SOLAR ENERGY
·
2016
·
IF 3.685
Haifeng Yang,Jincheng Zhang,Chunfu Zhang,Jingjing Chang,Zhenhua Lin,Dazheng Chen,Xu Sun,He Xi,Genquan Han,Yue Hao
In this work, we demonstrated a high performance planar heterojunction perovskite solar cell with the polyethylenimine ethoxylated (PEIE) interlayer. By adopting a less polar solvent for PEIE, enhanced device performance and uniformity are achieved. The power conversion efficiency (PCE) of the best device increases by 22% compared to the reference device and reaches 14.82% with J SC of 19.45 mA/cm 2 , V OC of 1.00 V, and FF of 76.31% under AM 1.5G 100 mW/cm 2 light illumination. The UPS measurement shows that the PEIE layer can effectively decrease the energy offset between PCBM and metal electrode. The recombination mechanism was explored by measuring V OC and J SC at various light intensities from 100 to 0.1 mW/cm 2 . It shows that the PEIE layer can suppress the trap-assisted recombination for the devices. The enhancement of the probability of the carriers collection also shows that the recombination is reduced by the PEIE interlayer. Moreover, it is found PEIE layer can improve the stability of the device.
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DOI
高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 30
·9167-9174
·
IF 6.641
Chong Li,Baojun Ding,Lijing Zhang,Kepeng Song,Shengyang Tao
Organometal halide perovskite nanocrystals have received extensive attention as a high-performance photoelectric conversion material. However, the perovskite nanocrystals prepared by the traditional batch reactor have uncontrollable size and optical properties, low utilization of raw materials, and complicated purification treatment. In this paper, a flow microreactor is designed with the assistance of finite element analysis and realized the continuous synthesis of CH3NH3PbX3 nanocrystals with a 100% yield. The average size of the prepared nanocrystalline grains is as low as 3.9 nm without any purification step. The prepared nanocrystals have narrow-band emission characteristics (the full width at half-maximum is down to 18 nm), and the quantum yield can reach 76.9%. It is also possible to prepare CH3NH3PbX3 (X = Br, I) nanocrystals covering different emission wavelengths in the visible light region by this method. The coating of a polystyrene film improved the stability of the perovskite nanocrystals. The flexible hybrid film is applied to modify a LED device, and a white LED luminescence spectrum is obtained.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yuhua Zhen,Xinyu Cai,Wenjie Yang,Yuanyue Qie,Jiahao Li,Gaohui Ren,Wei Xing,Qingzhong Xue,Hongxia Geng
Sulfide solid electrolytes (SSEs) are promising materials for developing safe and high-performance all-solid-state lithium batteries (ASSLBs). However, enhancing the ionic conductivity, air stability, and electrolyte/electrode interface compatibility of vulcanized solid electrolytes simultaneously remains a significant challenge. Here, we propose a dual doping strategy (In 2 S 3 and LiI) based on liquid-phase method for the preparation of SSEs. In 2 S 3 and LiI can widen the Li + diffusion pathways and enhance the ionic conductivity. Meanwhile, In 2 S 3 can enhance the (electro)chemical stability and suppress the formation of lithium dendrites and H 2 S. Consequently, the prepared Li 7 P 2.94 In 0.1 S 10.9375 I 0.125 (LPInSI) solid electrolyte exhibited high ionic conductivity (2 mS·cm −1 ), excellent electrochemical stability, and air stability at 25 ℃. Based on this, ASSLBs fabricated with Li-In alloy anodes enhance the compatibility of the electrolyte/electrode interface, deliver a discharge capacity of 165.2 mAh·g −1 at room temperature, and retain 87.6 % of the specific discharge capacity after 300 cycles at 0.2 C. This study offers a viable approach for the synthesis of practical SSEs and high-performance ASSLBs.
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产品关联
DOI
高影响因子
PLoS One
·
2020
·Vol. 15
·期 10
·e0240920
·
IF 2.74
Li-Wei Gao,Hong-Tao Zhu,Cai-Yun Liu,Zhi-Xiang Lv,Xiao-Man Fan,Ye-Wang Zhang
As one of the most extensively studied glycosaminoglycan lyases, heparinase I has been used in producing low or ultra-low molecular weight heparin. Its’ important applications are to neutralize the heparin in human blood and analyze heparin structure in the clinic. However, the low productivity and activity of the enzyme have greatly hindered its applications. In this study, a novel Hep-I from Bacteroides cellulosilyticus (BcHep-I) was successfully cloned and heterologously expressed in E . coli BL21 (DE3) as a soluble protein. The molecular mass and isoelectric point (pI) of the enzyme are 44.42 kDa and 9.02, respectively. And the characterization of BcHep-I after purified with Ni-NTA affinity chromatography suggested that it is a mesophilic enzyme. BcHep-I can be activated by 1 mM Ca 2+ , Mg 2+ , and Mn 2+ , while severely inhibited by Zn 2+ , Co 2+ , and EDTA. The specific activity of the enzyme was 738.3 U·mg -1 which is the highest activity ever reported. The K m and V max were calculated as 0.17 mg·mL -1 and 740.58 U·mg -1 , respectively. Besides, the half-life of 300 min at 30°C showed BcHep-I has practical applications. Homology modeling and substrate docking revealed that Gln15, Lys74, Arg76, Lys104, Arg149, Gln208, Tyr336, Tyr342, and Lys338 were mainly involved in the substrate binding of Hep-I, and 11 hydrogen bonds were formed between heparin and the enzyme. These results indicated that BcHep-I with high activity has great potential applications in the industrial production of heparin, especially in the clinic to neutralize heparin.
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PubMed
高影响因子
TALANTA
·
2020
·
IF 5.339
Shimeles Addisu Kitte,Terefe Tafese,Chen Xu,Muhammad Saqib,Haijuan Li,Yongdong Jin
The development of highly sensitive electrochemiluminescence (ECL) immunosensors by using functional nanoparticles as signal amplifiers is a solution towards sensitive determination of many low concentration disease biomarkers. Herein, a sensitive aptamer-based, sandwich-type surface plasmon enhanced electrochemiluminescence (SPEECL) immunosensor was demonstrated for the detection of cardiac troponin I (cTnI), by means of aptamer conjugated CdS QDs and AuNPs as ECL luminophores and plasmon sources, respectively, in which Tro4 aptamer was used as a capture probe for cTnI and Tro6 aptamer as a detecting probe. The signal of the developed SPEECL system showed ~ 5-fold increment as compared to that of without AuNPs. Using this ECL platform for the detection of cTnI, a linear range and the limit of detection (LOD) were found to be 1 fg/mL - 10 ng/mL and 0.75 fg/mL, respectively.
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DOI
PubMed
高影响因子
Frontiers in Pharmacology
·
2020
·
IF 4.225
Zhang Jiaqi,Liang Xiaoqiang,Li Jiacheng,Yin Hao,Liu Fangchen,Hu Cheng,Li Ling
Overuse of acetaminophen (APAP) is a major cause of drug-induced liver failure at the clinics. Apigenin (API) is a natural flavonoid derived from Matricaria chamomilla. The aim of the present study was to investigate the amelioration function of API in APAP-induced hepatotoxicity both in vitro and in vivo and investigate its potential mechanisms. Analysis results of the activities of serum alanine and aspartate aminotransferases (ALT and AST), malondialdehyde, myeloperoxidase (MPO), and reactive oxygen species (ROS) demonstrated therapeutic effects of API. MTT assay results revealed that API attenuated APAP and its metabolic product, N-acetyl-p-benzoquinone imine (NAPQI) induced cytotoxicity in a dose-dependent manner in human liver cells, L-02 cells. Subsequently, metabolomic results of cells and serum analyses demonstrated an aberrant level of carnitine palmitoyltransferase I (CPT1A). We established that API stimulated CPT1A activity in mice liver tissues and L-02 cells. Molecular docking analyses revealed potential interaction of API with CPT1A. Further investigation of the role of CPT1A in L0-2 cells revealed that API reversed cytotoxicity via the AMP-activated protein kinase (AMPK)/GSK-3β signaling pathway and compound C, which is a selective AMPK inhibitor, inhibited activation of CPT1A induced by API. API was bound to the catalytic region of AMPK as indicated by molecular docking results. In addition, compound C suppressed nuclear translocation of nuclear factor erythroid 2–related factor 2 (NRF2) that is enhanced by API and inhibited the antioxidative function of API. In summary, the study demonstrates that API attenuates APAP-induced hepatotoxicity by activating the AMPK/GSK-3β signaling pathway, which subsequently promotes CPT1A activity and activates the NRF2 antioxidant pathway.
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DOI
PubMed
高影响因子
Journal of the American Chemical Society
·
2020
·
IF 14.612
Xianju Zhang,Xianxin Wu,Xiaoyu Liu,Gaoyu Chen,Yongkai Wang,Jianchun Bao,Xiangxing Xu,Xinfeng Liu,Qi Zhang,Kehan Yu,Wei Wei,Jingjing Liu,Jun Xu,Hua Jiang,Peng Wang,Xun Wang
Perovskite and chalcogenide quantum dots (QDs) are important nano semiconductors. It has been a challenge to synthesize heterostructural QDs combining perovskite and chalcogenide with tailorable photoelectronic properties. In this report, heterostructural CsPbX3-PbS (X = Cl, Br, I) QDs were successfully synthesized via a room temperature in situ transformation route. The CsPbX3-PbS QDs show a tunable dual emission feature with the visible and near-infrared (NIR) photoluminescence (PL) corresponding to CsPbX3 and PbS, respectively. Typically, the formation and evolution of the heterostructural CsPbBr3–PbS QDs with reaction time was investigated. Femtosecond transient absorption spectroscopy (TAS) was applied to illuminate the exciton dynamics in CsPbBr3–PbS QDs. The mild synthetic method and TAS proved perovskite to PbS energy transfer may pave the way toward highly efficient QD photovoltaic and optoelectronic devices.
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高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2019
·
IF 3.858
Fei Li,Jie Gao,XiaoXuan Li,Yijun Li,Xiwen He,Langxing Chen,Yukui Zhang
In this work, we presented the preparation of magnetic carbon nanotubes (MCNTs) functionalized with molecularly imprinted polymers (MIPs) for effective removal of aristolochic acid I (AAI) in traditional Chinese medicine (TCM). MCNTs@AAI-MIPs was obtained via a facile and environmental friendly sol-gel process. Firstly, MCNTs were synthesized by a solvothermal method. Then, the template molecules were self-assembled with the functional monomer phenyltrimethoxysilane (PTMOS) in the presence of ethanol and water. Finally, AAI-MIPs film was coated on the MCNTs to obtain product MCNTs@AAI-MIPs using tetraethyl-orthosilicate (TEOS) as cross-linker. The morphology and structure of prepared MIPs were characterized by Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), X-ray diffraction (XRD), nitrogen gas adsorption and vibrating sample magnetometer (VSM). The adsorption properties were demonstrated by kinetic, isothermal and selective adsorption experiments. The results showed that the imprinted nanocomposites exhibited fast separation rate (10 s), high adsorption capacity (18.54 μg∙mg −1 ), short kinetic equilibrium time (15 min), and good selectivity to template molecule with imprinting factor (IF) of 3.17. A regression equation (y=57294x-4734.1) with good linearity was obtained in the concentration range of 0.1–200 μg∙mg −1 for AAI with a correlation coefficient (R 2 ) of 0.9998. The limit of detection (LOD, S/N=3) was 0.034 μg∙mg -1 . Moreover, high recoveries ranged from 80% to 110% (RSD=3.27%-8.16%) were received in spiked TCM samples. The results suggested that the proposed MCNTs@AAI-MIPs could efficiently and specifically capture AAI from an actual complex TCM samples.
研究领域:
材料科学
·
环境科学
·
药物分析
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高影响因子
Advanced Sensor Research
·
2024
·
IF 0
Zhichao Yu,Di Wu,Yuan Gao,Yunsen Wang,Yongyi Zeng,Dianping Tang,Xiaolong Liu
Early intervention in acute myocardial infarction can minimize myocardial damage and improve patient survival. Herein, a low-cost device-free portable immunobiosensing platform for flexible monitoring of immediate myocardial infarction is reported. CuS-Pt nanofragments (CuS-Pt NFs) with high photothermal conversion efficiency (≈26.41%) are synthesized by liquid-phase polarity-mediated synthesis. The CuS NFs are loaded in situ with platinum (Pt) nanoreactors using a solvothermal reduction strategy, which is employed to enhance the efficiency of gas production. The resulting CuS-Pt nanocatalysts are encapsulated within liposomes for signal cascade amplification. Specifically, cardiac troponin I (cTn I), a target biomarker in serum, is captured on pre-modified microtiter plates and formed into a classical sandwich model. The thermo-chemically kinetically enhanced CuS-Pt reactor is released through a one-step chemical treatment and transferred to a closed gas generator. Under the excitation of a near-infrared laser emitter, the internal pressure in the gas generator device increases with time and drives the carbon quantum dot solution in the connected hose. The moving distance shows a correlation with the target concentration. This work provides a new implementation for the development of low-cost, efficient pressure immunosensors without the requirement of a readout device.
研究领域:
生物医学工程
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心脏病学
·
纳米技术
·
生物传感技术
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DOI
Advances in Experimental Medicine and Biology
·
2016
·
IF 1.953
Yan Heping,Chen Yashun,Zhang Jucheng,Liu Wei,Chen Rui
The first derivatives of gelatin and type I collagen fluorescence spectra were characterized in order to describe the effect of free radicals on pyridinoline (PYD) cross-links. The different gas saturation conditions were used to investigate the effect of different free radicals. An analysis of first derivative fluorescence spectra suggests that PYD cross-link fluorescence emission is composed of three peaks in gelatin, but only two in type I collagen. The PYD cross-link was photo-degraded more than other gases in the presence of O 2 . This suggests that the singlet oxygen ( 1 O 2 ) plays a key role when using photodynamic therapy to treat skin fibrosis disease with Hypocrellin B (HB).
研究领域:
光生物学
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皮肤科学
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分子生物学
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结缔组织病
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自由基化学
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光动力学
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纤维化疾病
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DOI
高影响因子
CHEMICAL PHYSICS
·
2020
·
IF 1.771
Yuejun Li,Tieping Cao,Zemin Mei,Xiaoping Li,Dawei Sun
Among tremendous efforts for enhanced photocatalysis, construction of heterojunction has been deemed as an effective means. In comparison with type II heterojunction, type I heterojunction receives less attention due to accumulation and increased recombination of charge carriers in one side of heterojunction. Herein, we take NaBi(MoO 4 ) 2 /Bi 2 MoO 6 as an example of type I heterojunction and explore means to improve the photocatalytic performance of NaBi(MoO 4 ) 2 /Bi 2 MoO 6 heterojunction. We employ TiO 2 electrospun nanofibers as substrates and separately grow NaBi(MoO 4 ) 2 and Bi 2 MoO 6 nanostructures on the skeleton of TiO 2 . The characterization results show that TiO 2 changes type I heterojunction into multiheterojunction integrating two type II heterojunctions. Photocatalytic tests demonstrate that as-constructed multi-heterojunction is of higher activity than that of single type I or II heterojunction, respectively, where photogenerated electrons are accumulated on the surface of TiO 2 and photogenerated holes are accumulated on NaBi(MoO 4 ) 2 and Bi 2 MoO 6 , respectively. This study highlights the potential application of TiO 2 electrospun nanofibers in the construction of multiheterojunction for enhanced visible light photocatalysis.
研究领域:
材料科学
·
环境科学
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高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Zahid Nawaz,Nevin Gürbüz,Muhammad Naveed Zafar,Muhammad Nawaz Tahir,İsmail Özdemir,Ryan J. Trovitch
A mild catalytic protocol for aldehyde, amine, and alkyne coupling (A 3 -coupling) allows for the selective synthesis of propargyl amines using 5,6-dimethylbenzimidazole-derived N-heterocyclic carbene (BNHC) silver(I) catalysts. A series of BNHC Ag(Ⅰ) halide complexes were synthesized and their structures have been elucidated through the use of multinuclear NMR and FT-IR spectroscopy. Furthermore, the pseudo-linear geometry of two different compounds was substantiated by single-crystal X-ray diffraction. Silver-based A 3 -coupling was achieved for both acyclic and cyclic secondary amines using a diverse set of alkynes to afford propargyl amines with yields of up to 95 %. The present approach is environmentally benign and water is generated as the sole byproduct.
研究领域:
有机化学
·
催化化学
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高影响因子
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