LANGMUIR
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2024
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IF 3.7
Tao Xue,Hui Li,Yuying Wang,Han Miao,Xinxin Li
Synthesizing catalyst supports with appropriate compositions and structures is crucial for reducing the sizes of metal nanoparticles and enhancing their catalytic activities. In this work, a series of monolithic hyper-cross-linked supports (HCP-CC) with hierarchical pores were synthesized. The monolithic structure facilitated easy operation in catalytic reactions, while the composition and structure of HCP-CC could be tailored simultaneously by utilizing the functional cross-linking agent cyanogen chloride. Furthermore, in situ loading of nano-Ag into HCP-CC resulted in the hybrid catalyst HCP-CC-Ag. The synergy of confinement and coordination effect controlled and limited the size of nano-Ag to approximately 3 nm, classifying them as ultrasmall nanoparticles, which ensured outstanding catalytic activity. This hybrid catalyst could improve the reaction rate constant to 0.423 min–1; it efficiently promoted the degradation of organic dye and exhibited great universality and recyclability, making it a potential heterogeneous catalyst for dye wastewater treatment.
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PubMed
高影响因子
Journal of Water Process Engineering
·
2025
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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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JOURNAL OF MOLECULAR LIQUIDS
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2024
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IF 5.3
Huan Cheng,Kuang Luo,Xiaojun Wen,Lijun You,Ning Cai,Jumei Li
In this work, we proposed a straightforward self-assembly and in-situ deposition protocol to construct Cu 2 O/g-C 3 N 4 /Ag composites, which demonstrated peroxidase-like attribute and exceptional SERS activity. These composites proved to be an effective SERS analysis tool for detecting organic fungicides like malachite green (MG) and crystal violet (CV). Remarkably, they achieved detection limits as low as 10 −9 M in DI water as well as fish pond water, and exhibited a strong linear correlation between logarithmic concentrations and SERS intensities (R 2 ≥ 0.97). Beyond that, with the aid of hydrogen peroxide (H 2 O 2 ), the peroxidase-like Cu 2 O/g-C 3 N 4 /Ag composites rapidly degraded MG and CV molecules within just 5 min. Furthermore, their practical reusability based on the peroxidase-like reaction was proved by high SERS performance across 5 detection cycles. These results emphasize the immense potential of Cu 2 O/g-C 3 N 4 /Ag in SERS-based trace fungicide detection and suggest future applications in ecological restoration through peroxidase-like reactions.
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高影响因子
MICROCHEMICAL JOURNAL
·
2024
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IF 4.9
Yang Feng,Mengyi Yuan,Lan Zhang,Tingting Zhang,Shiying Wu,Lujie Li,Lingling Wang,Weihua Li,Rui Lu
This study reports the development of an electrostatic self-assembly surface-enhanced Raman scattering (SERS) substrate based on zeolitic imidazolate framework-8 (ZIF-8) decorated with silver nanoparticles (AgNPs). A seed-mediated growth method was employed to synthesize AgNPs with an average diameter of 30 nm, and a mild synthesis process was used to prepare ZIF-8 nanoparticles with an average diameter of 350 nm. The ZIF-8/Ag nanocomposites have been optimized and characterized using a variety of techniques. As a probe molecule, 4-aminothiophenol was used to evaluate the SERS performance of the ZIF-8/Ag nanocomposites, demonstrating low limit of detection to 8.32 × 10 −8 M, respectively. ZIF-8/Ag nanocomposites also demonstrated good signal reproducibility with a relative standard deviation of 12.5 % for 10 −6 M 4-aminothiophenol. Furthermore, the ZIF-8/Ag nanocomposites have successfully been used to detect 4-mercaptopyridine and the pesticide thiram in laboratory tap water with recoveries ranging from 87 % to 113 %. The ZIF-8/Ag nanocomposites were further investigated for their potential use as SERS substrates for the detection of thiram residues on the surface of apples. A finite difference time-domain simulation was also conducted to investigate the SERS enhancement mechanism of the ZIF-8/Ag nanocomposites.
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高影响因子
Journal of Materials Chemistry A
·
2025
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IF 9.5
Ru Jia,Xiaoxue Zhang,Li Gan,Muhammad Tahir,Zhen-Feng Huang,Lun Pan,Ruijie Gao,Chengxiang Shi,Xiangwen Zhang,Guidong Yang,Ji-Jun Zou
The nitrate reduction reaction (NO3RR) represents a promising route for water treatment and NH3 generation. This process involves the deoxygenation of NO3− to form nitrite (NO2−), followed by its subsequent hydrogenation. However, discrepancies in the rates of these two steps result in a decrease in faradaic efficiency (FE) and NH3 yield rate. Herein, we demonstrated a tandem catalyst of (Cu7/Ag3)7-Ru3/C achieving a high NH3 yield rate of 3.45 mmol h−1 cm−2 (2.30 mol gcat−1 h−1) and a FE of 93.48% at −0.9 V vs. the reversible hydrogen electrode. The Cu/Ag heterostructure greatly enhanced the conversion of NO3− to NO2− over a wide potential window due to the synergistic effect, while Ru, selectively adsorbing NO2−, provided active hydrogen derived from water hydrolysis to facilitate NH3 synthesis. Furthermore, (Cu7/Ag3)7-Ru3/C exhibited stable performance in a membrane electrode assembly over 60 hours, achieving an average NH3 yield rate of 6.90 mmol h−1. The ammonium chloride solid product was successfully obtained using an air stripping methodology. In situ characterization revealed that the surface microenvironment of Ru influenced the adsorption configuration of *NO and on-top adsorbed NO was more favorable for ammonia synthesis compared to bridge-adsorbed NO. The overall reaction pathway involved stepwise deoxygenation to form *N and subsequent gradual hydrogenation.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Haoyu Cai,Guojun Weng,Jianjun Li,Gaofeng Wu,Jian Zhu,Junwu Zhao
Surface deposition of metal on plasmonic nanoparticles is a powerful technique to enhance their Raman activity. In this paper, we demonstrated a sensitive surface-enhanced Raman scattering (SERS) substrate based on asymmetric deposition of Ag on gold nanobipyramids (Au NBP@BDT@Ag), which was applied to detect the drug residues of malachite green (MG), methylene blue (MB), and crystal violet (CV) in aquaculture water. By tuning the concentrations of 1,4-benzenedithiol (BDT) and AgNO 3 , the deposited Ag component showed an asymmetric growth on the two ends of Au NBPs, forming Au@Ag nanodarts. The Au@Ag nanodarts exhibited the most outstanding SERS performance and was thus used to detect the drug residues. Comparing with the original Au NBP, the SERS enhancement of Au@Ag nanodart has been dramatically improved with the maximum enhancement factor (EF) of 8 × 10 6 . The limit of detection (LOD) of the three drugs are respectively 8.4 × 10 −11 M for MG, 8.5 × 10 −9 M for MB, and 6.7 × 10 −9 M for CV, while the broad linear detection range is 1.0 × 10 −10 M ∼ 1.0 × 10 −6 M for MG, 1.0 × 10 −8 M ∼ 1.0 × 10 −5 M for MB, and 1.0 × 10 −8 M ∼ 1.0 × 10 −5 M for CV, respectively. And the detection of real clam feeding water samples also showed the potential of this detection strategy. We believed the detection strategy could have an application in the field of the detection of drug residues in aquaculture water and the asymmetric deposition will be meaningful in the field of dimer synthesis using Au NBP as core.
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高影响因子
SmartMat
·
2024
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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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Nano Materials Science
·
2024
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IF 12.6
Wenting Tao,Wenqin Shao,Meng Ma,Si Chen,Yanqin Shi,Huiwen He,Yulu Zhu,Xu Wang
The increasingly serious electromagnetic (EM) radiation and related pollution effects have gradually attracted people's attention in the information age. Hence, it's crucial to develop adaptive shielding materials with minimum EM waves (EMW) reflection. In this paper, Ag nanoparticles loaded mesoporous carbon hollow spheres (MCHS@Ag) were synthesized by chemical reduction method, and cellulose nanofibers (CNF)/MXene/MCHS@Ag homogeneous composites were prepared. The total EM interference shielding efficiency (SE T ) of CNF/MXene/MCHS@Ag composite film was 32.83 dB (at 12.4 GHz), and the absorption effectiveness (SE A ) was improved to 26.6 dB, which was 63.1% and 195.5% higher than that of CNF/MXene/MCHS composite film. The low dielectric property of MCHS effectively optimized the impedance matching between the composites and air. The hollow porous structure prolonged the transmission path of EMW and increased the absorption loss of the composites. At the same time, Ag nanoparticles located the MCHS were helpful to construct the internal conductive path overcoming the damage of the conductive property caused by the low dielectric of MCHS. This research adopts a straightforward method to construct a lightweight, pliable, and mesoporous composites for EMI shielding, which serves a crucial role in the current era of severe EM pollution.
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Journal of Energy Storage
·
2024
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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
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2024
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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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高影响因子
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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危险品化学品经营许可证（带存储）