COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Zhengang Bu,Jianhua Li,Siqi Fang,Yuanlin Zhan,Wenzhuo He,Yibin Huang
The uniform and stable deposition of metal-organic frameworks (MOFs) onto membranes without compromising their performance presents a significant challenge. This study reports the fabrication of a photocatalytic self-cleaning membrane using hydrothermal and photochemical substitution methods. These methods enabled the uniform and stable deposition of β-FeOOH nanorods, m-MIL-100(Fe), and Ag nanoparticles (NPs) not only on the members surface but also throughout the interior of polyvinylidene fluoride (PVDF) membrane pores. The synergistic effect of these materials and their uniform and stable distribution within the PVDF membrane resulted in superior photocatalytic efficacy. The membrane's excellent photocatalytic performance facilitated the degradation of most pollutants, ensuring prolonged usage. Unlike other photocatalytic membranes requiring additional cocatalysts, our membrane degraded over 90% of various dyes without H 2 O 2 , demonstrating a greener usage mode and higher photocatalytic efficiency. The valence band (VB) and conduction band (CB) of β-FeOOH nanorods and m-MIL-100(Fe) were calculated, confirming the existence of a type-II heterojunction for the first time. Free radical trapping experiments identified hydroxyl radicals (·OH) as the primary reactive species in the degradation process. This research provides a novel approach to uniformly and stably load MOFs on membranes, enhancing their properties and offering insights into fabricating multifunctional photocatalytic membranes.
研究领域:
材料科学
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环境工程
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2016
·Vol. 18
·期 7
·1-10
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IF 2.101
Li Lei,Zhao Aiwu,Wang Dapeng,Guo Hongyan,Sun Henghui,He Qinye
The cube-like Fe 3 O 4 @SiO 2 @Ag (FSA) nanocomposites with great SERS activity have been successfully synthesized by a layer-by-layer procedure in this paper. The cube-like Fe 3 O 4 @SiO 2 core–shell structures were prepared via a new route and Ag nanoparticles were introduced onto their surface through a one-pot hydrothermal reaction. By controlling the reaction time, the coverage rate of Ag on the FSA surface could be tuned, and then a series of FSA composites were obtained. The SERS properties of these FSA composites were investigated using p -aminothiophenol ( p -ATP) as the probe molecule. It was found that the FSA composites synthesized with a reaction time of 6 h showed the best SERS performance, and the detection limit for p -ATP could reach 1 × 10 −7 M. For practical application, the FSA composites were also used to detect thiram, one of the dithiocarbamate fungicides that has been widely used as a pesticide in agriculture. The detection limit is as low as 1 × 10 −6 M (0.24 ppm), lower than the maximal residue limit of 7 ppm in fruit prescribed by the US Environmental Protection Agency. The resulting substrate with high SERS activity, stability and strong magnetic responsivity makes the FSA composite a perfect choice for practical SERS detection applications.
研究领域:
材料科学
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分析化学
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DOI
高影响因子
SmartMat
·
2024
·
IF 15.3
Zongkai Yan,Qi Cheng,Mengxuan Sun,Baoshan Wu,Yanlin Zhu,Zuwen Tong,Ming Li,Chunyang Jia,Panfeng Zhao
For aqueous zinc ion batteries (AZIBs), Zn dendritic growth and hydrogen evolution reaction (HER) usually result in the severe degradation of bare Zn anodes. Although the alloy-modified anodes can improve the reversibility of the Zn plating/stripping process, the regulation of alloy components is too complex to meet the requirements for large-scale fabrication. Herein, a Ni-Ag bimetallic coating on Zn foils (Ni-Ag@Zn) is prepared by magnetron co-sputtering. Owing to this bimetallic coating with the ultrathin thickness of 200 nm, the cycling life of Ni-Ag@Zn-based symmetric cells attains more than 5000 h at current density of 1 mA/cm 2 and areal capacity of 1 mA h/cm 2 , exceeding most of the reported binary/ternary-alloy-based symmetric cells. To the suppression of dendrite growth and HER, the regulation mechanism of the bimetallic coating on Zn deposition is assigned to the synergistic effect, the suppressed HER by the strong adsorption of Ag with H ions and the flatted Zn deposition via the strong adsorption of Ni/Ag with Zn ions. To our knowledge, both the bimetallic and ultrathin features have not been reported to optimize the anodes for AZIBs. The present bimetallic coating strategy renders the diversification of anode modification for the commercialization of high-performance AZIBs.
研究领域:
材料科学
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电化学
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能源存储
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DOI
高影响因子
NANOTECHNOLOGY
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2024
·Vol. 35
·期 19
·195710
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IF 2.9
Hang Chen,Caiqin Han,Le Zhang,Ying Wu
A surface enhanced Raman scattering (SERS) substrate of porous rod-shaped ferric oxide (Fe2O3) combined with silver nanoparticles (Ag NPs) and black phosphorus (Fe2O3/Ag/BP) was fabricated to detect the persistent organic pollutants (POPs) at low concentration. The organic pollutant Rhodamine 6G (R6G) was used as the probe molecule to study the performances of Fe2O3/Ag/BP, and 4-chlorobiphenyl (PCB-3) was the target of detection. The limit of detection (LOD) of R6G based on this novel SERS substrate Fe2O3/Ag/BP was as low as 1.0 × 10−15 M, which was five orders of magnitude lower than that of Fe2O3/Ag (10−10 M). The enhancement factor (EF) of Fe2O3/Ag/BP was 6.44 × 108, which was 3.1 times higher than that of porous rod-shaped Fe2O3/Ag (2.08 × 108). The Raman signal of R6G based on Fe2O3/Ag/BP had a good homogeneity, and the relative standard deviation (RSD) of Raman signal intensities of R6G at 1643 cm−1 was only 5.97%. Furthermore, the Fe2O3/Ag/BP substrate exhibited a recyclability through the photocatalytic degradation of R6G. The LOD of PCB-3 based on Fe2O3/Ag/BP was 10−9 M. Besides, Fe2O3/Ag/BP had a high SERS activity even it was kept in a centrifuge tube without requiring complicated treatment. These results highlight the potential application of Fe2O3/Ag/BP for ultra-trace detection of POPs in the environment.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2024
·
IF 3.9
Congzhi Hu,Yuye Li,Tingting Du,Youyong Pang,Yongping Liu,Botian Liu,Ling Li,Huidan Lu,Bin Huang
In this paper, a new supramolecular Z-scheme heterojunction photocatalyst, designated as Ag/Ag 3 PO 4 /Perylene diimide organic molecules after secondary acid-base self-assembly (PDI-2), was synthesized through precipitation and photoreduction techniques. Ag/Ag 3 PO 4 /60 %PDI-2 (APP-6) exhibited the best photocatalytic activity due to the synergistic effect of Z-scheme heterojunction and surface plasmon resonance (SPR) effect of Ag nanoparticles (Ag NPs). Under visible light (λ > 420 nm), the degradation efficiency of APP-6 for Rhodamine B (RhB) and Bisphenol A (BPA) was 99.7 % and 90.7 %, respectively. Additionally, PDI-2 was transformed into smaller nanoclusters, which increased the specific surface area of the photocatalyst, and reduced the charge transport distance. Moreover, APP-6 exhibited the smallest electrochemical impedance, the largest photocurrent, the smallest fluorescence lifetime. Free radical trapping experiments showed that •O 2 − was the main reactive group and a possible photocatalytic mechanism was proposed by combining the Ultraviolet–visible diffuse reflectance spectrophotometer (UV–vis DRS) and the Mott-Schottky plots.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
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2025
·Vol. 192
·期 4
·1-12
·
IF 5.3
Wu Wei,Han En,Ma Lixin,Zhou Ruiyun,Wang Chen,Bai Junwen,Cai Jianrong
A label-free surface-enhanced Raman scattering (SERS) sensor using optimal bimetallic Au@Ag nanocuboids (Au@Ag NCs) was developed for ultrasensitive detection of florfenicol residue in eggs. The Raman characteristic peaks of florfenicol detection were identified at 1145 cm −1 and 1595 cm −1 which were consistent with the theoretical Raman spectrum of florfenicol calculated by density functional theory. The Au@Ag NCs were optimized by changing the aspect ratio of Au nanorods and the thickness of Ag nanocuboids, achieving an enhancement factor of 1.69 × 10 6 for SERS signals. Under optimal conditions, the label-free SERS sensor demonstrated a broad linear range of 0.01 mg/kg to 100 mg/kg for florfenicol in real sample. The limit of detection of florfenicol in eggs was as low as 0.0410 μg/kg, and the recovery was 94.83% ~ 108.24%. Therefore, this label-free SERS sensor offers a rapid and sensitive approach for the trace detection of florfenicol residues in food safety monitoring. Graphical abstract
研究领域:
食品安全
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分析化学
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药物残留检测
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产品关联
DOI
PubMed
高影响因子
FUEL
·
2024
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IF 6.7
Yangshuo Liu,Keke Huang,Yao Meng,Chubo Wang,Liang Qiao,Wei Cai,Yaotian Yan,Xiaohang Zheng
Searching for highly efficient electrocatalysts for the hydrogen evolution reaction (HER) is principal to the development electrolytic water production industry. Experimental screening of highly active electrocatalysts is time-consuming and complicated. In this work, an Artificial Neural Network model is proposed to accelerate the screening for Ag(M) catalysts (M = Al, Si, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Mo, Ru, Rh, Pd, In, Sn, Sb, W, Re, Os, Ir, Pt, Au and Hg), which is used to predict the Gibbs free energy of hydrogen. The Ag(Ni) catalyst is identified as a potential electrocatalyst with the nearly ideal (ΔG H ), which affords the relatively low overpotentials of 159 mV for HER at 10 mA cm −2 . According to the prediction of our ANN model, we synthesized Ag(Mn), Ag(Co), and Ag(Cu) catalysts. The Ag(Ni) catalyst exhibits the best HER activity, which is 120 mV smaller than Ag(Mn), Ag(Co), and Ag(Cu) catalysts. The incorporation of Ni effectively optimizes the electronic environment of the materials, which drives the upshift of d-band center and drastically reduces the Gibbs free energy of hydrogen (ΔG H ). Our method is significantly more efficient, running 1184 times faster than the traditional DFT method. Our work paves an efficient way to design and develop potential HER catalysts.
研究领域:
材料科学
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电化学
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人工智能辅助设计
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产品关联
DOI
高影响因子
Analytical Methods
·
2024
·Vol. 16
·期 14
·2085-2092
·
IF 2.7
Yue Liu,Guanwen Su,Wei Wang,Hongyuan Wei,Leping Dang
This study proposes a microfluidic platform for rapid enrichment and ultrasensitive SERS detection of bacteria. The platform comprises ZnO nanoflower arrays decorated with silver nanoparticles to enhance the SERS sensitivity. The ZnO nanoflower array substrate with a 3D reticular columnar structure is prepared using the hydrothermal method. SEM analysis depicts the 3.05 μm gap distribution of the substrate array to intercept the most bacteria in the particle sizes range of 0.5 to 3 μm. Then, silver nanoparticles are deposited on the ZnO nano-array surface by liquid evaporation self-assembly. TEM and SEM analysis indicate nanosize of Ag particles, evenly distributed on the substrate, enhancing the SERS efficiency and improving sensing reproducibility. The probe molecules (R6G) are tested to demonstrate the high SERS activity of the proposed microfluidic sensor. Then, Escherichia coli, Staphylococcus aureus, Enterococcus faecalis, and Bacillus subtilis are selected, demonstrating the sensor's excellent bacterial capture and sensitive recognition capabilities, with a detection limit as low as 102 CFU mL−1. Additionally, the antibacterial properties of ZnO/Ag heterojunction nanostructures are studied, suggesting their ability to inactivate bacteria. Compared with the traditional Au-enhanced chip, the sensor preparation is easy, safe, reliable, and low-cost. Moreover, the ZnO nano-array exhibits a large specific surface area, high interception ability, stronger and uniform SERS performance, and effective and reliable detection of trace pathogens. This work provides potential future ZnO/Ag microfluidic SERS sensor applications for rapid, unlabeled, and trace pathogens detection in clinical and environmental applications, potentially achieving breakthroughs in early detection, prevention, and treatment.
研究领域:
生物医学工程
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分析化学
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微生物学
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产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Tian Xing,Jiawei Wang,Jiayu Zhang,Hao Liu,Lijie Xu,Wen Zhang,Ruijin Hong,Chunxian Tao,Qi Wang,Hui Lin,Zhaoxia Han,Dawei Zhang
Ag 2 O-Ag/CH 3 NH 3 PbBr 3 (MAPbBr 3 ) heterojunction composites were synthesized using a strategy that combines one-step spin coating, electron beam evaporation, and laser irradiation. Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) analyses confirmed the formation of dense and uniform nanoparticles on the sample surface after laser irradiation, as well as the successful introduction of oxygen vacancies. These nanostructures and oxygen defects contribute to the emergence of a broad plasmonic resonance absorption peak and enhance the local electromagnetic field intensity, thereby promoting stronger nonlinear optical effects. Z -scan results show that the Ag 2 O-Ag/MAPbBr 3 heterojunction composites exhibit strong saturable absorption (SA), in contrast to monolayer Ag 2 O–Ag or MAPbBr 3 , due to efficient interfacial charge transfer that suppresses reverse saturable absorption (RSA) arising from excited-state absorption and multiphoton absorption. The nonlinear optical absorption was effectively tuned by laser irradiation with different pulse widths. The maximum third-order nonlinear absorption coefficient of the heterojunction was measured to be −7.96 × 10 −7 cm/W. In addition, the finite-difference time-domain (FDTD) simulation results were in good agreement with the experimental data. These results indicate that the as-synthesized Ag 2 O-Ag/MAPbBr 3 heterojunction composites have promising potential for applications in nonlinear optical devices.
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2012
·
IF 5.625
Zhizhong Han,Lili Ren,Zhihui Cui,Chongqi Chen,Haibo Pan,Jianzhong Chen
Visible-light driven photocatalyst, Ag/ZnO flower (ZnO Fl) heterostructures, was prepared on indium doped tin oxide (ITO) glass via a simple photoreduction method without surfactants. The samples are characterized by X-ray diffraction, scan electron microscopy, X-ray photoelectron spectroscopy, UV–vis spectroscopy, photoluminescence spectra and photocurrent response. The results show that ZnO FRs are wurtzite phase with single crystalline grown along the [0 0 1] direction and Ag nanoparticles (NPs) located on the surface are metallic. The binding energy of Ag 3d for the Ag/ZnO Fls sample shifts remarkably to the lower binding energy compared with the corresponding value of pure metallic Ag attribute to the interaction between Ag and ZnO Fls. Ag/ZnO Fl heterostructures exhibit higher visible-light driven photocatalytic activity. It is suggested that photo-induced electrons are generated from Ag due to surface plasmon resonance, and transfer from Ag to ZnO Fls. Then the electrons interact with adsorbed oxygen, finally forming hydroxyl radicals ( OH), and the visible-light driven photocatalytic efficiency is enhanced. The proposed mechanism is further confirmed by the photoluminescence and transient photocurrent response. Additionally, the as-prepared Ag/ZnO Fls/ITO as a convenient photocatalytic device can be recycled without centrifugation.
研究领域:
材料科学
·
光催化
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Hao Zhang,Dongzhi Zhang,Bao Zhang,Dongyue Wang,Mingcong Tang
Recently, wearable sensors and electronic skin systems have become prevalent, which can be employed to detect the movement status and physiological signals of wearers. Here, a pressure sensor composed of mesh-like micro-convex structure polydimethylsiloxane (PDMS), MXene nanosheet/Ag nanoflower (AgNF) films, and flexible interdigital electrodes was designed by layer-by-layer (LBL) assembly. The unique microstructure of PDMS effectively increases the contact area and improves sensitivity. Moreover, AgNFs were introduced into the MXene as a “bridge,” and the synergistic effect of the two further enhanced the performance of the sensor. The pressure sensor has high sensitivity (191.3 kPa–1), good stability (18,000 cycles), fast response/recovery time (80 ms/90 ms), and low detection limit (8 Pa), so it can be used for all-round monitoring of the human body. Sensing arrays were integrated with a wireless transmitter as an intelligent artificial electronic skin for spatial pressure mapping and human–computer interaction sensing. Moreover, we develop a smart glove by a simple method, combining it with a 3D model for wireless accurate detection of hand poses. This provides ideas for hand somatosensory detection technology, leading to health monitoring, intelligent rehabilitation training, and personalized medicine.
研究领域:
生物医学工程
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材料科学
·
传感器技术
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Xuan Li,Yuyan Cao,Yihui Shen,Yulin Wu,Shicong Cui,Lingli Cheng,Xuechun Yang,Zheng Jiao
Nowadays, designing sensing materials possessing both high sensitivity and humidity resistance is still a challenge in the field of sensing materials. In this work, a ternary Ag nanoparticles decorated NiCo 2 O 4 /NiO (Ag/NiCo 2 O 4 /NiO) composite with hollow nanocage structure has been successfully obtained, which uses ZIF-67 as a template combined with self-etching method, followed by NaBH 4 reduction of silver ions. For the synergistic effect of the novel morphology, the presence of Ag nanoparticles and hydroxyl absorbent NiO, and the formation of p-p heterojunction between NiCo 2 O 4 and NiO, Ag/NiCo 2 O 4 /NiO exhibits good humidity resistance and high-sensitive to n-butanol. The mesoporous hollow nanocage morphology not only provides abundant adsorption sites for target gases, but also facilitates the diffusion of water molecules. The doping of Ag nanoparticles can regulate the adsorption of oxygen on the surface of gas sensing materials, improving the sensitivity while suppressing the hydroxyl poisoning reaction process. The hydroxyl absorbent NiO in Ag/NiCo 2 O 4 /NiO can both directly absorb water and form p-p heterojunction structure with NiCo 2 O 4 , which improves sensor performance while suppressing hydroxyl poisoning. In the gas sensing tests, the optimal Ag/NiCo 2 O 4 /NiO composites can achieve a high response value of 31.41, as well as rapid response/recovery times (65 s/47 s) to 100 ppm n-butanol at the working temperature of 170 °C. Moreover, it displays a wide detection range (1–120 ppm), a low detection limit (0.27 ppm), excellent selectivity to n-butanol, and superior long term stability (maintaining a response value of 84.68 % after 14 days). Notably, the optimal Ag/NiCo 2 O 4 /NiO demonstrates great humidity-tolerant ability with a response values fluctuation of 16 % under the range of 33 %-80 % relative humidity. This research provides a feasible approach for designing practical gas sensing materials with high sensitivity and moisture resistance.
研究领域:
材料科学
·
纳米技术
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气体传感
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化学传感器
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环境监测
✓ 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）