Nanoscale
·
2025
·
IF 5.1
Chuwei Zhu,Yuxi Li,Tailei Hou,Xiaole Gu,Xinyuan Li,Le Sang,Jiatao Zhang
Recent advances in microreactor technology have established these systems as promising platforms for colloidal nanocrystal synthesis. Nevertheless, the continuous production of high-quality doped quantum dots (QDs) with precise control over optical properties continues to present significant technical challenges. This study introduces a micropacked bed (MPB) intensified tube microreactor system for the efficient and continuous synthesis of Ag+ doped CdS QDs (CdS:Ag+ doped-QDs). Through systematic optimization of reaction parameters, the MPB system achieved photoluminescent quantum yield (PLQY) of 50.8% under optimized conditions (18 cm MPB filled with 2.0 mm glass beads, 0.2 mL/min flow rate, and 70 °C reaction temperature), and the yield increased to 64.6%. These results represent significant improvements over the traditional batch flask method (40% PLQY, 43.01% yield) and the microreactor method (43% PLQY, 48.41% yield). The developed MPB system demonstrates multiple operational advantages: reaction duration reduced to 30 minutes, simplified fluidic architecture requiring only two pumps (vs. three in conventional systems), and enhancement in flow rate (0.2 mL/min vs. 40 μL/min). Production capacity analysis revealed 6-fold and 2.67-fold increases in CdS:Ag+ doped-QDs output compared to batch flask method and microreactor method, respectively, per unit time. This continuous flow strategy establishes a viable pathway for industrial-scale synthesis of doped quantum dots with enhanced process efficiency and material quality.
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高影响因子
iScience
·
2025
·
IF 4.1
Yangfan Du,Keyi Han,Mingqing Zhang,Xinyu Zhao,Xin Zhang,Yingbin Liang,Jie He,Shifeng Wang,Yong Li
Environmental pollution poses a pressing global challenge, and photocatalysis represents a promising remediation technology. However, photogenerated carrier recombination remains a critical limitation. In this work, silver quantum dots (Ag QDs) were anchored onto sea urchin-like TiO 2 (U-TiO 2 ) to construct an Ag–TiO 2 interfacial electron transfer channel. This channel facilitated rapid carrier separation and migration, thereby effectively suppressing recombination. Moreover, the Ag QDs exhibited a pronounced localized surface plasmon resonance (LSPR) effect that broadened the light absorption range into the visible and near-infrared regions. Under LSPR excitation, the electron chemical potential in Ag QDs was elevated, further enhancing photocatalytic activity. Additionally, the unique urchin-like morphology of U-TiO 2 provided a large specific surface area, enhancing pollutant adsorption and offering abundant reactive sites. Benefiting from the synergy between the interfacial electron transfer channel and LSPR, the Ag QD–modified U-TiO 2 photocatalyst exhibited outstanding degradation performance and great potential for environmental purification applications.
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高影响因子
SENSORS
·
2025
·Vol. 25
·期 7
·2316
·
IF 3.5
Jianjun Ding,Niansong Liu,Ganglin Wang,Naiyu Guo,Chao Sun
In response to the shortcomings of traditional surface-enhanced Raman spectroscopy (SERS) substrates, such as short shelf life, poor uniformity, and low selectivity, this study innovatively proposed a three-dimensional composite substrate of CNTs/Ag/AgNWs/SiO 2 . This substrate demonstrates excellent SERS enhancement effects, with a detection limit of 10 −12 mol/L for the probe molecule Rhodamine 6G (R6G) and an enhancement factor (EF) of 8.947 × 10 8 . Further experiments confirmed the substrate’s superior uniformity and stability. The enhancement mechanism was investigated using both experimental methods and the Finite Difference Time Domain (FDTD) approach. When commonly used pesticide thiram was used as the target analyte, the detection limit of the substrate reached 0.1 mg/L, which is significantly lower than the pesticide residue standards of China and the European Union. Additionally, the genetic algorithm (GA)-optimized Back Propagation (BP) neural network was introduced for the quantitative analysis of thiram concentrations. The experimental results indicated that the GA-BP algorithm achieved the training prediction accuracy of 92.5% for thiram, demonstrating good network performance. This method shows good selectivity and has broad application prospects in the detection of toxic chemicals, environmental pollutants, and food additives.
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Nanomedicine
·
2019
·
IF 4.717
Chenghao Gao,Hao Cheng,Na Xu,Yong Li,Yangmengfan Chen,Yong Wei,Biao Gao,Jijiang Fu,Kaifu Huo,Wei Xiong
Aim: To create polydopamine (PDA) and Ag nanoparticle-loaded TiO2 nanotubes coating on titanium (Ti) alloy. Materials & methods: TiO2-PDA-Ag coating was fabricated on Ti implants by electrochemical anodization. The in vitro and in vivo bactericidal and antibiofilm activities were tested. Intracellular reactive oxygen species (ROS) and antioxidative capability were measured, and cell proliferation, adhesion and cell morphology were characterized. Results: TiO2-PDA-Ag coating showed satisfactory bactericidal and antibiofilm activities in vitro and in vivo, improved Ag release pattern, evident ROS scavenging properties and enhanced cell adhesion and proliferation. Conclusion: Our study successfully fabricated a PDA and Ag nanoparticle-loaded TiO2 nanotubes coating on Ti alloy. The improved Ag release kinetics and ROS-scavenging properties achieve an optimal balance between antibacterial ability and biocompatibility.
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高影响因子
JACS Au
·
2025
·
IF 8.7
Zan Xu,Chenchen Yang,Rongbao Feng,Xue Bai,Yingzhu Zi,Xinhao Cai,Yueteng Zhang,Wuxi zhang,Weiyu Lin,Junxiao Wu,Lingjia Weng,Yangke Cun,Yue Liu,Jianbei Qiu,Zhiguo Song,Jiayan Liao,Anjun Huang,Zhengwen Yang
Double perovskites (DPs) are the latest addition to inorganic photochromic materials and show enormous potential with their fascinating optoelectronic properties and lead-free environmental friendliness. However, real-time reversible optical modulation combining the excellent optoelectronic properties of DPs and photochromism has various limitations, including how to achieve photochromism and acceleration of the response rate. Herein, we have developed a type of rare-earth-doped Ba2LaNbO6: Yb3+, Er3+, Ag+ (BLNO) phosphor, which demonstrates a remarkably fast and obvious photochromic response within 1 s. This work accelerates nearly 2 orders of magnitude of response speed of non-phase-change category photochromism in DP oxides over the previous studies. Furthermore, through experimental characterization, we revealed Ag+ effectively increases the two main elements for photochromism─defects and carriers. The mechanism of defect formation energy reduction as well as the creation of new deep traps is also discussed through the theoretical calculation method. Finally, we demonstrate the high-speed dual-mode optical information storage based on BLNO flexible thin film through mask patterning and handwriting.
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高影响因子
OPTICS EXPRESS
·
2019
·Vol. 27
·期 3
·3000-3013
·
IF 3.561
Wen Yang,Zhen Li,Zhengyi Lu,Jing Yu,Yanyan Huo,Baoyuan Man,Jie Pan,Haipeng Si,Shouzhen Jiang,Chao Zhang
In recent years, biomaterials have increasingly attracted attention on surface-enhanced Raman spectroscopy (SERS) due to their well Raman performance while metal particles are combined with biological substrates. Therefore, we propose an environmentally friendly substrate based on silver-plated cicada wings with seamless graphene layer (Gr-AgNPs-C.w.), which can be prepared with a simple and inexpensive method. Compared with AgNPs-C.w., Gr-AgNPs-C.w. hybrids show better SERS performance with high sensitivity, good uniformity and good stability with R6G detection. The minimum detected concentration can reach 10−15 M, and the value of R2 can reach 0.996, respectively. Theoretical simulation demonstrates the situation of electromagnetic field through COMSOL software. In addition, due to the affinity of graphene for biomolecules, we can successfully detect the DNA biomolecules through a simple process. Therefore, this cheap and efficient natural SERS substrate has great potential for a considerable number of biochemical SERS applications and can broaden the way in which multiple SERS platforms derived from other natural materials are prepared.
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JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Qian-Qian Li,Yang Li,Heng Mao,Yan-Mei Zhang,Qiu-Ying Zhang,Xin-Ru Chen,Zi-Cong Shan,Xian-Zhe Zhou,Li-Hao Xu,Zhi-Ping Zhao
Mixed matrix membranes (MMMs) have emerged as a critical platform for molecular separation, especially carbon capture from point-emission sources. In this study, a series of novel MMMs were fabricated by incorporating the bimetallic Ag/Zn-ZIF-8 nanoparticles into the poly (ether-block-amide) (Pebax) matrix for efficient CO 2 /N 2 separation. The SEM, EDS, XRD, FTIR, XPS, TGA, N 2 adsorption-desorption measurements were employed to elucidate the microstructures and physicochemical properties of the resultant nanoparticles and membranes. The bimetallic coordination-induced optimization modulated the inherent structure of ZIF-8 framework and enhanced CO 2 affinity, thereby forming the CO 2 -selective transport channels over N 2 . The incorporation of Ag + promoted the uniform dispersion of Ag/Zn-ZIF-8 nanoparticles in Pebax matrix, indicating the excellent polymer-filler interfacial compatibility. Impressively, the resulting membrane achieved the superior separation performance with a CO 2 permeability of 359 Barrer and a CO 2 /N 2 selectivity of 53, which were 2.5 and 1.4 times higher than that of the pristine Pebax membrane. Besides, the introduction of Ag/Zn-ZIF-8 nanoparticles enhanced the thermal and mechanical stability of the membrane, ensuring the potential for long-term operation. These findings herein advance the rational design and preparation of high-performance MMMs for sustainable carbon capture.
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AICHE JOURNAL
·
2025
·
IF 4
Xueqi Shi,Kai Liu,Na Wang,Qiuyan Ding,Zhenyu Zhao,Hong Li,Xin Gao
The actual applications of extraction methods for α -olefins separation are limited by their long time and high energy consumption. Hence, this study employs microwave technology to intensify the extraction process using Ag-based ionic liquid (Ag-IL), where the influence of microwave irradiation and the mechanism of microwave-assisted ionic liquid extraction (MAILE) are investigated, along with a comprehensive techno-economic analysis of process feasibility. The results of COSMO-RS and DFT simulations demonstrate the dominant role of π-complexation in identifying Ag-IL with high selectivity, indicating the possible enhancement caused by microwave irradiation. The subsequent kinetic experiments show that compared with conventional routes, the MAILE accelerated the extraction process by approximately 89.72%. As a result, the total annual cost of unit product of the overall process is reduced by 6.43% according to techno-economic analysis by Aspen Plus, indicating that MAILE is a cost-effective, scalable, and sustainable approach to α -olefin separation, offering process efficiency and environmental sustainability.
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INFRARED PHYSICS & TECHNOLOGY
·
2025
·
IF 3.4
Tingzhen Chen,Quanjiang Lv,Siwei Liu,Haigang Hou,Guiwu Liu,Junlin Liu,Guanjun Qiao
The advancement of infrared-visible compatible stealth materials is pivotal for strengthening national defense security and driving the next frontier in stealth material technologies. Here, we propose a modification strategy for Al/porous SiO 2 (Al/p-SiO 2 ) composite films by incorporating Ag particles to modulate their spectral response, thereby achieving infrared-visible compatible stealth. The most outstanding Al/p-SiO 2 /Ag-20 exhibits excellent thermal stability, with emissivity of 0.27 in the mid-wave infrared (3-5 μm) and 0.19 in the long-wave infrared (8-14 μm) bands. In addition, compared with Al/p-SiO 2 , its visible reflectivity is reduced by 0.35, reaching as low as 0.38 (380-780 nm). To meet diverse application requirements, flexible and patterned Al/p-SiO 2 /Ag-20 composite film was fabricated, exhibiting excellent stealth performance, particularly suitable for wearable devices and fabrics. It is worth mentioning that the fabrication of Al/p-SiO 2 /Ag composite films only requires a simple, low-cost and scalable process, which provides a solid foundation for large-scale application of infrared-visible compatible stealth materials.
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Royal Society Open Science
·
2019
·Vol. 6
·期 9
·
IF 2.515
Shang Wang,Zhaolian Han,Tingting Di,Rui Li,Siyuan Liu,Zhiqiang Cheng
The pod-shaped TiO2 nano burst tubes (TiO2 NBTs) were prepared by the combination of electrospinning and impregnation calcination with oxalic acid (H2C2O4), polystyrene (PS) and tetrabutyl titanate. The silver nanoparticles (AgNPs) were loaded onto the surface of TiO2 NBTs by ultraviolet light reduction method to prepare pod-shaped Ag@TiO2 NBTs. In this work, we analysed the effect of the amount of oxalic acid on the cracking degree of TiO2 NBTs; the effect of the concentration of AgNO3 solution on the particle size and loading of AgNPs on the surface of TiO2 NBTs. Scanning electron microscopy and transmission electron microscopy investigated the surface morphology of samples. X-ray diffraction and X-ray photoelectron spectroscopy characterized the structure and composition of samples. Rhodamine B (RhB) solution was used to evaluate the photocatalytic activity of pod-shaped TiO2 NBTs and Ag@TiO2 NBTs. The results showed that TiO2 NBTs degraded 91.0% of RhB under ultraviolet light, Ag@TiO2 NBTs degraded 95.5% under visible light for 75 and 60 min, respectively. The degradation process of both samples was consistent with the Langmuir–Hinshelwood first-order kinetic equation. Therefore, the catalytic performance of the sample is: Ag@TiO2 NBTs > TiO2 NBTs > TiO2 nanotubes.
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Journal of Energy Storage
·
2022
·
IF 8.907
Wenxing Luo,Xiaowu Hu,Yinhui Che,Shuai Zu,Qinglin Li,Xiongxin Jiang,Dingjun Liu
Phase change materials (PCMs), which exhibit significant capacity of latent heat absorption and release during the phase change process , have been promisingly used for solar energy conversion and storage. However, the application of organic PCMs for solar energy storage remains a great challenge owing to their low thermal conductivity and liquid leakage problem. In this work, a form-stable PCM with polyethylene glycol (PEG) and epoxy resin (EP) was prepared by melt blending (the mass ratio is 1:1). The experimental results indicated that the leakage problem of PEG was solved by the cross-linking of the molecular chains of PEG and EP. Meanwhile, in order to improve the solar energy conversion capability and thermal conductivity , an extremely low loading (4 wt%) of expanded graphite (EG) modified with Ag nanoparticle was added into the PEG/EP matrix. The results suggested that Ag nanoparticles were uniformly dispersed by electroless silver plating in the surface of EG, and the electroless modified EG was evenly distributed in the PEG/EP matrix. Moreover, the composite fillers exhibited prominent solar energy conversion capability (90.7 %) and higher thermal conductivity (121 %). Therefore, this novel composite has favorable potential in practical applications of solar energy storage.
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TRIBOLOGY INTERNATIONAL
·
2017
·
IF 2.903
Zhengfeng Jia,Zhengqi Wang,Chao Liu,Limin Zhao,Junjie Ni,Yuchao Li,Xin Shao,Chao Wang
Silver/polydopamine (Ag/PDA) nanocomposite powders were synthesized by dropping the AgNO 3 solution into aqueous solution containing dopamine (DA) molecules. The friction and wear properties of oil-acid (OA) modified Ag/PDA composites as additives in poly-alpha-olefin (PAO) base oil were measured using four-ball tribometer under different loads. The results show that the PAO containing OA modified Ag/PDA nanoparticles (OAMAgPDA) exhibit a better tribological property than pure PAO. The maximum decrease in wear scar diameter (WSD) and friction coefficient are amounted to 40% and 30%, respectively. The tribofilm containing C, O, N, Ag and Fe exists and plays an important role on reducing friction and increasing wear resistance.
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