation variations and sperm capacitation, including the underlying mechanisms of the capacitation process.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Yan Cao,Zipeng Xing,Yingcai Shen,Zhenzi Li,Xiaoyan Wu,Xu Yan,Jinlong Zou,Shilin Yang,Wei Zhou
Mesoporous black Ti 3+ /N-TiO 2 spheres with high crystallinity are fabricated by a facile evaporation-induced self-assembly (EISA) method, using urea as nitrogen resource, combined with a mild calcinations (350 °C) after an in-situ hydrogenation under an argon atmosphere. The prepared materials are characterized by X-ray diffraction, Raman, scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. The results indicate the prepared sample is uniform mesoporous black Ti 3+ /N-TiO 2 spheres with high crystallinity of anatase, high surface area of ∼100 m 2 g −1 , large pore size of 6.5 nm and narrow band gap of 2.11 eV, could be easily controlled with the diameter from 200 to 800 nm. Meanwhile, the photoresponse extends to near-infrared region owing to Ti 3+ and N codoping. The visible-light-driven photocatalytic degradation ratio of methyl orange is up to 96% and photocatalytic hydrogen production rate is ∼150 μmol h −1 , which are several times higher than that of pristine TiO 2 . Besides, the possible photocatalytic mechanism is proposed. The excellent photocatalytic activity can be ascribed to N and Ti 3+ doping resulting in high visible light utilization and enhanced separation of photogenerated charge carriers, and the mesoporous networks offering more surface active sites.
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高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2024
·
IF 4.3
Caimin He,Li Li,Ping Yin,Ting Lei
It has been critical and challenging to develop non-precious transition-metal-based eletrocatalysts with low-cost and long-term durability for efficient water splitting. Herein, self-supported nitrogen-doped tungsten carbide on iron-nickel foam (N-WC@INF) with three-dimensional flower-like structure was prepared by a simple hydrothermal reaction followed by simultaneous nitridation and carbonization . The resulting N-WC@INF exhibits an overpotential of 103 mV at a current density of 10 mA cm −2 in alkaline media and a low Tafel slope of 47 mV dec −1 , accompanied by a negligible loss of overpotential after 30 h consecutive hydrogen evolution reaction (HER). Additionally, N-WC@INF shows promising activity for oxygen evolution reaction (OER) with an overpotential of 224 mV at 10 mA cm −2 and a low Tafel slope of 22 mV dec −1 .
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ChemistrySelect
·
2025
·Vol. 10
·期 6
·e202405266
·
IF 2
Boao Du,Lihui Zheng
Graphical This research focuses on supercapacitor electrode materials. Using Rhus typhina leaves as raw materials, it innovatively employs a mixed activator of K 2 CO 3 and ZnCl 2 Through a two-step carbonization-activation method, O/N self-doped TLMPC-x is prepared. Among them, TLMPC-1.0 exhibits outstanding performance, with a large specific surface area, high specific capacitance, and strong cycle stability, demonstrating promising application prospects. This research focuses on the field of supercapacitor electrode materials. Using Rhus typhina leaves as the starting material, it innovatively applies a mixed activator composed of K 2 CO 3 and ZnCl 2 and successfully prepares O/N self-doped leaf-derived porous carbon electrode materials (TLMPC-x) through a precisely controlled two-step carbonization-activation method. The aim is to develop a new type of electrode material that combines excellent performance, environmental friendliness, and the advantage of low cost, and to deeply explore the mechanism of the effect of the activator ratio on the specific surface area and electrochemical performance of the materials. Among them, TLMPC-1.0 remarkably exhibits a specific surface area as high as 2827.9 m 2 g −1 . Its abundant and multi-level pore structure complements well with the diverse heteroatom doping. During the electrochemical performance test in the KOH electrolyte system, the specific capacitance of this material excellently reaches 335.3 F g −1 , and the capacitance retention rate is stably maintained at 69%. When the power density is 250 W kg −1 , an energy density of 9.45 Wh kg −1 can be achieved. Moreover, after 20 000 charge–discharge cycles, its capacitance retention rate is still as high as 96.4%, demonstrating extremely excellent electrochemical performance and ultra-stable cycle stability.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Qi Zhao,Zihan Liu,Ziyue Xu,Bowen Li,Siqi Yang
The real-time and effective detection of n-butanol gas is particularly important in production and daily life due to its flammability, toxicity, and potential hazards to the environment. This article reports the preparation of hollow indium oxide spheres and rGO/In 2 O 3 composites through a simple hydrothermal and subsequent heat treatment method. Test results indicate that the gas sensitivity of n-butanol can be significantly improved through rGO composites. The prepared hollow indium oxide spheres are composed of nanosheets with a diameter of probably 500 nm. After combination by rGO, the specific surface area and the proportion of adsorbed oxygen of the material are increased, both of which are advantageous for enhancing gas sensitivity abilities. At the optimum operating temperature of 160 °C, the response value of rGO/In 2 O 3 complex sensor is 51–50 ppm of n-butanol, which is 3.6 times the response of pure In 2 O 3 . Gas sensors composed of rGO/In 2 O 3 exhibit ultra-fast response time and low detection limit. Even for ppb grade (100 ppb) n-butanol gas, the response value is still 2.3. These characteristics make rGO/In 2 O 3 a promising material for the preparation of high-performance n-butanol gas sensors. Besides, the gas-sensitive mechanism of the enhanced n-butanol sensing performances is also analyzed.
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ACS Applied Energy Materials
·
2025
·
IF 5.5
Jiaxue Gao,Hua Lin,Tianwei Wang,Caicheng Song,Rongwen Lu,Shufen Zhang
Nowadays, supercapacitors as energy storage devices have gradually attracted more attention. In this paper, a tailored “staggered reaction” strategy was employed to synthesize the N/S codoped hollow porous carbon nanospheres as an electrode material for high-performance supercapacitors. This manner features the appropriate involvement of the solvent acetone in the reaction within the system, which enables the sequential reaction process to obtain the core–shell structure with different internal and external compositions. Furthermore, the core could be dissolved by soaking in a formic acid solution, thereby achieving a targeted hollow structure. In addition, in situ doping was achieved by selecting suitable precursors (m-phenylenediamine and 2,4-diaminobenzenesulfonic acid) containing N and S, and the effect of N and S content on performance was investigated in detail. The results reveal that with the increase of N and S content, the specific capacitance of carbon nanospheres first increases and then decreases. Ultimately, the maximum specific capacitances of 398 and 277 F·g–1 were obtained under the current density of 0.2 A·g–1 in a three-electrode system and a two-electrode system, respectively. After 10,000 cycles, the specific capacitance can be basically maintained at 100% with excellent cycling stability.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Tiantian Liu,Jing Li,Xiaorui Yan,Kairui Li,Wenhua Wang,Haisheng Wei
The availability of catalytic sites for contact with reactants is a key issue to improve the performance of a catalyst, where constructing hollow structured nanomaterials has been considered as an effective strategy. Here, an N-doped carbon supported Ru catalyst with an interior cavity was synthesized by etching a MOF-derived core–shell precursor, in which metal Ru can be highly dispersed in the porous shell. This catalyst shows 98.7% conversion and >99% selectivity towards p-chloroaniline in the hydrogenation of p-chloronitrobenzene, which is better than the corresponding supported catalyst. Moreover, it also displays excellent stability with 5 cycle runs and good substrate universality for the hydrogenation of extensive substituted nitroarenes. Various characterization techniques and control experiments reveal the advantage of the unique structure to promote the mass transport and adsorption of reactant molecules on Ru sites. This work provides a novel strategy to design an efficient Ru-based catalyst for chemoselective hydrogenation.
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高影响因子
危险品化学品经营许可证（带存储）