Nanomaterials
·
2022
·Vol. 12
·期 11
·1909
·
IF 5.719
Chu-Ya Wang,Qi Zeng,Li-Xia Wang,Xin Fang,Guangcan Zhu
Based on the low utilization rate of visible light and the high-charge carriers-recombination efficiency of bismuth oxybromide (BiOBr), in this work, noble metal Ag was used to modify BiOBr, and Ag-doped BiOBr nanoplates (Ag-BiOBr) were obtained through a one-step hydrothermal method. Compared with BiOBr, the absorption edge of Ag-BiOBr showed a redshift from 453 nm to 510 nm, and the absorption efficiency of visible light was, obviously, improved. Bisphenol A (BPA) was chosen as the target pollutant, to evaluate the photocatalytic performance of the samples. Ag0.1-BiOBr showed the highest degradation efficiency. The intrinsic photocatalytic activity of Ag0.1-BiOBr, under visible light, was approximately twice as high as that of BiOBr. In this way, a new visible-light-driven photocatalyst was proposed, to fight against organic pollution, which provides a promising strategy for water and wastewater treatment.Keywords:bismuth oxybromide (BiOBr);Ag-doping modification;visible light;charge separation;bisphenol A (BPA)
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RSC Advances
·
2015
·Vol. 5
·期 97
·79342-79347
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IF 3.84
Xingrong Xiao,Hui Yang,Nuoxin Xu,Liang Hu,Qilong Zhang
Ag@TiO2 core–shell nanoparticles were synthesized as fillers using a simple vapor-thermal method. Based on the nanoparticles, the P(VDF-HFP)/Ag@TiO2 hybrid films were first prepared by embedding Ag@TiO2 nanoparticles in a poly(vinylidene fluoride co-hexafluoropropylene) [P(VDF-HFP)] matrix. Microstructural and thermal analysis confirmed that Ag nanoparticles had been successfully coated by TiO2 shells and that the thickness of the shell layer was about 8–10 nm. The Ag@TiO2 nanoparticles act as nucleation sites to promote crystallization of the polymer matrix without changing its structure. The P(VDF-HFP)/Ag@TiO2 composite exhibited enhanced dielectric properties over a wide frequency range, and the dielectric permittivity of the polymer nanocomposites is enhanced by ∼300% over the P(VDF-HFP) matrix at a low filler loading of 10 vol%. Moreover, P(VDF-HFP)/Ag@TiO2 also exhibit a higher dielectric constant than P(VDF-HFP)/Ag, P(VDF-HFP)/TiO2 and P(VDF-HFP)/Ag/TiO2 blend composites while maintaining a low loss tangent (below 0.03 at 1 kHz) to achieve a duplex polarization effect.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Yingjie Zhan,Bingfei Nan,Xiaole Zheng,Mangeng Lu,Jun Shi,Kun Wu
Here, inspired by the traditional Chinese cuisine Ma Lao, aramid nanofiber (ANF) decorated by silver nanoparticles (ANF@Ag) is prepared via in-situ depositing process of Ag ions on the surface of ANF based on dopamine chemistry reduction method. MXene/ANF@Ag nanocomposite films with various MXene concentrations are further prepared via a vacuum-assisted self-assembly strategy. ANF@Ag is designed as the organic-inorganic hybrid thermal conductive chains, while Ag nanoparticles not only play a role in heat transfer, but also catalyze the carbonization process and form massive inert gas during the combustion. Surprisingly revealing that toxic gases effectively catalyzing into friendly non-toxic carbon dioxide (CO 2 ) and forming the CO 2 molecular fire extinguisher-like effect, which are suitable for the development of ecological sustainability. The 5-MXene/ANF@Ag nanocomposite film shows excellent flame retardant properties, and the total heat release (THR) is only 0.1 kJg −1 . Meanwhile, the high in-plane thermal conductivity of 5-MXene/ANF@Ag is 18.56 W·m −1 ·K −1 , which is enhanced about 4.97 times higher than pure ANF film. It can be ascribed to the hydrogen bonding interactions and synergistic bridging effects from the MXene nanosheets and thermal conductive chains of rigid ANF@Ag. Therefore, this work displays a novel tactic to provide favorable interfacial interactions for the uninflammable thermal management materials.
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Nanoscale Advances
·
2018
·Vol. 1
·期 2
·840-848
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IF 0
Xiaoxin Wang,Wuzhu Sun,Weiyi Yang,Shuang Gao,Caixia Sun,Qi Li
Ag is the most effective metal disinfectant against pathogenic microorganisms and thus, various approaches have been exploited to enhance the dispersity and control the release of Ag+ ions from Ag nanoparticles. In this study, a superparamagnetic Fe3O4@SiO2@Ag@porous SiO2 disinfectant with a double-layer core–shell structure was developed. Its superparamagnetic Fe3O4 nanosphere core ensured its good dispersity in water and allowed its easy magnetic separation after treatment. Its dense SiO2 inner shell protected the Fe3O4 nanosphere core and allowed a good loading of Ag nanoparticles. Its mesoporous SiO2 outer layer effectively protected the Ag nanoparticles from detachment, and its mesoporous channels resulted in lower silver oxidation and dissolution for the controlled release of Ag+ ions. Thus, a highly efficient, silver-based disinfectant was developed, as demonstrated by its effective disinfection of Escherichia coli bacteria with good recycle performance, while the silver concentration in the treated water met the MCL of silver for drinking water.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 36
·2260
·
IF 2.8
Dong Hongyu,Liang Zhenhui,Xu Qinchao,Zhao Liangfu
A binary micro-nano graded silver-based low temperature conductive composite paste was developed for printing conductive patterns on flexible substrates.The conductive phase includesmulti-scale flake and spherical silver powders, with bisphenol F epoxy resin as the binder. Butyl butyrate, 2-(2-butoxyethoxy) ethanol, and diethylene glycol monobutyl ether acetate were selected as organic solvents. Using DSC, TG, surface morphology, viscosity, and resistivity analyses, we investigated the effects of these solvents with different boiling points on the conductivity and curing behavior of the low temperature paste. After screen-printed onto polyimide film, the paste demonstrated low resistivity (3×10 –5 Ωˑcm) and robust mechanical stability.Its resistance increased from 1.4 Ω to only 1.5 Ω after 3000 bending cycles. The adhesion strength of the printed pattern was assessed via a tape test.The pasteshowedgood comprehensive performance, when applied in thin-film switches and light-emitting logo devices. These results highlight its potential for flexible electronicsapplications and provide valuable insights for advancing flexible conductive circuits.
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Applied Materials Today
·
2025
·
IF 6.9
Longfang Ren,Fangfang Dong,Xiaodong Gao,Sijie Yu,Taotao Qiang
The flexible ammonia sensor can detect the ammonia content in the air or the exhaled gas of humans, but the commonly used sensors have poor breathability and washability, so they are not suitable for direct contact with human skin. In this work, based on the excellent flexibility and permeability of nonwovens, UiO-66-NH 2 /MoS 2 @nonwoven (UMN) and UiO-66-NH 2 /MoS 2 /Ag@nonwoven (UMAN) gas sensors were prepared by loading self-prepared UiO-66-NH 2 /MoS 2 (UM) and UiO-66-NH 2 /MoS 2 /Ag (UMA) onto microfiber nonwovens. The results show that UMN and UMAN gas sensors exhibit high selectivity toward ammonia gas. The response values of UMN and UMAN demonstrate a consistent linear trend within the ammonia concentration range of 1–50 ppm and reach 43 % and 47 % at 1 ppm respectively. The response variations of the sensors before and after bending are below 4 %, demonstrating excellent bending stability. After washing for 24 h, the gas sensing performance shows nearly no change, indicating that they both have good reusability and washability. However, the sensors exhibit limited thermal and humidity stability. Given the challenges such as poor breathability and insufficient biocompatibility faced by traditional flexible gas sensors, UMN and UMAN sensors have emerged as highly promising alternatives with distinct advantages.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Jinqiu Xu,Haoyu Chen,Jing Liu,Jianru Tang,Xiaohua Zhu,Sheng Yang,Shu Huang,Youyu Zhang,Meiling Liu
The development of analytical methods capable of simultaneously detecting multiple components in biological samples holds significant potential for advancing disease diagnosis. However, constructing optical platforms for continuous detection remains challenging due to limitations such as insufficient selectivity, specificity, response speed, and sensitivity. Herein, we developed a facile and efficient microwave-assisted method to rapidly synthesize CuS quantum dots (QDs) and constructed a fluorescence-based sensing platform for detecting Ag + and glutathione (GSH). The fluorescence emission of CuS QDs at 500 nm was selectively quenched upon interaction with Ag + , exhibiting a linear correlation with Ag + concentrations ranging from 0.3 to 300 μM. Notably, the quenched fluorescence could be restored by introducing GSH, accompanied by a slight redshift in the emission wavelength. This Ag + -mediated “off-on” fluorescence sensing mechanism significantly enhanced the sensitivity for GSH detection. This platform demonstrated high selectivity towards both Ag + and GSH, enabling their quantitative determination in complex matrices, including tap water, human serum, and cell lysate. This work not only presents a novel synthetic approach for CuS QDs but also achieves successive detection of Ag + and GSH without requiring complex probe modifications or the integration of multiple nanomaterials, representing a simplified yet highly effective design compared to more intricate systems. The proposed platform serves as a versatile measurement tool applicable across various fields, from environmental contaminant monitoring to the detection of key biological thiols, demonstrating a generalizable strategy for diverse analytical scenarios in both environmental and clinical contexts.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Kelin Hu,Tao Li,Xinyuan Li,Jing Zhang,Yu He
Acetylene is of great significance for early warning gas of thermal runaway in lithium-ion batteries (LIBs). In this work, we designed a structure of nanoparticle decorated In 2 O 3 /CeO 2 nanofibers and prepared them by electrospinning. Then we regulated the sensing properties by doping Ag, and acquired an optimal sensor for detecting C 2 H 2 gas. Morphology and structure have been characterized. The gas sensor exhibited good response for acetylene. In a low temperature of 160 °C, the response (R a /R g ) exceeded 9.7 in C 2 H 2 gas with a concentration of 100 ppm. Rapid response in 45 s, and outstanding long-term stability have also been proved. The key point was that the sensor can all achieve a response over 2 within the temperature range of 20 °C to 220 °C. This temperature range coincides with the internal temperature variation range of LIB cells including the normal condition and early stage of thermal runaway. Meanwhile, the reproducibility of electrospinning method has already been verified. Furthermore, we fabricated the LIBs implantable sensor and tested its built-in stability, then we found that the sensor had a highly differentiated response signal to distinguish C 2 H 2 gas and temperature. Finally, according to the nanostructure of sensing materials, acetylene sensing mechanism has been proposed.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Lihong Zhang,Yuhang Qi,Jinghui Lai,Xilian Hu,Bibo Yu,Ziyang Li,Shengli Wang,Chong Luo
An ultra-smooth silicon carbide (SiC) wafer surface is critical for the performance and longevity of semiconductor, optoelectronic, and high-temperature devices. In this study, a novel photocatalytic chemical mechanical polishing (CMP) strategy is proposed using Ag-loaded CeO 2 abrasives, in which Ag establishes strong electronic metal–support interactions (EMSI) with CeO 2 . This system achieves an ultra-low surface roughness of 0.086 nm while maintaining a high material removal rate of 445.5 nm/h. Under UV illumination, Ag nanoparticles function as electron sinks, suppressing electron–hole recombination and promoting the generation of reactive oxygen species (•OH and •O 2 − ), which rapidly oxidize the SiC surface into a softer SiO 2 layer. Concurrently, oxygen vacancies in CeO 2 act as critical active sites for Ce–O–Si bond formation, facilitating mechanical removal. The incorporation of Ag also effectively stabilizes oxygen vacancies by suppressing their passivation in strongly oxidizing slurries, thereby preserving their reactivity and enhancing the mechanical removal efficiency. This CeO 2 -based metal–support architecture furnishes advanced mechanistic insights and strategic design principles for CMP processes predicated on oxidation-facilitated removal pathways.
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PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Yuan Jing,Fandi Meng,Fuhui Wang,Li Liu
Slippery liquid-infused porous surface (SLIPS) has garnered significant attention in marine anticorrosion and antifouling applications due to their slippery attributes. Nevertheless, it remains challenging to fulfill the protection requirements by relying exclusively on the barrier and anti-adhesion mechanisms of surface lubricating layer. In this work, a dual-functional slippery organogel coating was meticulously synthesized by introducing Ag(Ӏ)-imine coordination bonds into organosilicon networks, thereby endowing the coating with self-healing and antibacterial properties. A surface scratch with a width of 50 μm can be effectively repaired within 6 h at 60 °C, and the repair efficiency exceeds 85 %. In addition, the coating exhibits a dual antibacterial mechanism, which functions through both sterilization via the release of Ag + and antiadhesion due to its slippery properties. Following a 7-day cocultivation period with PAO1 bacteria, the coating retained 100 % bactericidal activity and 99.8 % resistance to bacterial adhesion. Moreover, the antialgal efficacy of the AP-TA 0.2 -Ag 1 @Oil coating against Chlorella and P. tricornutum increased by 99.9 % and 99.7 %, respectively. Furthermore, the combination of Ag(Ӏ)-imine coordination bonds and silicone oil effectively preserves the corrosion resistance of the coating. The EIS results demonstrated that the | Z | 0.01 Hz value of the slippery organogel coating was maintained at 1.07 × 10 7 Ω·cm 2 after immersion in 3.5 wt% NaCl solution for 14 days, suggesting excellent anticorrosion performance of the coating. This study provides a novel perspective for the development of marine protective coatings that possess antifouling, self-healing, and anticorrosive properties.
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APPLIED CATALYSIS A-GENERAL
·
2021
·
IF 5.706
Qingting Zhang,Andreas Goldbach,Na Ta,Wenjie Shen
Hexagonal molybdates ( h-MoO 3 ) include abundant Mo vacancies that are charge-compensated by cations residing within one-dimensional channels. Hence, they present an intriguing structural motif for Mo catalysis which has been hardly explored for selective oxidation of olefins. We discovered that NH 4 + and Ag + -exchanged h-MoO 3 display surprisingly varied behavior during propylene oxidation. Acrolein and acrylonitrile are the main partial oxidation products with the latter forming due to NH 4 + consumption. The catalytic activity more than doubles upon introduction of Ag + which also enhances selectivity for the main products up to ∼60 %. Unexpectedly, the hexagonal frameworks transform into orthorhombic α-MoO 3 40−60 °C below their reported stability limits already. In addition, Ag 2 Mo 4 O 13 and Ag nanoparticles segregate in case of Ag + -containing h-MoO 3 frameworks. The resulting Ag/Ag 2 Mo 4 O 13 /α-MoO 3 composites catalyze propylene conversion into acrolein with even higher selectivity (∼80 %). Detailed analyses indicate that Ag 2 Mo 4 O 13 drives formation of this oxygenate over these composites.
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POLYMER ENGINEERING AND SCIENCE
·
2021
·Vol. 62
·期 2
·576-585
·
IF 2.428
Yang Liu,Tingting Liu,Xiangchi Liu,Baijun Liu,MingYao Zhang
In this research, monodispersed polystyrene (PS) microspheres were prepared by dispersion polymerization. PS microspheres decorated with silver nanoparticles (PS/Ag composite microspheres) were synthesized by a modified chemical plating method with water as the synthesis medium. The microspheres at each stage were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), UV–visible spectroscopy (UV–vis), field-emission scanning electron microscopy (FESEM), and energy-dispersive spectrometer (EDS). The reduction of methylene blue (MB) was carried out with PS/Ag composite microspheres as a catalyst and NaBH 4 as a reducing agent. The results showed that the MB dye was reduced to colorless within 180 s. The reduction of the MB dye followed pseudo-first-order kinetics with an apparent rate constant (K app ) value of 0.01425 s −1 . Control experiments were also carried out by adding microspheres from each chemical plating pretreatment stage to the MB, without PS/Ag composite microspheres. The catalytic activity of the PS/Ag composite microspheres was high after five consecutive cycles of recovery, showing promising reusability. The catalytic activity of the prepared PS/Ag catalysts was superior to other catalysts for the reduction of MB.
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