JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Wenlong Tu,Haodong Li,Bo Li,Jie Cheng,Ping Xu,Wuxiang Zhang,Zengjing Guo,Jing Zhao,Fanghua Li,Yiyan Song,Fu Yang
The increasing complexity of environmental pollution posed a higher requirement for the development of environment-governed functional materials . Herein, to achieve desired synergy and multiple functionalities of eco-friendly nanomaterials , a micelle-mediated metal assembly strategy was proposed to integrate plasmonic Ag nanoparticles into MnO x modified mesoporous silica hosts by metal-modified neutral dodecyl amine surfactant , correspondingly, a multifunctional mesoporous Ag@MnOx/m-SiO 2 (AMSs) nanocomposite was obtained. The characterization results revealed that the introduction of Mn and alteration in the amount of Ag mediated the formation of a special mesostructure and nanometric morphology of the silica host. Bearing a low Ag loading (r.t. of Ag/Mn = 1/2), ultrafine Ag nanoparticles were embedded in the inner core of mesoporous silica nanospheres . While assembly with a higher Ag concentration affected the morphology of the obtained AMSs and resulted in rich Ag nanoparticles on the exterior surface of mesoporous silica. By this strategy, ultrafine Ag nanoparticles and well-dispersed amorphous MnO x species were coupled into the mesoporous silica to reach a special configuration and integrated functionality. The obtained AMSs-3 can effectively inactivate bacteria ( E. coli , S. aureus, and P. aeruginosa ) with a prolonged inhibitory effect, rapidly reduce harmful nitrophenol, as well as photothermally assist water evaporation (evaporation rate of 1.51 kg m −2 h −1 , receiver efficiency of 87%). This work provides versatile environment-governing functional nanomaterials for both highly effective antimicrobial and environmental remediation.
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高影响因子
Biosensors-Basel
·
2022
·Vol. 12
·期 6
·387
·
IF 5.743
Sen Li,Defu He,Shuning Li,Ruipeng Chen,Yuan Peng,Shuang Li,Dianpeng Han,Yu Wang,Kang Qin,Shuyue Ren,Ping Chen,Zhixian Gao
Bisphenol A (BPA) has emerged as a contaminant of concern because long-term exposure may affect the human endocrine system. Herein, a novel aptamer sensor based on magnetic separation and surface-enhanced Raman scattering (SERS) is proposed for the extremely sensitive and specific detection of trace BPA. Moreover, the capture unit was prepared by immobilizing thiolated (SH)-BPA aptamer complementary DNA on AuNP-coated magnetic halloysite nanotubes ([email protected]), and SH-BPA aptamer-modified[email protected]@Ag core–shell SERS nanotags acted as signal units. By the complementary pairing of the BPA aptamer and the corresponding DNA,[email protected]and[email protected]@AgCS were linked together through hybridization-ligation, which acted as the SERS substrate. In the absence of BPA, the constructed aptamer sensor generated electromagnetic enhancement and plasmon coupling to improve the sensitivity of SERS substrates. Owing to the high affinity between BPA and the aptamer, the aptamer probe bound to BPA was separated from the capture unit by an externally-induced magnetic field. Thus, the Raman intensity of the[email protected]@AuCS core–satellite assemblies was negatively correlated with the BPA concentration. High sensitivity measurements of BPA might be performed by determining the decline in SERS signal strength together with concentration variations. The proposed aptasensor is a promising biosensing platform for BPA detection.Keywords:surface-enhanced Raman scattering (SERS);aptasensor;bisphenol A;core–satellite assemblies
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高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 7
·1063
·
IF 5.719
Guannan Yang,Shaogen Luo,Tao Lai,Haiqi Lai,Bo Luo,Zebo Li,Yu Zhang,Chengqiang Cui
In this work, we developed an eco-friendly and facile microvia filling method by using printing and sintering of Cu-Ag core-shell nano-microparticles (Cu@Ag NMPs). Through a chemical reduction reaction in a modified silver ammonia solution with L-His complexing agent, Cu@Ag NMPs with compact and uniform Ag shells, excellent sphericity and oxidation resistance were synthesized. The as-synthesized Cu@Ag NMPs show superior microvia filling properties to Cu nanoparticles (NPs), Ag NPs, and Cu NMPs. By developing a dense refill method, the porosity of the sintered particles within the microvias was significantly reduced from ~30% to ~10%, and the electrical conductivity is increased about twenty-fold. Combing the Cu@Ag NMPs and the dense refill method, the microvias could obtain resistivities as low as 7.0 and 6.3 μΩ·cm under the sintering temperatures of 220 °C and 260 °C, respectively. The material and method in this study possess great potentials in advanced electronic applications.Keywords:Cu-Ag core-shell nano-microparticles;microvias;vertical interconnection;blind hole filling;sintering
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高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 24
·245601
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IF 3.953
Guangming Xu,Xilong Shen,Lei Zhang,Jie Tang,Chuan He,Ziqiang Zhou,Tian Xu,Meifeng Xu,Yonglong Jin,Chaonan Wang
In this study, we developed a flexible and transparent silver/polystyrene/polydimethylsiloxane (Ag/PS/PDMS) substrate with both high density of hot spots and satisfactory uniformity using a cost-effective approach. Via template-guided self-assembly, PS beads were arranged regularly in nanobowls of a square array on PDMS, whose surface structure was transferred from a commercial complementary metal oxide semiconductor chip. Roughness was introduced onto the PS bead surface by nitrogen plasma treatment, followed by sputtering of Ag which generated many hot spots. Differential roughness on the PS bead surface greatly influenced the morphology of the Ag/PS/PDMS substrate. A meat-ball like surface structure was formed with a plasma etching time of 5 min, whose growth mechanism was proposed based on the scanning electron microscope analysis. The high sensitivity and desirable uniformity of the meat-ball like Ag/PS/PDMS substrate were demonstrated by using crystal violet as a Raman reporter, exhibiting an enhancement factor of 2.7 × 107 and a relative standard deviation of 5.04%. Thiram of a lower concentration than the maximum residue limit on the cucumber surface could easily be detected in situ by the proposed substrate, demonstrating its great potential for in-situ food safety analysis.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Chuankun Yin,Aimal Khan,Qiaohui Gao,Quan Li,Xiaoyun Zhou,Xiuying Liu,Aihua Xu,Xiaoxia Li
Recently, the development of efficient mixed metal oxide catalysts for organic pollutants degradation via peroxymonosulfate (PMS) activation is a hot topic in the area of wastewater treatment . In this work, the silver-copper mixed-oxide, Ag 2 Cu 2 O 3 (ACO) was reported for the first time as a highly active catalyst for removing organic pollutants in the presence of PMS. ACO was successfully synthesized from Ag + and Cu 2+ ions at 60 °C, and its structure was strongly influenced by the temperature. The catalyst could almost completely remove p -nitrophenol and other pollutants with 0.65 mM PMS after 20 min, and also exhibited satisfactory stability and recyclability. The system efficiency was shown to vary with the concentration of PMS and catalyst, as well as solution pH. Scavenger experiment and EPR analysis indicated that radicals produced by the oxidation of Ag(I) and Cu(I) with PMS could promote degradation reaction. The synergistic effect between Cu and Ag in the bimetallic catalyst was demonstrated to contribute to the high performance: Cu(II)-O-Ag(I) bonds promote the conversion of Cu(II) species to Cu(I) through reaction with PMS, and facilitate the oxidation of Cu(I) and Ag(I) by PMS to generate active radicals. The study provides a feasible strategy to design efficient and stable bimetal oxide catalysts for PMS activation.
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高影响因子
CELLULOSE
·
2022
·Vol. 29
·期 4
·2525-2537
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IF 6.123
Liang Chunliu,Zang Limin,Shi Fangfang,Yang Chao,Qiu Jianhui,Liu Qifan,Chen Zhenming
Cotton fabric (CF) fabricated by natural cellulose fibers has porous structure, abundant hydrophilic hydroxyl groups and good mechanical flexibility, which is a promising substrate for flexible fabric-based supercapacitors. Graphene oxide (GO) nanosheets were fixed on the CF by vacuum filtration, and then the pyrrole monomers and silver ions (Ag + ) were adsorbed to the surface of GO/CF by π-π and electrostatic interactions, respectively. Polypyrrole/silver (PPy/Ag) nanoparticles were generated on the surface of GO/CF via in situ UV-induced polymerization, forming the flexible PPy/Ag/GO/CF electrodes. The electrodes combine three active materials (PPy, Ag and GO), which show good electrochemical performance. The electrode prepared under optimum conditions (UV irradiation time: 120 min; mass loading of GO on the CF: 3 mg cm −2 ) exhibits a high specific capacitance of 1664.0 mF cm −2 . The flexible symmetric quasi-solid-state fabric-based supercapacitor (QFSC) based on the optimum electrode also keeps superior electrochemical performance and excellent mechanical flexibility, which has a great application prospect for wearable energy storage devices.
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COLLOIDS AND SURFACES B-BIOINTERFACES
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2022
·
IF 5.999
Dongdong Li,Jing Zhao,Jun Ma,Huiquan Yang,Xiaodong Zhang,Yuyu Cao,Peidang Liu
Radiotherapy is one of the main treatment modalities for glioma, but the therapeutic efficacy is often limited by the radioresistance of tumor cells. The radiosensitization effects of silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs) on tumors have been confirmed by previous studies. To enhance the specific killing effect of irradiation on tumor cells, targeted modification of radiosensitizers is urgently needed. Herein, we developed polyethylene glycol (PEG)-coated [email protected] core-shell nanoparticles (PSGNPs) modified with GMT8 aptamer (GSGNPs) and evaluated their radiosensitization effects on glioma cells through in vivo and in vitro experiments. Transmission electron microscope image showed that the prepared PSGNPs had a spherical core-shell structure with an average size of 11 nm. The ultraviolet-visible absorption spectra and Fourier transform infrared spectra displayed that GMT8 was successfully conjugated to PSGNPs. The results of dark-field imaging revealed that the targeting ability of GSGNPs to U87 glioma cells was much better than that to normal human microvascular endothelial cells. Additionally, it was also found that the endocytic pathways of GSGNPs mainly involved clathrin-mediated endocytosis and macropinocytosis . The sensitization enhancement ratio of GSGNPs was calculated to be 1.62, which was higher than that of PSGNPs. In vivo imaging results showed that GSGNPs exhibited good tumor targeting and retention capabilities, and the fluorescence intensity ratio of Cy5-GSGNPs to Cy5-PSGNPs reached a peak at 4 h after injection. More importantly, the median survival time of mice bearing U87 glioma was significantly prolonged after intravenous administration of GSGNPs combined with radiotherapy. This work demonstrated that GSGNPs could be used as an effective nano-radiosensitizer for targeted radiotherapy of glioma.
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高影响因子
Journal of Environmental Chemical Engineering
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2022
·
IF 7.968
Haiyang Fan,Guiyun Yi,Zhengting Zhang,Xiuxiu Zhang,Peng Li,Chuanxiang Zhang,Lunjian Chen,Yulong Zhang,Qi Sun
Herein, we successfully fabricated the Ag deposited BiVO 4 (ABVO) electrode via the combination of electrodeposition and photodeposition for efficient photoelectrocatalytic degradation of β-naphthol under visible-light illumination (λ > 420 nm). The photocurrent density of ABVO photoanode was around 1.6 times higher than that of BiVO 4 (BVO) under visible-light irradiation at 1.5 V vs. Ag/AgCl, which was ascribed to the reduced recombination rate of photoinduced electron-hole pairs, as confirmed by electrochemical impedance spectroscopy (EIS) and Mott-Schottky plots. Additionally, the photoelectrocatalytic (PEC) degradation rate of β-naphthol (10 mg L −1 , 300 mL) by ABVO could approximately reach 80%, whose corresponding kinetic constant was 1.56 times higher than BVO. Based on the radical quenching experiments and EPR results, the •OH and •O 2 - radicals played crucial roles in PEC degradation of β-naphthol. The enhanced PEC performance of ABVO can be ascribed to the synergy of photocatalysis , electrocatalysis and the localized surface plasmon resonance (LSPR) effect of deposited Ag particles, which can effectively suppress the recombination of photoinduced electron-hole pairs, thereby prolonging the photo-excited charges lifespans and promoting the PEC performance. Furthermore, the ABVO photoanode possesses excellent recyclability , outstanding stability and strong resistance to acid and alkali, which can be a promising candidate for PEC organic contaminants degradation.
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ACS Applied Energy Materials
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2022
·
IF 6.959
Qian Lin,Yafei Hou,Yaqian Zheng,Yina Tan,Peng Du,Laihui Luo,Weiping Li
To fabricate the polymer-based nanocomposites with excellent energy storage performances for high-temperature applications, hierarchical x wt % Ag@Al2O3 nanofibers (Ag@AO NFs) are designed and prepared, where various Ag nanoparticles (x wt %) are filled into the Al2O3 nanofibers. By adjusting the weight fraction of Ag nanoparticles, the coupling effects of interfacial polarizations and interfacial barrier at Ag/AO interfaces are explored and optimized; excellent energy storage performance was obtained in the 0.50 wt % Ag@AO/PEI nanocomposite. Owing to the high insulation and high thermal conductivity of Al2O3 nanofibers, a stable energy storage performance is realized within 25–150 °C. For example, the 0.50 wt % Ag@AO/PEI nanocomposite delivers an excellent discharge energy density of 6.1 J/cm3 with charge–discharge efficiency of 89.2% at 413.4 MV/m, which is twice as large as that of the pure PEI (3.0 J/cm3 at 382.4 MV/m, 74.6%). This structural design might provide a feasible solution for realizing enhanced energy storage performance at low filler fraction for high-temperature application.
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Advanced Healthcare Materials
·
2021
·Vol. 11
·期 10
·2102682
·
IF 9.933
Dongxu Ma,Baiqi Chen,Yuanfang Li,Xueyuan Pang,Quanying Fu,Zihan Xiao,Zhonghong Shi,Xiaolei Li,Chongdai Luo,Zhang-kai Zhou,Yin Chen,Jianhua Zhou
The development of easy-to-use, low-cost, and visualized detection platforms for screening human dental caries and periodontal diseases is in urgent demand. In this work, a Au@Ag nanorods-poly(dimethylsiloxane) (Au@Ag NRs-PDMS) wearable mouthguard, which can visualize the tooth lesion sites through the color change of it at the corresponding locations, is presented. The Au@Ag NRs-PDMS composite exhibits a distinct color response to hydrogen sulfide (H 2 S) gas generated by bacterial decay at the lesion sites. Moreover, the Au@Ag NRs-PDMS mouthguard is demonstrated to own desired mechanical properties, excellent chemical stability, as well as good biocompatibility, and can accurately locate the lesion sites in human oral cavity. These findings suggest that the mouthguard has the potential to be utilized on a large scale to help people self-monitor their oral health in daily life, and treat oral diseases locally.
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高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Xiaokun Zhu,Shuaizhao Jin,Xiaohan Yu,Zhiyuan Yu,Xin Gu,Xiaoli Guan,Kaikai Wu,Yixin Yan,Liming Zhao,Jiamei Han,Jiabin Jiang,Xiang Liu,Xiangming Li
In this study, La 0.7 Ag 0.3- x K x MnO 3 (LAKMO, x = 0.15, 0.16, 0.17, 0.18, and 0.19) films with excellent electrical properties and low surface roughness were prepared on SrTiO 3 ( 0 0 1 ) substrates using the spin-coating method. The crystal structures and ion valence states of the LAKMO films were modified by adjusting the doping amounts of Ag and K. The Jahn–Teller effect and electron–lattice coupling were enhanced with the MnO 6 octahedron undergoes distortion. Moreover, the double-exchange interaction was improved with an increase in the number of Mn 4+ /Mn 3+ ion pairs. Under the influence of these factors, the electrical transport properties especially the temperature coefficient of resistivity ( TCR ) of the LAKMO films can be refined modulated or optimized via A-site Ag and K co-doping. When x = 0.17, the maximum TCR of LAKMO reached 11.23 % K −1 at 293.23 K. Thus, La 0.7 Ag 0.13 K 0.17 MnO 3 film with a large TCR exhibited excellent thermal properties at room temperature and was considered material for application to uncooled infrared bolometers.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Yongkang Shi,Yan Nie,Hualong Xu,Pengyu Bi,Boyang Chen,Xinyue Hou,Hongchao Ma,Meiwen Cao
Surface coating technology is an effective anti-corrosion strategy which can form a layer of anti-corrosion film on metal surface , effectively preventing it from oxidation and corrosion. Among various strategies, silanization treatment of metals is the most commonly used one. However, using silane-based coatings alone often leads to poor anti-corrosion performance due to insufficient mechanical strength and presence of surface defects . In order to improve the corrosion resistance of silane coatings, a hybrid surface coating has been constructed by introducing epoxy resin and Ag/TiO 2 nanoparticles into the silane film in this work. After adding epoxy resin, the thickness of the silane film greatly increases, which improves its mechanical properties . Ag/TiO 2 nanoparticles can enhance the cross-linking between silane molecules and epoxy resin, thereby preventing formation of surface defects. The epoxy resin-silane-Ag/TiO 2 composite surface coating is coated on the surface of AA2024 aluminum alloy using spin coating method. Electrochemical and salt spray tests indicate excellent corrosion resistance performance of the composite coating . This composite coating technology may have potential applications on the surfaces of various metal products such as medical devices and aerospace materials, and will shed light on the development of new surface coating technologies.
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危险品化学品经营许可证（带存储）