ACS Applied Materials & Interfaces
·
2020
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IF 8.758
Fanju Zeng,Yuanyang Guo,Wei Hu,Yongqian Tan,Xiaomei Zhang,Julin Feng,Xiaosheng Tang
Recently, several types of lead halide perovskites have been demonstrated as active layers in resistive switching memory or artificial synaptic devices for neuromorphic computing applications. However, the thermal instability and toxicity of lead halide perovskites severely restricted their further practical applications. Herein, the environmentally friendly and uniform Cs3Cu2I5 perovskite films are introduced to act as the active layer in the Ag/Cs3Cu2I5/ITO memristor. Generally, the Ag ions could react with iodide ions and form AgIx compounds easily, so the Ag/PMMA/Cs3Cu2I5/ITO memristor was designed by employing the ultrathin polymethylmethacrylate (PMMA) layer to avoid the direct contact between the top Ag electrode and Cs3Cu2I5 perovskite films. After optimization, the obtained memristor demonstrated bipolar resistive switching with low operating voltage (< ±1 V), large on/off ratio (102), stable endurance (100 cycles), and long retention (>104 s). Additionally, biological synaptic behaviors including long-term potentiation and long-term depression have been investigated. By using the MNIST handwritten recognition data set, the handwritten recognition rate based on experimental data could reach 94%. In conclusion, our work provides the opportunity of exploring the novel application for the development of next-generation neuromorphic computing based on lead-free halide perovskites.
研究领域:
材料科学
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电子工程
·
神经科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Tuo Zhang,Xinyi Chen,Yu Wang,Lijuan Li,Yuanyuan Sun,Yanan Wang,Xibai Zeng
2- Line ferrihydrite (Fh) is widely used as a robust amendment for rapid arsenic removal or remediation in water or soil. However, the poorly crystalline phase of Fh is unstable and leads to arsenic leaching after long-term submergence in reductive aquatic and soil environments. In this study, the synthesized As(V)-bound Fh was characterized by various spectral approaches to investigate the factors that may affect the variation in As(V)-Fh in long-term continuously submerged soil suspensions. The X-ray diffraction (XRD) results showed that hematite was the main product and that goethite was the byproduct after 360 d of incubation. Approximately 12–17% and 4–5% Fh were transformed at As/Fe mole ratios of 0.005 and 0.05, respectively. After 360 d of incubation, the hematite morphology was clearly observed by scanning electron microscopy (SEM), and the As(V)-Fh surface areas were also decreased by 17.3–27.6% and 11.9–16.6% for As/Fe mole ratios of 0.005 and 0.05, respectively. In a comparison of the two tested soils (soils sampled in Sichuan Province (SC) and Hunan Province (HN)), As(V)-Fh transformed faster in HN soil suspensions, and more hematite and goethite were formed. Furthermore, during the incubation period, As(V) was transformed to As(III), and both species were released into the suspension from the As(V)-Fh surface. It was suggested that soil pH and Fe(II) concentration were key factors controlling the As(V)-Fh transformation process, and the differences between the two soils were due to the different soil pH values and contents of available Fe. Arsenic release was mainly caused by Fh transformation and ligand competition with soil organic matter (SOM).
研究领域:
环境科学
·
土壤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2016
·
IF 3.698
Dong Zhou,Jie Yang,Hui Li,Changzheng Cui,Yunjiang Yu,Yongdi Liu,Kuangfei Lin
To investigate biological effects of bisphenol A (BPA) over the long term, the model animal Caenorhabditis elegans was used to conduct the chronic exposure. C. elegans were exposed to BPA (0.0001–10 μM) from L4 larvae to day-10 adult in the present chronic toxicity assay system. Multiple endpoints at the physiological (growth, locomotion behaviors and lifespan), biochemical (lipofuscin accumulation), molecular (stress-related genes expressions), and population (population size) levels were examined. At the physiological level, BPA exposure induced significant negative effects on the indicators. Among the endpoints, head thrash was most sensitive and the detection limit was 0.001 μM. At the biochemical level, BPA exposure induced no significant effects on lipofuscin accumulation. At the molecular level, BPA induced strong stress responses in vivo . At the population level, the population size was significantly decreased in the treatment groups from 0.1 to 10 μM. Compared to the previous short-term toxicity evaluation, long-term exposure to BPA induced a more obvious response at the same concentration, and the phenomenon might be due to cumulative toxic effects. By the Pearson correlation analyses, cep-1 was speculated to act as an important role in BPA-induced chronic toxicity on C. elegans .
研究领域:
毒理学
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环境科学
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分子生物学
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行为生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yanlin Chen,Qingyan Zhang,Xijun Fu,Shuaishuai Guo,Qingyi Zeng
Hydroxyapatite (HAP) has been recognized as an effective absorbent for uranium. Recognizing and revealing its fate in coordinating with uranyl ions (U(VI)) under various conditions are vital for its practical application. In this work, HAP nanoflowers were synthesized by a simple wet chemical method, and the immobilization properties of HAP on U(VI) and U(VI) phase transformation during immobilization process were investigated systematically using a host of experimental methods and advanced characterization techniques. The results show that HAP can effectively immobilize U(VI) at high concentrations (50–3000 mg/L), with a maximum U(VI) adsorption capacity (q) of 10,200 mg/g and a distribution ratio (K d ) higher than 1.16 × 10 5 mL/g. Under the presence of sufficient U(VI) and a pH around 1.5 ∼ 3.0, HAP can rapidly react with U(VI) to form Autunite (Ca(UO 2 ) 2 (PO 4 ) 2 ·3H 2 O) with a nanoflake morphology, which is demonstrated excellently long-term stability. A moderately low pH that enables form adequately free calcium ions and phosphate groups via hydrolysis of HAP is essential to the mineralization of U(VI). This work is expected to pave the way for the use of HAP to develop highly efficient immobilization agents for the remediation of uranium-contaminated scenes and presents a comprehensive insight into the mechanisms of long-term U(VI) stabilization.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Zhou Fang,Ying Su,Yaqin Yu,Huaijian Zhang,Xintian Qian
Diffusive Gradients in Thin-films (DGT) technique is a promising passive sampling technique, which was used for the determination of lots of inorganic and organic pollutants. Although many DGT devices have not been extensively tested and verified in field, DGT device such as LSNP-NP, LSNT-NP, LSNZ-NP, and LSNM-NP DGT were widely employed for the assessment of various trace elements. However, the deployment time of these DGTs were much shorter than the theoretical time in the preexisting literature. Therefore, the performance of DGT for long-term application in different water bodies is not known. This investigation utilized the four DGTs for the assessment of various trace elements across extended periods both in controlled laboratory settings and natural field environments. Synthetic soft, hard, and seawater compositions served as media for laboratory deployments. Most elements can be measured accurately in 4–7 days in soft and hard water. Deployment durations in seawater exhibited a notable reduction compared to those in freshwater matrices. LSNZ-NP DGT excelling in oxyanion determination, while LSNT-NP DGT showcased superior efficacy in phosphorus quantification. Field deployments in rivers and sea affirmed the robustness of LSNZ-NP DGT, evidencing prolonged deployment capabilities for various elements, such as Mo, Se, As, Sb, and P, spanning 7–28 days. Assessment of pollution levels across four sampling sites revealed heightened concentrations of most elements in marine waters relative to riverine environments, except for phosphorus. Notably, all assessed elements, except for phosphorus, conformed to Class I water quality standards. This study demonstrated the difference between the theoretical application time and actual application time for the first time. It raises new questions for the application of DGT in nature water bodies. The mechanization of the difference between the theoretical and actual application time should be studied in the future research. The measures to extend the application time should be studied too.
研究领域:
环境科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2019
·Vol. 8
·期 4
·736-742
·
IF 5.047
Shuo Guo,Yuanqiang Sun,Xin Geng,Ran Yang,Lehui Xiao,Lingbo Qu,Zhaohui Li
Lysosomes are crucial dynamic organelles which play key roles in different cellular processes such as autophagy, endocytosis and phagocytosis. Thus, long-term and real-time lysosomal imaging is desirable and essential to understand the dynamics and biological functions of lysosomes. Herein, ultra-stable carbon dots (CDs) which have shown many advantages such as pH-independence, high water solubility, good photostability and high biocompatibility for lysosome labeling and long-term tracking were synthesized using a one-pot pyrolysis method via microwave irradiation. Compared with the commercial lysosome probe (LysoTracker™ Deep Red), the fluorescent CDs show superior resistance to photobleaching and the HeLa cells were stably labeled by CDs for over 48 h. In addition, the CDs could stain lysosomes in different cell lines with high specificity and track lysosomal movements. Furthermore, the CDs could stain not only lysosomes in living cells, but also lysosomes in drug-induced apoptotic cells and fixed cells, suggesting that they are suitable for lysosomal tracking under both physiological and toxicological processes. All these excellent properties could be attributable to the ultrastability of CDs, which can be employed for constructing nanoplatforms for other applications such as drug carriers and signal guiders in biological processes. This study provides not only a strategy to synthesize green fluorescent CDs for tracking lysosomes, but also a promising candidate for drug loading and signal guidance of biological processes.
研究领域:
细胞生物学
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生物材料学
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医学影像学
✓ 已验证
DOI
PubMed
高影响因子
CATALYSIS LETTERS
·
2024
·
IF 2.3
Zhao Chunzhi,Mao Dongsen,Meng Tao,Guo Qiangsheng,Yu Jun
Owing to the intrinsic nature of the uniformed topologies and ultrasmall Zr 6 nodes of Zr-MOFs, herein, we employed Zr-MOFs (UiO-66 and UiO-67), as opposed to the support of traditional ZrO 2 , to prepare the Pd catalysts for toluene degradation. Compared with the catalysts of Pd/UiO-66 and Pd/ZrO 2 , Pd/UiO-67 catalyst boosted an excellence catalytic performance for toluene degradation, giving the lowest T 90% value of 235 °C with long-term stability. With the assisting of the cavity confinement of Zr-MOFs, Pd nanoparticles are prone to be encapsulated in the 3D frameworks of Zr-MOFs, and the bigger micropores of UiO-67 are more conducive to the formation of larger Pd nanoparticles. The in situ FT-IR results further declared that although the active sites are partly sacrificed due to the larger Pd nanoparticles formed in UiO-67, the stable adsorbed toluene on Pd/UiO-67 boosted the quick degradation of toluene in the reaction interval even without undergoing intermediate processes of benzoate and benzaldehyde. Graphical Abstract UiO-66, UiO-67 and ZrO 2 were employed to prepare the Pd catalysts for toluene degradation, Pd/UiO-67 catalyst boosted an excellence catalytic performance with long-term stability.
研究领域:
催化化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2025
·
IF 1.6
Tian Duan,Wang Zhe,Zhang Jiaqian,Luo Ying,Zhang Zhenlong,Li Chao,Ye Kai,Peng Chaoliang,Chen Yiming,Lin Wenxue,Zhang Jingyan
This study examines attapulgite-bentonite-pyrite (AB 7 Fe) and zeolite-bentonite-pyrite (ZB 7 Fe) mixtures as buffer and backfill materials for nuclide migration using soil column experiments and COMSOL modeling. The results indicated that ZB 7 Fe possessed higher adsorption capacities for cesium (Cs) and strontium (Sr) compared to AB 7 Fe. Conversely, AB 7 Fe demonstrated superior retardation performance, more effectively slowing nuclide migration. After 1000 years, Cs and Sr concentrations in AB 7 Fe surpassed those in ZB 7 Fe. Additionally, nuclide migration increased with higher initiation pressure, dispersion, and diffusion coefficients. This research is crucial for improving the long-term safety of nuclear waste repositories.
研究领域:
环境科学
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核废物管理
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Linlin Zhang,Yan Gao,Xin Ding
A PMMA (polymethly methacrylate) oligomer coating photoanode sensitized with the Ru(bpy) 3 phosphoric acid derivative 1 as photosensitizer and complex 2 as water oxidation catalyst was assembled for light driven water splitting. A simple and effective method was optimized by immersing the sensitized photoanode into the DCM solution dissolving 2 wt% PMMA for 15 s. With the decorated photoanode as working electrode, the DS-PEC displayed much better long-term stability, the photocurrent density of which was found to be 0.57 mA/cm 2 after 200 s sustaining light illumination and is four times as high as the undecorated one (0.15 mA/cm 2 ).
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2024
·
IF 4.1
Yuhan Zhao,Rui Zhang,Yunqing Liu,Feng Wang,Shi Hu,Fenghui Yang,Chao Tao,Qiong Wu,Baoli Zha,Jiansheng Wu,Fengwei Huo
The commonly employed wet and semi-dry electroencephalogram (EEG) electrodes require the use of conductive media, resulting in issues such as reduced comfort, detached conductive coatings, and limitations in long-term wearing. In this study, we present a user-friendly dry EEG electrode made from conductive leather for long-term EEG monitoring. The conductive leather was obtained by in-situ synthesis of polypyrrole inside the goat leather, which could be further used as an EEG electrode. When positioned on the forehead, the interface impedance between the leather electrode and human skin complied with the international standard for EEG electrodes. The material's exceptional breathability enabled prolonged electrode wear. These leather electrodes facilitated precise monitoring of eye movement signals and α-wave activities in a relaxed state, laying the groundwork for extending their application to other brain regions. Furthermore, leather electrodes exhibited excellent performance even in the presence of sweat interference, thus confirming their advantages for long-term EEG monitoring. The leather dry electrode featuring superior wearability, portability, and long-term stability is expected to bring significant implications for future wearable technologies and monitoring devices.
研究领域:
生物医学工程
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神经科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2024
·
IF 5.4
Shengxue Yan,Rui Huang,Hansai Liu,Shaohua Luo
Supercapacitors (SCs) are promising energy supply systems for various electronics. In this work, we detailed the in situ growth of FeCo2S4 on MXene for asymmetric SCs. Notably, the digital model was first built to explore the relationship between wt (FeCo2S4) and capacitance performance, realizing the maximum theoretical capacity (3635.7 F g–1) prediction. Furthermore, it was discovered that the synergistic effect of the FeCo2S4/MXene heterojunction could dramatically improve conductivity and structural stability, which accelerated charge transmission at the electrode/electrolyte interface, resulting in a significant enhancement in electrochemical performance. The FeCo2S4/MXene electrode exhibited a higher capacitance of 2415.3 F g–1 and a prominent long-term stability of about 90.5%. And the FeCo2S4/MXene//AC declared an impressive energy density of 68.7 Wh kg–1 at a power density of 800 W kg–1. The FeCo2S4/MXene composite systems have great potential for advanced SC systems due to their facile assembly and remarkable electrochemical performance.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS ES&T Engineering
·
2024
·
IF 7.4
Shiyu Cao,Lin Zhang,Cancan Ling,Furong Guo,Meiqi Li,Chuan Liang,Jundi Cheng,Yanbiao Shi,Hongwei Sun,Lizhi Zhang
Mackinawite (FeS) is an excellent Cd(II) removal material but suffers from rapid reactivity loss. Herein, we demonstrate that rational surface preoxidation could enhance the single maximum adsorption capacity of mackinawite from 625.0 to 666.7 mg g–1 and also promote its air stability and reusability for long-term application. The Cd(II) removal processes were carefully characterized with a multifunctional in situ electrochemical device, theoretical calculation, and extended X-ray absorption fine structure (EXAFS) spectroscopy. Characterization results revealed that surface preoxidation treatment changed the Cd(II) removal mechanism from ion exchange to ion-exchange coupled surface adsorption because surface preoxidized FeS possessed abundant surface −OH sites. This extra surface adsorption process offered surface preoxidized FeS a superior long-term Cd(II) removal performance of 1290.5 mg g–1 in 5 successive cycles, much higher than that of pristine FeS (842.4 mg g–1). This study highlights the importance of surface oxidation on the Cd(II) removal performance of mackinawite and also opens a new strategy to design and produce high-performance mackinawite nanocrystals for pollutant control and environmental remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）