Coatings
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2024
·Vol. 14
·期 12
·1524
·
IF 2.9
Jiayuan Yang,Jixing Cui,Haiping Zhang,Hui Zhang,Jesse Zhu
Antibacterial powder coatings have attracted increasing attention with the awakening of people’s health awareness. Silver antibacterial agent has been widely used in coating system due to its superior stability and durability. However, silver ions have the problems of excessive release rate and the tendency to cause yellowing of the coating film. The addition of Cu2+and Zn2+can effectively alleviate these two phenomena. In this paper, the ternary exchange kinetics of Ag+, Cu2+, and Zn2+were studied to provide a theoretical basis for the synthesis of LTA-Ag-Cu-Zn. The reaction kinetics study shows that the selectivity and the adsorption capacity of LTA to Ag+is higher than that of Cu2+and Zn2+. The thermodynamic analysis discovers that LTA has the highest selectivity for Ag+, and the exchange between the two is spontaneous. In contrast, the selectivity of LTA to Cu2+and Zn2+is concentration-dependent. By establishing the three-ion competitive adsorption curve, it is found that the selectivity of Ag+is the highest, and the selectivity of copper and zinc is similar. These trends result from Ag+ions’ low hydration energy, small hydration radius, and strong electronegativity. This research lays the groundwork for developing high-performance LTA-Ag-Cu-Zn tri-ion exchange antibacterial agents.
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ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Zhili Chen,Li Huang,Xingmeng Zhou,Yunxiang Zhang,Xin Chen,Chenliang Zhou,Hazem Abdelsalam,Wei Chen,Zhongjie Wang,Qinfang Zhang
Metal cluster co-catalysts have been widely considered as an effective strategy to address the energy crisis and environmental problems owning to the efficient light absorption and the enhanced separation of electron hole pairs. In this contribution, via a facile in-situ photoreduction technique, the Ag/(BiO) 2 CO 3 composites were synthesized to degrade the antibiotic pollutant tetracycline (TC). The incorporation of silver (Ag) clusters on (BiO) 2 CO 3 surface can form the built-in electric field (IEF) at the Mott-Schottky junction interface and facilitate the migration of photo-generated electrons from (BiO) 2 CO 3 to Ag clusters. Simultaneously, the synergy of local surface plasmon resonance (LSPR) effect also strengthens the light absorption capacity, and finally improving photocatalytic activities of composite materials. The optimal Ag/(BiO) 2 CO 3 composites exhibit excellent TC degradation, which is approximately 6.7 times than that of the pure (BiO) 2 CO 3 . Eventually, the potential degradation pathway of TC is proposed and the toxicity of the intermediates is also evaluated. This work motivates the design of highly efficient metal cluster co-catalysts and widens their potential applications in the environmental remediation.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Chaochen Chen,Fang Lei,Ying Shi,Jianjun Xie,Lei Zhang,Lingcong Fan
The surface metallization of Si 3 N 4 ceramics with the Ag–Cu conductive paste containing CuO was systematically investigated. The interfacial reactions between CuO and Si 3 N 4 promoted the surface metallization of the ceramic substrate in an argon atmosphere. The effects of Ag and Cu relative contents on the evolution of the thick film surface morphology were studied. The electrical properties and tensile strength of composite ceramic substrates were enhanced through the generation of Ag–Cu eutectic solution within the thick film layer. The effect of brazing time on the properties of Ag–Cu/Si 3 N 4 composite ceramic substrates was investigated. Mechanical testing and scanning electron microscopy (SEM) were used to analyze the interface tensile strength of the Ag–Cu/Si 3 N 4 composite substrates and the morphology of the Ag–Cu film, and the bonding mechanism of the composite ceramic substrate was studied. When the sample was brazed at 800 °C for 20 min, the maximum tensile strength of 23.6 MPa between the Ag–Cu film and ceramic substrate was obtained, the lowest resistivity of 6.22 μΩ•cm was obtained. The bonding interface between thick film layer and the ceramic substrate formed the Ag–Cu mechanical structure was benefit for improving the comprehensive performance of the Cu/Si 3 N 4 composite ceramic substrate.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Haifeng Zhu,Renjie Ding,Jiashun Zhou,Zhiyuan Lang,Huihua Luo,Kehui Xue,Yaping Zhang,Lianqing Yu
This work proposes a novel strategy which the microwave plasma chemical vapor deposition (MPCVD) technology was used as one important preparation process for synthesizing TiO 2 @Ag@graphene ternary junction. The ternary junction exhibits an enhanced photocatalytic hydrogen production rate of 4.44 mmol·g −1 ·h −1 , which is approximately 9.25 times higher than that of pure TiO 2 (0.48 mmol·g −1 ·h −1 ). The remarkable photocatalytic activity can be attributed to the strong synergistic effect between TiO 2 @Ag and graphene. The loaded Ag and graphene can not only act as electronic conductors to effectively promote the separation of charges, but also obviously improve the response of visible light of TiO 2 . The photogenerated electrons are transferred from TiO 2 to graphene via the Ag medium was further verified by DFT calculations. Constructing an Ag-graphene interface can activate carbon atoms, which can quickly capture electron to fill the π* orbital of graphene. TiO 2 @Ag@graphene ternary junction exhibits a lower ΔG H* value of 0.51 eV than that of TiO 2 @Ag (1.49 eV), which indicates that TiO 2 @Ag@graphene ternary junction with optimal absorption energy for the hydrogen intermediate.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Xiaoxia Kang,Jige Yuan,Xijuan Gu,Xiaoyan Li,Tao Wen,Miao He,Yue He,Xiaoxiao Yang,Yuechen Li,Conglin Guo,Haiwei Ji,Yuling Qin,Li Wu
The agriculture and environmental industries have employed organophosphorus pesticides (OPs) chemicals as insecticides extensively in previous decades, leading to persistent life-threatening issues. Therefore, developing a platform for the efficient identification of OPs is significant for environmental protection and human health. In this study, a strategy for the colorimetric and fluorescence detection of OPs by combining quantum dots (QDs) with DNA-templated silver nanoclusters (DNA-AgNCs) was proposed. Technically, the fluorescence of DNA-AgNCs will be enhanced once guanine (G)-rich sequences get close to the DNA-AgNCs to form hybrid complexes DNA-AgNCs/G, while quenching of fluorescence can be attributed to the hydrolysate (thiocholine) of acetylthiocholine (ATch) that was caused by acetylcholinesterase (AchE). Based on the fact that OPs can irreversibly inhibit the catalytic activity of AchE and slow down the fluorescence quenching of DNA-AgNCs/G, thus, OPs detection can be achieved by evaluating the fluorescence intensity of DNA-AgNCs/G. Additionally, a dual-mode detection system (colorimetric and fluorescent) is achieved through an ion-exchange reaction between QDs and DNA-AgNCs/G. The concentration of OPs is quantified by monitoring fluorescence changes in the QDs and poly(9,9-dioctylfluorene) (PFO) polymer dots (Pdots) system, with PFO Pdots serving as a stable internal reference. Using trichlorfon as a model, the limit of detection (LOD) was 2.55 pg/mL, while an excellent linear relationship with the trichlorfon concentrations in the range of 5 × 100–5 × 105 pg/mL was obtained. Additionally, visual detection (as low as 1.06 pg/mL) can be realized readily, taking advantage of the ion-exchange reaction between DNA-AgNCs and QDs.
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CELLULOSE
·
2024
·
IF 4.9
Xiang Shuangfei,Cai Dongrong,Ru Hongfu,Ma Yuchen,Xiao Yuanxiang,Zhao Shujun,Fu Feiya,Liu Xiangdong
The rational design of Ag NP decorated cotton fabrics with durable Joule heating performance has attracted great interest. However, the combination of Ag NPs and cotton fabrics is so weak that it hinders its long-term stability in service. Here, an in situ dual-anchoring strategy is employed to enhance the immobilization of Ag NPs by L-Cysteine and DNA on cotton fabrics. Specifically, DNA plays a role as template for immobilizing Ag NPs, while L-Cysteine acts as a binder between cotton fabrics and DNA. Under the synergistic effect of L-Cysteine and DNA, Ag NPs are firmly anchored on cotton fabrics. The obtained cotton fabric based wearable Joule heaters exhibit low electrical resistance (24 Ω/sq) and long-term stability. Furthermore, the cotton fabric based wearable Joule heaters can be heated up to 60.3℃ at a low driving voltage of 4.5 V, and maintain superior Joule heating performance even after 1000 times of bending fatigue tests. Thus, this work holds great promise for a durable wearable Joule heater. Graphical abstract
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Journal of Water Process Engineering
·
2025
·
IF 6.7
Yu Yao,Chengqi Lu,Qianhong Shen,Yijin Yang,Kaiyue Huang,Libei Jiang,Jie Liu,Yue Li,Xudan Cao,Hui Yang
A novel ternary composite photocatalyst of nitrogen-doped carbon quantum dots (NCQDs)/tetrapods silver phosphate (Ag 3 PO 4 )/silver (Ag) nanoparticles was designed and fabricated. Kelvin probe force microscopy and in-situ irradiated X-ray photoelectron spectrum demonstrated the cooperative action between the S-scheme heterojunction and Schottky junction within this ternary composite system, which facilitate efficient dual-channel charge transfer and achieve high oxidation potential. Moreover, the incorporating of persulfate into the photocatalytic reaction system enhanced the capture of photogenerated electrons, while the generated SO 4 -· radicals further improved photocatalytic reaction efficiency. Consequently, the NCQDs/Ag 3 PO 4 /Ag photocatalyst exhibited remarkable photocatalytic performance for the removal of ciprofloxacin (CIP). The mineralization rate of CIP over NCQDs/Ag 3 PO 4 /Ag photocatalyst activated by persulfate was about 6.7 times greater compared to the bare Ag 3 PO 4 photocatalyst. Additionally, four potential pathways for the photocatalytic degradation of CIP were proposed utilizing the LC-MS analysis. Furthermore, this ternary composite photocatalyst not only demonstrated high cyclic stability but also exhibited robust photocatalytic activity in systems containing coexisting anions, cations or various natural water sources, thereby exhibiting its application potential for antibiotic degradation in real environmental settings.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Yanting Dou,Bobo Bai,Jiqi Zheng,Xiufang Wang,Yu Gao,Yi Li,Qiuhui Bu,Fu Ding,Yaguang Sun,Zhenhe Xu
The effective combination of two metallic sulfides to form a heterojunction and regulate semiconductor structure can significantly improve the response of photocatalysts under visible light. In this study, we have successfully grown Ag-doped ZnIn2S4 nanosheets randomly on carefully designed hollow Co9S8 polyhedral nanocages to construct the Co9S8/Ag:ZnIn2S4 heterojunction. The optimized 1.0 wt % Co9S8/Ag:ZnIn2S4 heterostructure shows excellent activity with the H2 generation rate of 1947.7 μmol g–1 h–1, which is 1.58 times greater than the Ag:ZnIn2S4 (1232.0 μmol g–1 h–1). However, pure Co9S8 has a narrow band gap but almost no response in visible light due to the fast photogenerated carrier recombination rate. The degradation trend of methyl orange (MO) in all as-prepared samples is the same as that of hydrogen production. The compound with the Co9S8 mass fraction of 1.0 wt % has the fastest degradation rate and can completely degrade MO within 16 min. In addition, the Co9S8/Ag:ZnIn2S4 heterostructure has also shown long-term stability after 20 photocatalytic hydrogen evolution and MO degradation cycle experiments, respectively. This work highlights the significance of improving the photocatalytic performance by modulating the morphology of metallic semiconductors and constructing heterostructures.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Senlin Peng,Jiayi Song,Shouting Wu,Qian Wang,Lingyi Shen,Dongmei Li,Jian Peng,Qilong Zhang,Xianjiong Yang,Hong Xu,Carl Redshaw,Ying Li
Multidrug-resistant (MDR) bacteria pose serious threats to public health due to the lack of effective and biocompatible drugs to kill MDR bacteria. Photodynamic antibacterial therapy has been widely studied due to its low induction of resistance. However, photosensitizers that can efficiently generate reactive oxygen species (ROS) through both type I and type II mechanisms and that have the capability of multiple modes of action are rarely reported. Addressing this issue, we developed a near-infrared-emitting triphenylamine indole iodoethane (TTII) and its silver(I) self-assembled (TTIIS) aggregation-induced emission (AIE) photosensitizer for multimode bacterial infection therapy. TTII can efficiently produce both Type I ROS •OH and Type II ROS 1O2. Interestingly, the Ag(I)−π interaction contributed in TTIIS efficiency promotion of the generation of 1O2. Moreover, by releasing Ag+, TTIIS enabled photodynamic-Ag(I) dual-mode sterilization. As a result, TTIIS achieved an effective enhancement of antibacterial activity, with a 1–2-fold boost against multidrug-resistant Escherichia coli (MDR E. coli). Both TTII and TTIIS at a concentration as low as 0.55 μg mL–1 can kill more than 98% of methicillin resistant Staphylococcus aureus (MRSA) on MRSA-infected full-thickness defect wounds of a mouse, and both TTII and TTIIS were effective in eliminating the bacteria and promoting wound healing.
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Journal of Energy Storage
·
2024
·
IF 8.9
Qirui Wang,Hongen Nian,Xiaoling Tan,Xiang Wang,Yong Deng,Xiaobin Gu,Ayoub Gounni,Yujing Zhao,Zhaoying Wang,Yongquan Zhou
Filling thermally conductive materials (TCMs) is an effectivity way to enhance the thermal conduction of phase change materials (PCMs). However, it always has negative effects on heat storage behavior of PCMs. Balance of latent heat and thermal conduction capacity plays a vital role in practical application of thermal storage management. To study the effect of dimensional features of TCM on thermal characteristic of PCM, Ag nanomaterials (Ag NMs) which including 0-dimensional Ag nanoparticles (AgNP), 1-dimensional Ag nanowires (AgNW) and 2-dimensional Ag nanosheets (AgNS) acted as TCM, were used to modify the flaky expended vermiculate (EVM-Ag NMs), a series of CH 3 COONa·3H 2 O (SAT)/EVM-Ag NM composite PCMs (SAT/EVM-Ag NM CPCMs) were prepared. It was found that the Ag NMs contributed to the phase change behavior of hydrated salts. Wherein, the SAT/EVM-AgNW CPCM possessed high latent heat (∼200.9 J/g) and great thermal reliability (heat enthalpy loss was 6.9 % after 500 thermal cycles). Besides, Ag NMs also improved the thermal conductivity of the CPCMs. The Ag NWs formed interconnected thermal highways which was benefited to enhance thermal conductivity (0.8153 W·K −1 ·m −1 ). This work provides a new strategy for simultaneously improving the thermal conductivity and heat storage behavior of PCM, finds a new perspective to explore the mechanism of TCMs on phase change behavior and heat conduction of PCM.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Zheng Tang,Chenxi Li,Chenyu Yan,Qian Zhang,Zhe Piao,Honggui Wang,Ya Zhang
Electrocatalytic carbon dioxide reduction reaction (eCO 2 RR) is one of the attractive approaches to CO 2 utilization. Nevertheless, it remains a challenge to prepare highly efficient and selective electrocatalysts to realize deep conversion of multi-carbon products. The absence of active sites due to the reconfiguration of copper-based catalysts leads to migration deactivation during catalysis, rendering low catalytic efficiency. In this work, Cu 2 Se nanowires (NWs) were obtained from the Cu foam. After further electroreduction for 90 s, Ag nanoparticles (NPs) were modified on the flower rod-shaped Cu 2 Se NWs (Ag 2.69% /Cu 2 Se NWs). This interfacial modification strategy, balanced the Cu δ+ active valence state on the surface of the Ag 2.69% /Cu 2 Se NWs, led to a high Faradaic efficiency (FE) of ethanol (∼70 %) at −0.52 V (vs. reversible hydrogen electrode (RHE)). Besides, the Ag 2.69% /Cu 2 Se NWs achieved a high partial current (∼13.9 mA) for ethanol, 18.5 μmol/h ethanol yield and an energy efficiency of 47.1 % in the H-type electrolytic cell. The reaction mechanism was investigated at the molecular level through density functional theory (DFT) calculation. The interface-modified Ag NPs provided stable *COOH intermediates during the reaction process, effectively achieving surface *CO enrichment. Besides, the presence of Ag NPs resulted in the generation of abundant Cu δ+ active species. The *CO migrated to the Cu δ+ active sites to accelerate the asymmetric coupling of *CO and *CHO, which significantly improved the FE of CO 2 electroreduction to ethanol. Our work offers a promising approach for designing Cu 2 Se-based nanowires electrocatalysts for CO 2 reduction with excellent activity and selectivity.
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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.
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