JOURNAL OF MEMBRANE SCIENCE
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2020
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IF 7.183
Ying Wang,Yuqing Zhang,Jiaqi Wang
To enhance the cleaning efficiency of the ultrafiltration membrane for wastewater, nano spinel CoFe 2 O 4 was synthesized on diatomite via hydrothermal reaction strategy to prepare nano spinel CoFe 2 O 4 deposited diatomite (CF/Dt) particles for activating peroxymonosulfate (PMS), and then used as a functional layer to form CF/Dtcatalytic separation membrane (CF/Dt-M) to remove small and medium molecular pollutants by precise separation and catalytical oxidation . CF/Dt particles and CF/Dt-M were characterized by SEM. The CF/Dt-M was used to deeply clean simulated wastewater containing oil and rhodamine B for investigating its separation and catalytic oxidation performances. The results show that nano spinel CoFe 2 O 4 particles with diameter of 20–100 nm are deposited on the surface of diatomite, and the thickness of CF/Dt-M functional layer is 44 μm. After cleaning simulated wastewater using CF/Dt-M, concentration of oil, RhB and COD in permeate reduces from 57 mg L −1 , 20 mg L −1 , 231 mg·L −1 to 8 mg·L −1 , 0 mg L −1 and 47 mg L −1 , respectively. Water yield of CF/Dt-M is 658 L m −2 h −1 under 0.06 MPa. Nano spinel CoFe 2 O 4 in CF/Dt-M can efficiently activate a small amount of PMS to release a lot of SO 4 •- , making CF/Dt-M perform properties of precise separation and catalytic oxidation. Therefore, CF/Dt-M is a promising candidate extensively applied for cleaning wastewater.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2023
·Vol. 170
·期 3
·037510
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IF 3.9
Rui Cao,Xin Liu,Cheng Yang,Ju Wu
An ultrasensitive and rapid electrochemical detection of trace Hg(II) sensor was developed. The significantly amplified electrochemical signals was caused by the high specific surface area of the electrochemical sensor. Scanning electron microscopy showed that the gold nanospikes were 200 ∼ 300 nm in length and 50 nm in diameter. The electrochemical properties of sensor were characterized by square wave voltammetry. Experimental parameters were optimized using square wave stripping voltammetry. The linear range of sensor for Hg(II) is 3 × 10−10 mol l−1 ∼ 7 × 10−7 mol l−1 and the limit of detection is 1 × 10−10 mol l−1. Hg(II) was successfully quantified in river water and cosmetics. The original Hg(II) in loose powder, Sunblock and whitening lotion using the high ratio surface area electrochemical sensor determination were found to be 2.234, 2.056 and 2.347 mg kg−1 respectively. The results are within the range of standard values, the RSD are 1.7%, 1.5% and 2.1%, respectively. HRSA Au electrode sensor displays high sensitive, excellent stability, reproducibility, especially more convenient than ICP-MS and AFS verification methods. We look forward to the possibility that the HRSA Au electrode sensor can be used for real-time monitoring of Mercury ions in water and cosmetics in the future.
研究领域:
分析化学
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环境科学
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 43
·2304474
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IF 19
Wenyuan Yu,Yanxuan Zhao,Wenting Sheng,Jianping Ge
Electrically responsive photonic crystals (ERPC) are promising materials for electrophoretic displays, smart windows, and tunable optical devices. However, the high working voltage limits the application of most polar ERPCs because it damages color saturation, response stability, and reversibility. Herein, an easy but general method based on the modification of electrodes with nanoparticles is developed to improve ERPC's performance. The deposition of Au, Cu, or Cu 2 O nanoparticles created nanotip structures on the electrode, which enhanced the charge injection and local electric field strength, lowered 43% of the working voltage, and increased the color saturation. Meanwhile, the lowered voltage inhibited the electrodeposition of colloidal particles and the electrochemical reaction, which also improved the stability and reversibility of the electrical response. Based on the region-selective modification of the electrode and the resulting asymmetric electrical response, an electrically triggered tag with a “pattern showing/hiding” effect is fabricated for anticounterfeiting purposes.
研究领域:
材料科学
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光学
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纳米技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yunqi He,Wenfei Wei,Shiping Sun,Yacheng Ma,Ji Li,Zhong Liu
Polyaniline, a notable polymer material, exhibits significant utility in electrical, optical, and thermal due to its unique reversible doping characteristics and physicochemical transformations. The efficiency of nitrogen-containing sites in polyaniline significantly influences its practical performance. This efficiency can be enhanced through molecular engineering by controlling the polymer's structure, degree of polymerization, and morphology. In this study, linear polyaniline with nanotips has been successfully synthesized via regulated voltage during electrochemical polymerization, achieving high-capacity ion extraction and desalination. Low-voltage polymerization eliminated dipolar cations, yielding products containing only quinonoid and benzenoid rings. Furthermore, the lower polymerization degree improved the efficiency of nitrogen-containing sites as electrochemical ion adsorption sites, resulting in a high chloride ion adsorption capacity of 339 mg g −1 and a sodium ion adsorption capacity of 142 mg g −1 . This research advances the development of structurally controllable materials and provides valuable insights into their design, particularly in terms of structural and morphological optimization.
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高影响因子
Journal of Energy Chemistry
·
2025
·
IF 14.9
Weixin Miao,Songliang Liu,Yuewen Sun,Cong Zhang,Meixiang Zheng,Guangshuo Li,Xuejing Cui,Xin Zhou,Luhua Jiang
Electrocatalysis, a form of heterogeneous catalysis, is closely associated with both catalyst properties and the catalyst/electrolyte interfacial microenvironment. Herein, we rationally design and synthesize a unique PdCu nano-sea urchins (PdCu NSUs) featured with high-curvature nanotips, by which the interfacial microenvironment is expected to be tailored to the electrocatalytic reactions. PdCu NSUs exhibit excellent activity for ethanol electrooxidation, with a specific activity of 4.11 mA cm −2 and a mass activity of 2.24 mA μg Pd −1 , and a high Faraday efficiency (FE) of 96.4% toward acetic acid. COMSOL finite element simulations confirm that the unique nanotips could induce a local electric field due to the accumulation of positive charges in the nanotips, resulting in enrichment of OH - at the catalyst surface to promote the formation of Pd−OH ads , a species required by ethanol dehydrogenation. Furthermore, DFT calculations and in-situ electrochemical Fourier transform infrared spectroscopy discover that the d-band center of Pd significantly downshifts in PdCu alloy, which facilitates the desorption of the produced acetic acid. This work provides a new electrocatalytic material with high-curvature nanotips, and also clarifies how the material morphology, by inducing local electric fields, affects the interfacial microenvironment and thus the catalytic activity and selectivity.
研究领域:
电催化
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纳米材料
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表面化学
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计算化学
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电化学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2022
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IF 9.221
Shuzhen Dou,Zhongshun Wang,Qiye Chen,Nan Lu
The high sensitivity of surface-assisted laser desorption/ionization mass spectrometry (SALDI-MS) analysis depends on the enhancement of the signal intensity and the reduction of the background. Here, high-density Si nanotips were prepared as SALDI-MS substrate by taking template-free reactive ion etching for sensitive detection . The high-density Si nanotips act as tiny antennas to concentrate the laser energy and generate photo-induced electrons on a small area, which promotes desorption and ionization of molecule, enhancing the signal intensity. Additionally, the high stability of Si nanotips under laser irradiation ensures low background interference. The applicability of the substrate was demonstrated by the detection of various small molecules, e.g., fatty acids, amino acids , environmental pollutants and drugs. In addition, this substrate can be successfully applied for detecting trace small molecules in complex sample, such as 10 −9 M verapamil in serum and 10 −12 M crystal violet in lake water. Moreover, the banned fungicides left on the fish skin was also detected. The substrate is compatible with imaging, and the endogenous and exogenous substances in fingerprint were visualized by MS imaging. These results demonstrate the easily prepared high-density Si nanotips SALDI-MS substrate is of high detection sensitivity and great value toward large-scale practical applications.
研究领域:
分析化学
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生物医学工程
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材料科学
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高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 14
·2359
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IF 5.719
Hao Fu,Weiwei Liu,Junqing Li,Wenguang Wu,Qian Zhao,Haoming Bao,Le Zhou,Shuyi Zhu,Jinglin Kong,Hongwen Zhang,Weiping Cai
Surface-enhanced Raman scattering (SERS) provides an unprecedented opportunity for fingerprinting identification and trace-level detection in chemistry, biomedicine, materials, and so on. Although great efforts have been devoted to fabricating sensitive plasmonic nanomaterials, it is still challenging to batch-produce a SERS substrate with high sensitivity, good reproducibility, and perfect recyclability. Here, we describe a facile fabrication of three-dimensional (3D) hierarchical Au/CuS nanocomposites, in which high-density Au nanotips enable highly SERS-active sensing, and the well-defined microflower (MF) geometry produces perfect signal reproducibility (RSD < 5%) for large laser spot excitations (>50 μm2), which is particularly suitable for practical on-site detection with a handheld Raman spectrometer. In addition, a self-cleaning ability of this Au/CuS Schottky junction photocatalyst under sunlight irradiation allows complete removal of the adsorbed analytes, realizing perfect regeneration of the SERS substrates over many cycles. The mass-production, ultra-sensitive, high-reproducibility, and fast-recyclability features of hierarchical Au/CuS MFs greatly facilitate cost-effective and field SERS detection of trace analytes in practice.Keywords:Au/CuS hybrids;high-density nanotips;SERS;signal reproducible;substrate recyclable
研究领域:
化学
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材料科学
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纳米技术
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DOI
PubMed
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-8
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IF 15.7
Li Yimeng,Xia Linghan,Li Nan,Tang Shilong,Ge Yunsong,Wang Jianyu,Xiao Bing,Cheng Yonghong,Ang Lay Kee,Meng Guodong
Field electron emission is a key mechanism in nanoelectronics with nanogaps, offering advantages such as high electron velocity and fast switching speeds. However, nanoscale field emission, affected by geometric asymmetry including quantum tunneling near to the emitter, and quantum space charge effects, remains largely unexplored in experimental studies. Here, we in situ investigated field emission characteristics of pure tungsten nanotips across vacuum nanogaps. We revealed a widely applicable scaling behavior between field emission characteristics and the ratio of apex radius to gap length ( R/d ), and demonstrated that the effects of quantum tunnelling due to emitter shape are the predominant influence. We further proposed a modified field emission equation, incorporating an empirical formula for the apex shape factor, k MG ( k MG = f ( R / d ) = 1.680 × ( R / d + 0.468) −1.066 ), valid for R / d = 0.04 to 48. These findings provide fundamental insights into the optimization of nanoelectronic device design and the advancement of future technologies.
研究领域:
纳米电子学
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凝聚态物理
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表面科学
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真空微纳电子学
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场发射器件
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DOI
PubMed
高影响因子
Nature Communications
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2025
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IF 15.7
Li Yimeng,Xia Linghan,Li Nan,Wang Jianyu,Tang Shilong,Ge Yunsong,Xiao Bing,Xie Degang,Cheng Yonghong,Shan Zhi-Wei,Djurabekova Flyura,Meng Guodong
Electric-field-induced effects severely impact the long-term stability and reliability of nanoelectronic devices with nanogaps, such as field emission nanodiodes, field-effect nanotransistors and ultrafast switches. However, the damage mechanisms behind nanostructured electrode under high electric fields remain unclear. Here, we investigate deformation behaviors of tungsten nanotips, a typical nanostructured electrode, under an external electric field ( ~ 10 V/nm) using an in situ transmission electron microscopy (TEM), presenting the direct observation of both surface morphological evolution and dislocation dynamics. We find that electron wind effects and nanoscale effects dramatically reduce the atom evaporation threshold to 10-13 V/nm, which is approximately one-fourth to one-fifth of the previously reported values of 40-60 V/nm. Furthermore, we identify a field-induced deformation mechanism where strong electric fields and emission currents generate substantial, size-dependent structural changes closely governed by crystallographic orientation (Wulff shape) without external heating, occurring primarily through field-assisted evaporation rather than conventionally assumed field-induced surface atom diffusion. These findings enhance the understanding of electric-field-induced damage and are crucial for nanoelectronic devices optimization, reliability, and lifetime evaluation.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Mei Li,Shengbo Zhang,Mohammed Ahmed Abdulraheem Alwafi,Jinyu Han,Xinli Zhu,Qingfeng Ge,Hua Wang
The morphology of catalysts is a key factor influencing their photocatalytic performance. Herein, we prepared three W 18 O 49 photocatalysts with different morphologies of sea urchin (W 18 O 49 SU), nanorod (W 18 O 49 NR) and hollow sphere (W 18 O 49 HS), and evaluate their performances in photocatalytic hydrolysis of ammonia borane (AB). Remarkably, W 18 O 49 SU exhibited an impressive photocatalytic H 2 production rate with the highest TOF of 53.1 min −1 under visible light, which is 10.4 and 7.5 times higher than those of W 18 O 49 HS and W 18 O 49 NR, respectively. The comprehensive characterizations and control experiments revealed that the unique sea urchin-like morphology enabled the strong light harvesting by multiple light scattering, fast separation of photogenerated charges and directional electron enrichment by nanotip effect, which collaboratively boost the photocatalytic activity . Moreover, the enhancement effect of sea urchin-like morphology is again approved well on Nb 2 O 5 photocatalysts. This work opens a paradigm to synergistically improve light harvesting and charge separation efficiency through rational design of photocatalyst nanostructure .
研究领域:
材料科学
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光催化
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纳米技术
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化学工程
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DOI
高影响因子
BIOMATERIALS
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2022
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IF 15.304
Shuting Lu,Wei Feng,Xijuan Yao,Xinran Song,Jinhe Guo,Yu Chen,Zhongqian Hu
Nanodynamic therapy (NDT) based on reactive oxygen species (ROS) generation has been envisioned as a distinct modality for efficient cancer treatment. However, insufficient ROS generation and partial ROS consumption frequently limit the theraputic effect and outcome of NDT owing to the low oxygen (O 2 ) tension and high glutathione (GSH) level in tumor microenvironment (TME). To circumvent these critical issues, we herein proposed and engineered the biodegradable GSH-depletion Mn(III)-riched manganese oxide nanospikes (MnO x NSs) with the photosynthetic bacterial cyanobacteria (Cyan) as a high-efficient and synergistic platform to reshape TME by simultaneously increasing oxygen content and decreasing GSH level. Specifically, under the trigger of acidity, MnO x NSs reacted with photosynthetic oxygen can generate toxic singlet oxygen ( 1 O 2 ). Moreover, MnO x NSs significantly reduced intracellular GSH, resulting in decreased GPX4 activity, which induced tumor cell non-apoptotic ferroptosis . Consequently, this combined strategy based on coadministration with Cyan and MnO x NSs demonstrated the superior antitumor efficacy via amplification of oxidative stress in 4T1 tumor-bearing mice for the synergetic oxygen-augmented nanodynamic/ferroptosis therapy. This work highlights a facile synergistic micro-/nano-system with the specific capability of reshaping TME to augment the sensitivity and therapeutic efficacy of NDT in solid hypoxic tumor therapy.
研究领域:
癌症治疗
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纳米技术
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生物医学工程
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微生物学
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药理学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）