SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Huiqiang Wang,Zhanfang Ma
A new strategy for signal amplification was introduced in a label-free amperometric immunoassay platform. Improvements in the signal occurred following the oxidation of glucose by glucose oxidase and catalysis by polythionine of the produced H 2 O 2 from the previous oxidation reaction. In addition, a multifunctional conductive hydrogel, polypyrrole-polythionine-gold with glucose oxidase , was synthesised with a one-pot method using pyrrole and thionine as monomers, ammonium persulfate and HAuCl 4 as co-oxidant agents, and glucose oxidase as the doping agent. Combined with the hydrogel, a label-free amperometric immunoassay for the tumour marker neuron-specific enolase (NSE) was obtained. If operated at 0 V (vs. Ag/AgCl), the sensor exhibited a wide liner range from 100 ng mL −1 to 1 pg mL −1 and ultralow detection limit of 0.65 pg mL −1 (S/N = 3). The presented method was further used for the analysis of human serum samples and showed good consistency with detection results from an electrochemiluminescence immunoassay.
研究领域:
肿瘤学
·
免疫学
·
生物传感器
·
分子诊断
·
转化医学
·
临床检验医学
·
纳米生物技术
✓ 已验证
DOI
高影响因子
Small
·
2019
·Vol. 15
·期 48
·1901527
·
IF 10.856
Zhaofeng Zhai,Bing Leng,Nianjun Yang,Bing Yang,Lusheng Liu,Nan Huang,Xin Jiang
Tremendous demands for highly sensitive and selective nonenzymatic electrochemical biosensors have motivated intensive research on advanced electrode materials with high electrocatalytic activity. Herein, the 3D-networked CuO@carbon nanowalls/diamond (C/D) architecture is rationally designed, and it demonstrates wide linear range (0.5 × 10 −6 –4 × 10 −3 m ), high sensitivity (1650 µA cm −2 m m −1 ), and low detection limit (0.5 × 10 −6 m ), together with high selectivity, great long-term stability, and good reproducibility in glucose determination. The outstanding performance of the CuO@C/D electrode can be ascribed to the synergistic effect coming from high-electrocatalytic-activity CuO nanoparticles and 3D-networked conductive C/D film. The C/D film is composed of carbon nanowalls and diamond nanoplatelets; and owing to the large surface area, accessible open surfaces, and high electrical conduction, it works as an excellent transducer, greatly accelerating the mass- and charge-transport kinetics of electrocatalytic reaction on the CuO biorecognition element. Besides, the vertical aligned diamond nanoplatelet scaffolds could improve structural and mechanical stability of the designed electrode in long-term performance. The excellent CuO@C/D electrode promises potential application in practical glucose detection, and the strategy proposed here can also be extended to construct other biorecognition elements on the 3D-networked conductive C/D transducer for various high-performance nonenzymatic electrochemical biosensors.
研究领域:
生物医学工程
·
纳米医学
·
电化学传感
·
生物传感器
·
材料科学
·
分子诊断
·
转化医学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2014
·Vol. 5
·期 8
·5604-5610
·
IF 3.708
Mei Yu,Jindan Zhang,Songmei Li,Yanbing Meng,Jianhua Liu
The performances of photovoltaic devices can be improved by increasing light-harvesting and charge collection respectively. The design and synthesis of nanocomposites with the ability of enhancing the generation and collection of the photo-generated electrons provide a significant way to improve the power conversion efficiency (PCE). Herein, SWNTs@(TiO2/Ag/Au) nanocomposites were synthesized and successfully integrated into photoanode films of dye-sensitized solar cells (DSSCs) to improve the power conversion efficiency. The synthesis processes were based on multi-functional DNA. DNA not only works as a dispersing agent preventing SWNTs bundling but also as a sacrificial mold assembling TiO2, Ag and Au nanoparticles on the surface of the SWNTs. The synthesized SWNTs@(TiO2/Ag/Au) nanocomposites enhance the charge collection and light-harvesting of DSSCs simultaneously. With 2.45 wt% SWNTs@(TiO2/Ag/Au) nanocomposites incorporating into the photoanode films, the PCE of the DSSCs increases from 6.8% to 8.3%.
研究领域:
材料科学
·
纳米科技
·
能源化学
·
光伏器件
·
表面科学
·
胶体与界面化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 139
·期 1
·51418
·
IF 3.125
Lan Hao,Xulin Cui,Xiaoli Wu,Jingtao Wang,Yifan Li,Wenpeng Li,Xingzhong Cao,Haoqin Zhang
Efficient separation of aromatic-aliphatic hydrocarbon mixtures has long been an important topic in chemical industries. Organic nanofiltration (OSN) has been revealing great promise in separating solvent mixtures that has not been effectively resolved by the state-of-the-art technologies. Herein, novel OSN membranes are designed for the separation of toluene and n -heptane. Polyamide active layer with diaminonaphthalene as the aqueous phase monomer is prepared by interfacial polymerization for the first time. The addition of polydimethylsiloxane gutter layer, as well as the combination of spin coating technique and macroporous substrate, renders the membranes with loose and defect-free architectures. The as-designed membranes achieve a rather high selectivity of toluene over n -heptane (>4) together with ultra-high toluene permeance (>180 L m −2 h −1 bar −1 ). These membranes also present excellent stability in the long-term operation.
研究领域:
材料科学
·
膜分离技术
·
化学工程
·
纳米技术
·
高分子化学
·
工业催化
·
绿色化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2016
·
IF 5.557
Jiayou Liao,Zhi Wang,Ming Wang,Chengyun Gao,Song Zhao,Jixiao Wang,Shichang Wang
An ion-exchange material – Poly(diallyldimethylammonium carbonate) (PDDACA) containing mobile carbonate has been prepared and it has been blended in a fixed carrier membrane material – polyvinylamine (PVAm) containing abundant amine-group to adjust the carrier microenvironment of the fixed carrier membrane. It makes the mobile carrier cruise around the fixed carrier. On one hand, the CO 2 can be transported continuously in the swing area of fixed carrier through the mobile carriers, the passivity of fixed carrier can be overcome and the utilization efficiency of fixed carrier can be enhanced. On the other hand, a loose and low crystalline system will be obtained by blending two polymers, the number of effective mobile carrier will be increased with mobile carriers unlocking from the crystalline area, and the loose and low crystalline system will provide a good environment for the movement of mobile carriers. These are conducive to enhance the performance of blend membrane in comparision with single polymer membrane. The CO 2 permeance and CO 2 /N 2 selectivity of PVAm-PDDACA membrane, which concurrently contains fixed amine carriers and movable carbonate carriers, can reach 909 GPU and 102 at 0.11 MPa, respectively. The performance of PVAm-PDDACA membrane is enhanced obviously in comparision with PVAm membrane and PDDACA membrane.
研究领域:
膜科学与技术
·
气体分离
·
高分子材料
·
化学工程
·
环境化工
·
能源材料
·
功能材料
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 2
·期 37
·15546-15552
·
IF 0
Yitan Li,Lin Wei,Cuncun Wu,Chang Liu,Yanxue Chen,Hong Liu,Jun Jiao,Liangmo Mei
Uniform zinc oxide (ZnO) nanosheet arrays were grown on woven titanium wires using a low temperature hydrothermal method. Photoanodes were prepared by depositing CdS and CdSe quantum dots onto the ZnO nanosheet arrays by a successive ionic layer adsorption and reaction (SILAR) method. Solar cells were assembled using these nanostructured photoanodes and their photovoltaic performance was characterized. The effect of using SILAR cycles for the deposition of quantum dots on the performance of these nanostructured solar cells was investigated systematically. The overall light-to-electricity conversion efficiency of 0.98% was achieved under 100 mW cm−2 illumination for flexible CdS/CdSe co-sensitized solar cells using conventional Pt foils as counter electrodes. To further improve the performance of the flexible solar cells, PbS and Cu2S counter electrodes based on Pb and Cu foils were fabricated. The best conversion efficiencies of flexible CdS/CdSe co-sensitized solar cells using Cu2S and PbS counter electrodes were 3.4% and 2.5%, which demonstrated a significant enhancement in values for short circuit current, open circuit voltage, and fill factor compared to those obtained with the commonly used Pt and Au electrodes.
研究领域:
材料科学
·
纳米科技
·
能源材料
·
光电化学
·
半导体器件
✓ 已验证
DOI
CHROMATOGRAPHIA
·
2018
·Vol. 82
·期 3
·683-693
·
IF 1.401
Shen Chen,Wu Tong,Zang Xiaohuan
In this work, a zeolitic imidazolate framework-based graphene oxide composite (ZIF-8@GO) was prepared and used as the adsorbent in hollow fiber stir bar sorptive extraction. The stir bar was constructed of a small section of hollow fiber filled with 5 mg ZIF-8@GO and a thin stainless wire of 1.5 cm long in its lumen, and used to extract the trace levels of phthalate esters from children’s food samples prior to gas chromatography–mass spectrometric detection. The ZIF-8@GO showed a high adsorption efficiency for the compounds containing aromatic rings. The main experimental parameters that can impact the extraction efficiency including extraction temperature, extraction time, stirring rate, sample salinity, and desorption conditions were investigated. Under the optimized conditions, the limits of detection (LODs) for the five phthalate esters (diethyl phthalate, dipropyl phthalate, diisobutyl phthalate, butylbenzyl phthalate, and di(2-ethylhexyl) phthalate) were 0.15–0.6 µg L −1 for CiCi beverage and pear juice samples, and 0.75–2.2 µg kg −1 for jam samples. The limits of quantitation (LOQs) were 0.5–2.0 µg L −1 for CiCi beverage and pear juice samples, and 2.5–7.5 µg kg −1 for jam samples. Wide linear ranges of 0.5–500.0 µg L −1 and 2.5–2000 µg kg −1 were obtained for CiCi beverage, pear juice samples and jam samples, respectively, with good repeatability (RSD < 11%) and high method recoveries (72%–100%). The lifetime test results showed that the ZIF-8@GO-based hollow fiber stir bar can be reused for 120 extraction cycles without a significant loss of extraction efficiency, indicating its high durability and stability. The established method was applied successfully for the determination of the phthalate esters (PAEs) in children’s food samples. Graphical abstract
研究领域:
分析化学
·
食品安全
·
环境毒理学
·
暴露科学
·
食品化学
·
污染物检测
✓ 已验证
DOI
高影响因子
APPLIED ENERGY
·
2024
·
IF 10.1
Yaning Kong,Honglin Yu,Mengqi Liu,Guodong Zhang,Fei Wang
Hydrate was considered to be the next generation hydrogen storage material , and hydrate-based hydrogen storage (HBHS) would play an important role in future hydrogen economy, but sluggish hydrate formation kinetics presents huge technological challenge for its application. Herein, a nano promoter of -SO 3 − @PSNS was prepared by soap-free emulsion polymerization , and a dual kinetic promoter system (L-methionine/-SO 3 − @PSNS) was applied to enhance the formation kinetics of mixed H 2 /DIOX hydrate. At a moderate condition (12 MPa and 274.15 K), hydration efficiency under a driving force of 2.1 MPa is significantly enhanced by the synergy of the dual kinetic promoters, hydrate induction time reduces from 443.2 ± 209.73 min to 24.7 ± 17.16 min, while hydrate growth rate increases by 43.75%, and hydrogen storage capacity is up to 0.473 ± 0.041 wt% that increases by 62.8%. At a more moderate condition (10 MPa and 274.15 K) with an extremely low driving force of 0.1 MPa, enhanced hydrate formation was obtained in a composite promotion system of the dual kinetic promoters and dual thermodynamic promoters (THF/DIOX), which also performs exceptionally in term of recycling. The presence of a small amount (0.35 mol%) of THF reduces the induction time by 93.5%, and hydrate growth rate increases by 130.18%, while satisfactory hydrogen storage capacity (0.346 ± 0.017 g/g) is still remained in mixed H 2 /DIOX/THF hydrate, the structure of which was confirmed by Raman spectrum . This work presents an effect approach on enhancing the formation kinetics of H 2 -contained hydrate under low driving force, and this finding provides important insight for HBHS.
研究领域:
物理化学
·
能源材料
·
气体储存
·
化学工程
·
纳米材料科学
·
分子模拟
·
可持续能源
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2013
·
IF 4.675
Ying Yang,Pengfei Yi,Conghua Zhou,Jiarui Cui,Xiaolu Zheng,Si Xiao,Xueyi Guo,Wenyong Wang
In this work we investigate novel, agarose-based polymer electrolyte that is modified by magnetic NiO nanoparticles for solid-state dye-sensitized solar cells (DSSCs) applications. After proper treatment under an external magnetic field , the agarose electrolyte exhibits increased ionic conductivity and better penetration into the mesoporous TiO 2 photoanode film, which improves the power conversion efficiency of the DSSCs. Electrochemical impedance spectroscopy measurement is also performed to analyze the magnetic field effect on cell performance. After applying proper magnetic filed intensity, the recombination resistance and redox transport resistance in the devices are improved. This method can be possibly applied to other solid-state electrolyte materials to improve their performance and can lead to more efficient DSSCs.
研究领域:
材料科学
·
能源化学
·
纳米科技
·
光电功能材料
·
可再生能源
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Zhengwu Wang,Yannan Zhang,Bao Zhang,Dong Yang,Kai Zhou,Yixue Huang,Fei Wang,Jianguo Duan,Xianshu Wang,Peng Dong,Yingjie Zhang
Spinel LiNi 0.5 Mn 1.5 O 4 (LNMO) has gained significant attention as a promising cathode material for lithium-ion batteries due to its high working voltage (>4.7 V) and energy density . However, challenges such as electrolyte decomposition-induced material interface erosion and transition metal dissolution under high operating voltage hinder its commercial use. In this study, a thin and uniform Sm 2 O 3 layer has been successfully deposited on the surface of LNMO using a wet chemical method . A comprehensive investigation of surface morphology , crystal structure, and electrochemical performance of the modified LNMO is conducted. The results demonstrate that the Sm 2 O 3 surface modification acts as a robust multifunctional protective layer, effectively shielding against hydrofluoric acid-induced chemical attack and enhancing the migration efficiency of lithium ions . Notably, the capacity retention rate of LNMO@Sm 2 O 3 (3 wt%) remains up to 88 % after 280 cycles, significantly surpassing the uncoated counterpart. The coated material exhibits a capacity of 114 mAh g −1 even under 10 C rate conditions. Moreover, the AC impedance values and manganese dissolution of the modified material in the organic electrolyte are considerably lower than those of the uncoated counterpart. Theoretical calculations strongly support the experimental findings, revealing higher Mn vacancy formation energy and density of states at the Fermi energy level for the Sm 2 O 3 -modified electrodes. This research contributes to the field of surface modification and paves the way for further enhancements in the electrochemical performance of other high-voltage manganese-based lithium-ion batteries (LIBs).
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
纳米技术
·
表面工程
·
锂电池
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·Vol. 47
·期 33
·14916-14929
·
IF 7.139
Hongzhi Wang,Chunxiao Wang,Weiguo Zhang,Suwei Yao
Developing non-noble metal catalysts with excellent electrocatalytic performance and stability is of great significance to hydrogen production by water electrolysis, but there are still problems of low activity, complex preparation and high cost. Herein, we fabricated a novel Ni 3 S 2 /Ni(OH) 2 dual-functional electrocatalyst by a one-step fast electrodeposition on nickel foam (NF). While maintaining the electrocatalytic performance of Ni 3 S 2 , the existence of heterostructure and Ni(OH) 2 co-catalyst function greatly improves the overall water splitting performance of Ni 3 S 2 /Ni(OH) 2 –NF. Hence, It shows a low overpotential of 66 mV at 10 mA cm −2 for HER and 249 mV at 20 mA cm −2 for OER. The dual-functional electrocatalyst needs only 1.58 V at 20 mA cm −2 when assembled two-electrode electrolytic cell. Impressively, the electrocatalyst also shows outstanding catalytic stability for about 800 h when 20 and 50 mA cm −2 constant current was applied, respectively which demonstrates a potential electrocatalyst for overall water splitting.
研究领域:
材料科学
·
电化学
·
能源催化
·
纳米材料
·
可持续能源
·
功能材料
·
界面化学
✓ 已验证
DOI
高影响因子
CEMENT & CONCRETE COMPOSITES
·
2022
·
IF 9.93
Xing Ming,Qing Liu,Miaomiao Wang,Yongqing Cai,Binmeng Chen,Zongjin Li
Chloride-induced corrosion in reinforced concrete is a primary durability issue that causes large economic loss every year. To improve the intrinsic chloride binding capacity and realize a favorable corrosion protection of cement-based materials are thus crucial to prolong the service life of concrete structures. Here, alumina nano particles (ANPs) were incorporated to improve the chloride binding capacity of cement pastes in chloride solutions and the anti-corrosion performance of mortars under accelerated corrosion process. The ANPs facilitated the formation of alumino-ferrite-mono (AFm)-type phases, thereby improved the content of chemically bound chlorides. Solution calcium (Ca) ions benefited the chloride captured by calcium-(alumino-)silicate-hydrates (C-(A-)S-H) in the assistance of ANPs, especially at high initial chloride concentrations , and further evoked a pH-related chloride binding response. Moreover, the enhanced corrosion resistance was finally realized by incorporating appropriate amount of ANPs because of the filling and chemical effects induced low permeability of mortars. In general, the ANPs possess dual functions in the aspects of chloride binding and corrosion inhibition . These findings are expected to advance the design of high-durable cement-based materials serviced in the marine environment.
研究领域:
建筑材料
·
土木工程材料
·
腐蚀科学
·
纳米材料应用
·
混凝土耐久性
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）