JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 6
·5008-5016
·
IF 2.22
Peng Fang,Wang Shaojie,Yu Weiwei,Huang Tiantian,Sun Yan,Cheng Chuanwei,Chen Xin,Hao Jiaming,Dai Ning
Gas sensors with high performance and low energy consumption are necessary for system integration in the environment monitoring of explosives. High-performance room-temperature hydrogen sulfide (H 2 S) gas sensors were fabricated based on the hybrids of tungsten oxide (WO 3 )/reduced graphene oxide (rGO). WO 3 nanocubes modified with different contents of rGO were synthesized by acid-based hydrothermal method. The optimal amount of rGO in the composite is 5 wt%, at which the room-temperature operating sensor presents the highest sensitivity of approximately 32.7 to 500 ppb H 2 S, a fast recovery time of ~ 180 s, as well as an excellent sensing selectivity. The overall improvement in sensing performances demonstrated an important progress made in H 2 S sensor fabrication for portable and real-time gas detection. The improved gas-sensing performance is attributed to the large specific surface area of the WO 3 nanocubes, the formation of WO 3 /rGO heterojunctions, and the enhanced electron transfer efficiency.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 23
·21154-21167
·
IF 2.22
Yuan Beilei,Li Ning,Liu Jialiang,Xu Fan,Li Chen,Juan Fangying,Yu Huanqin,Li Cuncheng,Cao Bingqiang
Inorganic perovskite cesium lead bromide (CsPbBr 3 ) gets extensive attention due to its superb stability and moisture-tolerance feature. Here, solution-processed CsPbBr 3 perovskite films and their based solar cells were fabricated in ambient condition. The effect of post-annealing on the properties of the CsPbBr 3 film grown and the photoelectric performance of perovskite solar cells (PSCs) have been systematically investigated, which enhances the device power conversion efficiency (PCE) from 2.67 to 5.20%. Moreover, by doping mesoporous TiO 2 (m-TiO 2 ) with reduced graphene oxide (RGO), the PCE of solar cells attained an apparent enhancement and finally improved to 7.08%. Not only high-quality CsPbBr 3 perovskite films but also high-performance mesoporous PSCs were obtained by film post-annealing and electron transport layer (ETL) doping, which were all fabricated in ambient conditions.
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高影响因子
Nanoscale Research Letters
·
2019
·Vol. 14
·期 1
·1-11
·
IF 3.159
Zhou Shiqiang,Chen Mingpeng,Lu Qingjie,Zhang Yumin,Zhang Jin,Li Bo,Wei Haitang,Hu Jicu,Wang Huapeng,Liu Qingju
Formaldehyde (HCHO) is the main source of indoor air pollutant. HCHO sensors are therefore of paramount importance for timely detection in daily life. However, existing sensors do not meet the stringent performance targets, while deactivation due to sensing detection at room temperature, for example, at extremely low concentration of formaldehyde (especially lower than 0.08 ppm), is a widely unsolved problem. Herein, we present the Ag nanoparticles (Ag NPs) sensitized dispersed In 2 O 3 nanograin via a low-fabrication-cost hydrothermal strategy, where the Ag NPs reduces the apparent activation energy for HCHO transporting into and out of the In 2 O 3 nanoparticles, while low concentrations detection at low working temperature is realized. The pristine In 2 O 3 exhibits a sluggish response (R a /R g = 4.14 to 10 ppm) with incomplete recovery to HCHO gas. After Ag functionalization, the 5%Ag-In 2 O 3 sensor shows a dramatically enhanced response (135) with a short response time (102 s) and recovery time (157 s) to 1 ppm HCHO gas at 30 °C, which benefits from the Ag NPs that electronically and chemically sensitize the crystal In 2 O 3 nanograin, greatly enhancing the selectivity and sensitivity.
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PubMed
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2020
·Vol. 325
·期 2
·673-682
·
IF 1.137
Liu Bing,Jia Yongzhong,Jing Yan,Zhang Quanyou,Shao Fei,Yao Ying
Abstract The lithium isotope separation (LIS) plays a vital role in development of nuclear industry. The liquid–liquid extraction technologies open up new possibilities for LIS. This work presents preliminary results of the study on the extractions and separation of 6 Li/ 7 Li by mixed system, comprising amino-derivatives of benzo-15-crown-5 (4AB), ionic liquid and anisole. 4AB was used as an extractant. The eparation factor ( α ) is 1.031 ± 0.001, and abundance of 6 Li in loaded organic phase is 7.76%. Meanwhile, the reason why 4AB has better separation efficiency than B15C5 was explored brief by Fourier transform infrared (FT-IR) spectrum and quantum chemical calculations. Graphic abstract
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高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2019
·Vol. 21
·期 7
·1-16
·
IF 2.009
Li Guiyin,Zeng Junxiang,Zhao Le,Wang Zhihong,Dong Chenyang,Liang Jintao,Zhou Zhide,Huang Yong
Cholesterol is a waxy steroid metabolite substance and plays an important role in the brain, nervous, and immune systems of humans. The level of cholesterol in human serum has become an important index for clinical diagnosis and prevention of cardiovascular disease. In this study, a highly sensitive electrochemical biosensor for cholesterol measurement has been developed based on reduced graphene oxide-chitosan-ferrocene carboxylic acid/platinum nanoparticle (RGO-CS-Fc/Pt NPs) modified screen-printed carbon electrode (SPCE). Under the effect of cholesterol oxidase (CHOD) and cholesterol esterase (CHER), the cholesterol was oxidized to generate hydrogen peroxide (H 2 O 2 ), which can be disintegrated into H 2 O with the synergistic catalysis of RGO-CS-Fc/Pt NPs and produce the redox response current of H 2 O 2 that could be determined by electrochemical amperometric (i-t) method. The prepared cholesterol biosensor was achieved by integrating of the high electrocatalytic efficiency of Pt NPs, high electronic conductivity and large surface area of RGO, the reversible electrochemical behavior of Fc, and good biocompatibility of CS. The measured of redox response current and cholesterol concentration have a good linearity in the range of 0.5–4.0 mg/mL, low detection limit of 5.70 μg/mL (S/N = 3), and good sensitivity of 0.871 nA/mM/cm 2 . Moreover, the RGO-CS-Fc/Pt NPs cholesterol biosensor exhibited excellent specificity, acceptable reproducibility, and higher recoveries in the detection of clinical serum samples, showing great potential for clinical diagnosis.
Schematic presentation of an electrochemical biosensor based on RGO-CS-Fc/Pt NPs for cholesterol detection.
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高影响因子
BIOTECHNOLOGY AND BIOPROCESS ENGINEERING
·
2022
·Vol. 27
·期 3
·443-450
·
IF 3.386
Yang Rong-ling,Chen Xi,Song Yu-ye,Zhu Qian-lin,Bilal Muhammad,Wang Yu,Tong Zheng,Wu Ting-ting,Wang Zhao-yu,Luo Hong-zhen,Zhao Xiang-jie,He Ting-ting
Tyrosinase inhibitors are clinically effective for treating some dermatological disorders related to melanin hyperpigmentation. Accordingly, the discovery and development of tyrosinase inhibitors have great value in the pharmaceutical and cosmetic industry. Here, a novel tyrosinase inhibitor, 6′-O-cinnamoyl-helicid (helicid cinnamylate) was successfully synthesized by a simple and effective biocatalytic approach with Aspergillus oryzae cells. Investigation of the effects of several key variables on helicid cinnamylate synthesis found that the reaction conversion, reaction rate and regioselectivity reached 99%, 9.40 mM/h and > 99%, respectively, at the optimal conditions with anhydrous acetone as the solvent, whole-cell concentration of 40 mg/mL, and the molar ratio of vinyl cinnamate to helicid of 10 at 45°C. The whole-cells retained 68.87% of its initial activity after reusing for seven batches, indicating a potent application potential in non-aqueous biocatalytic systems. It was worth noting that helicid cinnamylate demonstrated a more potent tyrosinase inhibitory activity with an IC 50 value of 3.55 mM than helicid (IC 50 = 4.48 mM) and arbutin (IC 50 = 5.48 mM), which suggest that helicid cinnamylate could be developed as a more potential tyrosinase inhibitor. In conclusion, this study provides a novel whole-cell catalytic approach for the synthesis of helicid cinnamylate and insight into its application as a tyrosinase inhibitor.
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高影响因子
Frontiers of Chemical Science and Engineering
·
2013
·Vol. 7
·期 3
·303-311
·
IF 0
Zhang Hua,Zhu Hongji,Wang Shipeng,Wang Weihua
Response surface method (RSM), based on Box-Behnken design, was used to optimize the enzymatic hydrolysis conditions of flatfish skin protein hydrolysates (FSPH). Among the tested proteases, the combination of nutrase and trypsin was selected. The optimal hydrolysis conditions were as follows: pH 7.3, temperature 51.8°C, and the enzyme/substrate (E/S) ratio 2.5; under these conditions, the maximum peptide yield (PY) was 69.41±0.43%. The physiochemical analysis showed that the amino acids (His, Asp and Glu) of FSPH accounted for 18.15%, and FSPH was a mixture of polypeptides mostly distributed among 900–2000 Da. FSPH could exhibit a 93% chelating effect on ferrous ion at a concentration of 400 μg/mL, and also a notable reducing power. This study showed bioprocess for the production of FSPH for the first time, which had a good potential for valuable ingredients in the food, cosmetic and medicine industries.
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Frontiers of Environmental Science & Engineering
·
2020
·Vol. 14
·期 6
·1-12
·
IF 4.053
Li Wenyue,Chen Min,Zhong Zhaoxiang,Zhou Ming,Xing Weihong
High-concentration industrial wastewater containing N,N -dimethylacetamide (DMAc) from polymeric membrane manufacturer was degraded in Cu 2 O NPs/H 2 O 2 Fenton process. In the membrane-assisted Fenton process DMAc removal rate was up to 98% with 120 min which was increased by 23% over the batch reactor. It was found that ·OH quench time was extended by 20 min and the maximum ·OH productivity was notably88.7% higher at 40 min. The degradation reaction rate constant was enhanced by 2.2 times with membrane dispersion ( k = 0.0349 min −1 ). DMAc initial concentration ( C 0 ) and H 2 O 2 flux ( J p ) had major influence on mass transfer and kinetics, meanwhile, membrane pore size ( r p ) and length ( L m ) also affected the reaction rate. The intensified radical yield, fast mass transfer and nanoparticles high activity all contributed to improve pollutant degradation efficiency. Time-resolved DMAc degradation pathway was analyzed as hydroxylation, demethylation and oxidation leading to the final products of CO 2 , H 2 O and NO 3 − (rather than NH 3 from biodegradation). Continuous process was operated in the dual-membrane configuration with in situ reaction and separation. After five cycling tests, DMAc removal was all above 95% for the initial [DMAc] 0 = 14,000 mg/L in wastewater and stability of the catalyst and the membrane maintained well.
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高影响因子
MICROCHIMICA ACTA
·
2012
·Vol. 179
·期 3
·283-289
·
IF 3.033
Luo Xubiao,Huang Yining,Deng Fang,Luo Shenglian,Zhan Youcai,Shu Hongying,Tu Xinman
We have developed a convenient, selective and reliable method for the rapid enrichment of trace quantities of Cu(II) by using a magnetic Cu(II) ion-imprinted polymer. This is followed by their determination by FAAS. The imprints were prepared by using (a) Cu(II) ions as the template, (b) 3-aminopropyltriethoxysilane as both the functional monomer and the crosslinking agent, and (c) Fe 3 O 4 as the magnetic component. Enrichment is carried out in a single step, and adsorbed copper ions can be separated from the sample solution by applying a strong magnet. The effects of pH, elution condition, amount of imprint, and of potentially interfering ions were evaluated. Under the optimal conditions, the detection limit and enrichment factor are 0.3 μg L −1 and 100, respectively, and the recovery is >95 %. The procedure was successfully applied in the enrichment and detection of trace copper ions in environmental water.
General procedure for preconcentration/recovery of Cu (II) ions
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高影响因子
Frontiers of Materials Science
·
2021
·Vol. 15
·期 2
·241-252
·
IF 2.765
Du Yan,Niu Ziwen,Yan Tingjiang,Zhu Kunlei,Yu Yang,Jing Zhihong
Carbon-molybdenum disulfide (C-MoS 2 ) ultrathin nanosheets were prepared by a hydrothermal process, and then AgI/C-MoS 2 were synthesized via an in-situ deposition method. This ternary heterojunction composite exhibited better photocatalytic activity compared with those of one-component (pristine MoS 2 ) and bicomponent (AgI/MoS 2 and C-MoS 2 ) materials for the degradation of organic dyes under the visible-light irradiation. In particular, by comparing with AgI/MoS 2 , the significant role of conductive amorphous carbon in AgI/C-MoS 2 in enhancing the charge transfer during the photocatalytic degradation of dyes was first confirmed by photocurrent response and electrochemical impedance spectroscopy (EIS). A possible photocatalytic mechanism was proposed based on the capture experiment results. Furthermore, a straightforward and interesting way had been applied to test the recycled/newly-prepared AgI/C-MoS 2 composite for revealing its distinctive self-cleaning performance and recyclability characteristic besides its good photocatalytic activity. This work could provide a reference for the design of other new ternary heterojunction composite materials with special structures and properties.
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高影响因子
JOURNAL OF CHEMICAL SCIENCES
·
2015
·Vol. 127
·期 6
·1053-1056
·
IF 1.191
ZHANG FEI-BAO,LV SU-FANG,JIANG JIANG-XIONG,NI YONG
Dithienogermole-diphthalimide, a new molecule, and dithienogermole-dithiadiazole alternate polymers were synthesized by the solvothermal method. Optical properties and molecular weight were investigated by UV–Vis absorption spectroscopy and Gel Permeation Chromatography. Compared with the results achieved by the previously reported normal heating method, these polymers reported here exhibited similar optical properties and possess higher molecular weight.
Synthesis and characterization of a new dithienogermole-diphthalimide and dithienogermole-dithiadiazole alternate polymers via the solvothermal method is reported.
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高影响因子
Frontiers of Chemical Science and Engineering
·
2021
·Vol. 16
·期 4
·484-497
·
IF 4.204
Yang Jinian,Feng Xuesong,Nie Shibin,Xu Yuxuan,Li Zhenyu
The nanocomposites of flower-like nickel phyllosilicate particles incorporated into epoxy resin were fabricated via an in-situ mixing process. The flower-like nickel phyllosilicate particles were firstly synthesized using a mild self-sacrificial templating method, and the morphology and lamellar structure were examined carefully. Several properties of mechanical, thermal and tribological responses of epoxy nanocomposites were performed. It was demonstrated that adequate flower-like nickel phyllosilicate particles dispersed well in the matrix, and the nanocomposites displayed enhanced tensile strength and elastic modulus but decreased elongation at break as expected. In addition, friction coefficient and wear rate were increased first and then decreased along with the particle content, and showed the lowest values at a mass fraction of 5%. Nevertheless, the incorporated flower-like nickel phyllosilicate particles resulted in the continuously increasing thermal stability of epoxy resin (EP) nanocomposites. This study revealed the giant potential of flower-like particles in preparing high-quality EP nanocomposites.
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高影响因子
危险品化学品经营许可证（带存储）