SOLAR ENERGY
·
2015
·
IF 3.469
Meijie Chen,Yurong He,Jiaqi Zhu,Yong Shuai,Baocheng Jiang,Yimin Huang
In this work, plasmonic silver nanoparticles were added to a working fluid to improve its solar thermal conversion efficiency. Silver nanoparticles were synthesized by a novel photochemical transformation of aqueous silver nanoparticle precursors, which was reduced by NaBH 4 using Polyvinyl Pyrrolidone (PVP) and sodium citrate stabilizers. Experimental results showed that silver nanofluids performed much better at very low concentrations than other working fluids at relatively high concentrations exposed to both simulated and natural sunlight. Under simulated sunlight, the efficiency of the silver nanofluid is 84.61% after 5 min irradiation with a mass concentration of 80.94 ppm, which was almost twice that of water and also much higher than that of ZnO nanofluid (mass concentration of 1.02%) and TiO 2 nanofluid (concentration of 0.7%). The efficiency of the low concentration Ag nanofluid improved with the increase of nanoparticle concentration. With the increase of irradiation time, both the temperature increment and Specific Absorption Rate ( SAR ) decreased, which showed that the effect of nanofluid as a working fluid in a solar collector was great at the beginning, this is to say at the lower end of the temperature range. After 5 min, at the lowest concentration of 20.24 ppm, the highest value of SAR reached ∼827 W/g.
研究领域:
纳米流体
·
太阳能转换
·
等离激元学
·
纳米材料
·
光化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2013
·
IF 1.789
Ai Zhu Liu,Jian Xin Wang,Chang Rong He,He Miao,Yi Zhang,Wei Guo Wang
Nanocrystalline Ce 0.9 Gd 0.1 O 1.95 (GDC) powders are successfully prepared by an acetic–acrylic method using acrylic acid, cerium acetate and gadolinium acetate as the starting materials. The polymeric precursors are characterized by means of TG/DTA, XRD and FT-IR, and the resultant powders are characterized by XRF , BET, SEM and particle size distribution (PSD) analysis. It is shown that the morphology of the oxide particles is dependent on the preparation conditions such as molar ratio of acrylic acid to metallic ions ( L / M ) and the sort of surfactant . High purity, single phase, homogeneous, nanocrystalline GDC powders with slight aggregation are obtained using ethylene glycol as surfactant, L / M =0.5 and heat treatment above 600 °C. The low application amount and high effect of acrylic acid is attributed to the co-operation of carboxyl group and ethylenic bond. The electrical conductivity of the sintered GDC pellet is 0.053 Scm −1 in air at 750 °C. The present work indicates that the acetic–acrylic method is a relatively green method without any NO x to synthesize high performance GDC powders.
研究领域:
材料科学
·
无机非金属材料
·
固态离子学
·
能源材料
·
纳米材料化学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2026
·
IF 12.2
Yanting Qiu,Tao Qiu,Lulu Xu,Yuechen Liu,Ruiqi Man,Yiran Peng,Dapeng Liang,Zhijun Wu,Min Hu
Brown carbon (BrC) aerosols significantly contribute to global warming, yet their atmospheric aging remains poorly constrained. BrC photobleaching is considered a key process that reduces its radiative forcing. However, as the mass fraction of nitrate, which is also photochemically active, in aerosols increases, its impact on BrC photobleaching remains highly controversial. In this work, we demonstrated that nitrate photolysis effectively mitigates BrC photobleaching through a previously overlooked compensation mechanism. Combining high-resolution mass spectrometry, multivariate statistics, and quantum chemical calculations, we reveal that nitrate photolysis continuously generates light-absorbing N-containing compounds, predominantly nitrogen-aromatic conjugates, that offset absorption losses from photobleaching. Globally, neglecting this effect leads to a 1.0%–3.7% underestimation of BrC’s direct radiative effect, escalating to 2.4%–8.5% in nitrate-rich regions such as East Asia. Our findings establish nitrate photolysis as a crucial moderator of BrC’s atmospheric lifetime and warming potency, necessitating a reconsideration of BrC’s climatic role in anthropogenically influenced regions.
✓ 已验证
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Lingyuan Wang,Lanfeng Hui,Weiyin Su
We prepared super-hydrophobic nanocellulose films using a non-toxic octadecylamine/polydopamine system. Octadecylamine, a low surface energy material, was used to provide hydrophobic alkyl long chains. Polydopamine was produced by dopamine under alkaline conditions, creating an adhesive substance, which reinforced the hydrophobic long chains and increased the surface roughness of nanocellulose. The effects of reagent concentration, reaction temperature, and reaction time on hydrophobicity were then investigated. The results showed that with a 1:1 mass ratio of nanocellulose to octadecylamine, and reacting at 60 °C for 4 h, the contact angle of the obtained composite membrane reached 168.2°. Scanning electron microscope images revealed that the modified nanocellulose had a smaller particle size and more uniform distribution, which effectively improved the hydrophobicity of the nanocellulose. Thus, the green preparation of superhydrophobic films with high-temperature resistance and wear resistance was realized, which contributed to the high-value utilization of nanocellulose.
研究领域:
材料科学
·
纳米技术
·
表面化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Xuelian Fu,Chaoqun Shang,Mingyang Yang,Eser Metin Akinoglu,Xin Wang,Guofu Zhou
Li metal anode is promising materials for high-energy-density Li metal batteries (LMBs) due to its large theoretical specific capacity and negative reduction potential. However, the poor safety and insufficient cyclability caused by the dendritic Li growth hinder the commercialization of LMBs. To alleviate the formation of Li dendrites and further improve the cycling stability of LMBs, an ion-conductive polyacrylonitrile (PAN)-based hybrid separator is proposed. The hybrid separator is composed of flexible PAN and high ionic conductive W-doped Li 6·3 La 3 Zr 1·65 W 0·35 O 12 (LLZWO) as the function of physical blocking to realize the Li dendrite-free. As a result, the hybrid separator with 20 wt% LLZWO (PLL-20) shows high ionic conductivity (6.89 × 10 −5 S cm −1 ) and high Li-ion transference number (0.58). The Li|PLL-20|Li symmetric cells exhibit long-term stability without Li dendrite growth at 0.2 mA cm −2 for over 350 h. Furthermore, the Li|PLL-20|LiFePO 4 battery delivers a high discharge specific capacity of 138.2 mAh g −1 at 0.2C under ambient conditions. This work highlights the ability of hybrid functional separators to protect Li metal anode in high-energy-density LMBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Green Energy & Environment
·
2022
·
IF 12.781
Guoshen Yang,Gangrui Qu,Chi Fang,Jie Deng,Xianqi Xu,Yinghao Xie,Tian Sun,Yachao Zhu,Jiaxin Zheng,Hang Zhou
The recent advances in aqueous magnesium-ion hybrid supercapacitor (MHSC) have attracted great attention as it brings together the benefits of high energy density, high power density, and synchronously addresses cost and safety issues. However, the freeze of aqueous electrolytes discourages aqueous MHSC from operating at low-temperature conditions. Here, a low-concentration aqueous solution of 4 mol L −1 Mg(ClO 4 ) 2 is devised for its low freezing point (−67 °C) and ultra-high ionic conductivity (3.37 mS cm −1 at −50 °C). Both physical characterizations and computational simulations revealed that the Mg(ClO 4 ) 2 can effectively disrupt the original hydrogen bond network among water molecules via transmuting the electrolyte structure, thus yielding a low freezing point. Thus, the Mg(ClO 4 ) 2 electrolytes endue aqueous MHSC with a wider temperature operation range (−50 °C–25 °C) and a higher energy density of 103.9 Wh kg −1 at 3.68 kW kg −1 over commonly used magnesium salts (i.e., MgSO 4 and Mg(NO 3 ) 2 ) electrolytes. Furthermore, a quasi-solid-state MHSC based on polyacrylamide-based hydrogel electrolyte holds superior low-temperature performance, excellent flexibility, and high safety. This work pioneers a convenient, cheap, and eco-friendly tactic to procure low-temperature aqueous magnesium-ion energy storage device.
研究领域:
电化学
·
能源存储
·
材料科学
·
超级电容器
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2017
·Vol. 184
·期 9
·3557-3563
·
IF 4.58
Liu Xiuying,Gao Tengfei,Gao Xue,Ma Tao,Tang Yiwei,Zhu Lijie,Li Jianrong
The authors describe an aptamer based method for the determination of the antibiotic sulfadimethoxine (SLF). It is making use of upconversion nanoparticles (UCNPs) that act as an internal fluorophors signals, and of aptamers that can specifically recognize SLF. The UCNPs were deposited on the surface of magnetic nanoparticles (magNPs) functionalized with the aptamer. In the presence of SLF, parts of the UCNPs dissociate from the surface of the magNPs, and this results in decreased fluorescence intensity. The findings were exploited to design a fluorometric assay for SLF that has a 0.11 ng·mL −1 detection limit. The method was successfully applied to the quantification of SLF in spiked samples of perch and catfish. Recoveries range from 80.3% to 92.7%, and RSDs from 2.4% to 3.6%.
Schematic of an aptamer based method for the determination of the antibiotic sulfadimethoxine (SLF). It is making use of upconversion nanoparticles (UCNPs) that act as an internal fluorophors signals, and of aptamers that can specifically recognize SLF.
研究领域:
分析化学
·
纳米技术
·
环境科学
·
药物分析
✓ 已验证
DOI
高影响因子
Journal of Zhejiang University-SCIENCE A
·
2020
·Vol. 21
·期 1
·74-84
·
IF 1.49
Fang Yang-yang,Wang Xiao-zhong,Chen Ying-qi,Dai Li-yan
The Knoevenagel condensation reaction has wide applications ranging from the manufacture of basic chemicals to pharmaceutical intermediates. In this study, we developed an efficient and magnetic bimetallic NiCo 2 O 4 nanocatalyst by co-precipitation. When used in the Knoevenagel condensation between various benzaldehydes and malononitrile, the catalyst exhibited excellent catalytic performance with 99% conversion and 99% selectivity under mild conditions. It can be easily recovered with a magnet and recycled for 20 runs without significant loss of activity. We expect that the catalyst will find large-scale industrial applications.
研究领域:
催化化学
·
纳米材料科学
·
有机合成方法学
·
绿色化学
·
工业催化
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry B
·
2019
·Vol. 8
·期 3
·406-415
·
IF 5.047
Tingting Yang,Donghui Wang,Xuanyong Liu
Photothermal therapy originated from using gold nanorods (GNRs) and near-infrared (NIR) irradiation has been widely used in the antibacterial field. Zn element exhibits antimicrobial activity against various bacterial and fungal strains. In this study, a bilayer film, consisting of GNRs as the inner layer and a polydopamine layer containing Zn element (PDA@Zn) as the outer layer, was deposited on the Ti surface. The results testified that all the GNR-modified surfaces had the same photothermal conversion efficiency. The Ti surface modified with GNR and PDA@Zn layers had better antibacterial activity against E. coli and S. aureus due to the GNR-induced photothermal effect and the antibacterial Zn element. Moreover, the accelerated release of Zn ions from the PDA@Zn layer was attributed to the GNR-induced high temperature under the NIR irradiation, which caused the concentration of Zn ions to be high enough to kill the surrounding bacteria. This study illustrates that a composite surface possessing both the contact and heat-responsive antibacterial property was constructed on titanium for potential clinical applications.
研究领域:
生物材料学
·
微生物学
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2019
·
IF 5.108
Steven J. Brooks,Carlos Escudero-Oñate,Adam D. Lillicrap
The study assessed the environmental toxicity of three Norwegian mine tailings from Omya Hustadmarmor, Sydvaranger, and Sibelco, which are all released into a seawater recipient. Ecotoxicity assessments were performed on the overlying water extracted from the mine tailings, the transformation/dissolution waters obtained from the mine tailings, and whole sediment assessment using a suite of marine organisms including algae, Crustacea, and Mollusca. Overall, based on the toxicity evaluation of the transformation/dissolution data, Sibelco tailings resulted in the highest toxicity albeit at relatively high concentrations, followed by Sydvaranger and Hustadmarmor. Sibelco was the only mine where process chemicals were not used. In contrast, the Corophium sediment contact assay revealed a significantly higher toxicity exerted by Hustadmarmor tailings, which may indicate a physical impact of the fine tailings. The effects observed were discussed with respect to both the measured chemical concentrations of the tailings and the potential physical impact of the tailing particles on organism health.
研究领域:
生态毒理学
·
环境科学
·
海洋生物学
·
污染监测
·
地质环境学
✓ 已验证
DOI
高影响因子
Cell Reports
·
2023
·Vol. 42
·期 12
·113480-113480
·
IF 8.8
Liang Y,Meng F,Zhao X,He X,Liu J
The endoplasmic reticulum (ER) is the largest intracellular endomembrane system; it shows dynamic changes upon environmental stress. To maintain ER morphology and homeostasis under stress, the excessive ER membrane and the associated unwanted proteins can be removed via ER-phagy. Although a few ER-phagy receptors have been reported in mammals and yeast, their functional counterparts in plants remain largely unexplored. Here, we report that the HVA22 family protein OsHLP1 is an uncharacterized ER-phagy receptor in rice (Oryza sativa L.). OsHLP1 interacts with OsATG8b and recruits ER subdomains and the cargo protein OsNTL6, a negative immune regulator, to autophagosomes upon infection with the fungus Magnaporthe oryzae, which substantially activates disease resistance in rice. AtHVA22J, an Arabidopsis thaliana OsHLP1 ortholog, induced similar ER-phagy in plants. Altogether, we unraveled a conservative protein family that may act as ER-phagy receptors in higher plants, and in particular, we highlighted their roles in rice immune responses.
研究领域:
植物生物学
·
分子生物学
·
植物病理学
✓ 已验证
DOI
PubMed
高影响因子
Breast Cancer-Targets and Therapy
·
2023
·
IF 2.6
Mengqi Zhang,Shengxian Bao,Guanhua Qiu,Jingchen Liang,Qin Wang,Xiaoqi Zhu,Guchun Qin,Junjie Liu,Chang Zhao
Purpose In this experiment, we constructed a magnetic targeting nano-diagnosis and treatment platform of doxorubicin (DOX) combined with iron nanoparticles, and explored their application value and mechanism in the treatment of Triple Negative Breast Cancer (TNBC), as well as its new diagnosis and treatment mode in Magnetic Resonance Imaging (MRI).Patients and Methods Hollow mesoporous nanoparticles (HFON) were synthesized by solvothermal method, and loaded the drug DOX (DOX@HFON) to treat TNBC. The experiments in vivo and in vitro were carried out according to the characteristics of the materials. In vitro experiments, the killing effect of the drug on cells was verified by cell viability CCK8, ROS generation level, LPO evaluation and flow cytometry; the MRI effect and targeted anti-tumor therapy effect were studied by in vivo experiments; then the tumor tissue sections were detected by Ki-67, CD31, ROS, LPO and TUNEL immunofluorescence detection; H&E staining and blood biochemical tests were used to evaluate the biosafety of the materials.Results Through a series of characterization tests, it is confirmed that the nano-materials prepared in this experiment have positive drug loading properties. MDA-MB-231 cells had great phagocytic ability to DOX@HFON under Confocal Laser Scanning Microscope (CLSM). Experiments in vitro confirmed that DOX and Fe were released and concentrated in cells, and a large number of ROS production and induction of LPO were detected by DCFH-DA and C11-BODIPY probes in cells. Apoptosis experiments further confirmed that DOX@HFON induced apoptosis, autophagy and ferroptosis. In the vivo experiment, the anti-tumor therapy effect of MAGNET@DOX@HFON group was the most significant, and in MRI also proved that the drug had great tendency and imaging ability in tumor tissue.Conclusion The new magnetic targeting nano-diagnosis and treatment platform prepared in this experiment is expected to become a new treatment model for TNBC.
研究领域:
癌症研究
·
纳米技术
·
分子生物学
·
成像技术
·
药理学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）