INORGANIC CHEMISTRY COMMUNICATIONS
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2024
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IF 4.4
Yumin Liang,Chenhui Liu,Zhiyu Ma,Jiyun Gao,Yanxin Wu
HKSUT-1 is often used as an adsorbent because of its excellent adsorption properties. In this study, Ag + was impregnated into the HKSUT-1 precursor solution using the impregnation method, with sodium borohydride (NaBH 4 ) serving as the reducing agent. This was done to examine the removal efficiency of NR dye. The Ag-HKSUT-1 composites were prepared by varying the additions of AgNO 3 and NaBH 4 . The morphology and structure of the Ag-HKSUT-1 composites were characterized by TG, FT-IR, BET and TEM. The adsorption performance of AH1 for neutral red dye in wastewater was investigated. The adsorption process was described by the Langmuir model and the pseudo-second-order kinetic model. The adsorption capacity of AH1 for NR dye at 298 K was calculated to be 64.59 mg/g, indicating that Ag-HKUST-1 effectively adsorbed NR dye. The adsorption process is driven by a chemisorption mechanism, where intermolecular forces between Ag-HKUST-1 and NR, electrostatic interactions, and π-π conjugation between benzene rings play key roles. The results enhance our understanding of the surface interactions between Ag-HKUST-1 and NR dyes and broaden the application of HKUST-1 as an adsorbent for pollutant removal in water.
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Coatings
·
2024
·Vol. 14
·期 2
·192
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IF 2.9
Danye Zuo,Yuhong Yin,Liming Jiang,Zhi Xia,Chong Tan,Junsheng Li,Jinlong Zuo,Yuyang Wang
This study focuses on synthesizing a composite material of Ag/ZnO/BiOCl using Ag, ZnO, and BiOCl as raw materials. The material was prepared by loading Ag and BiOCl onto ZnO nanofilms, aiming to enhance the photocatalytic degradation of ciprofloxacin (CIP). Optimization of the photocatalytic degradation process through single-factor experiments revealed that under conditions of an initial CIP pH of 9, an Ag/ZnO/BiOCl dosage of 1 g/L, and an initial CIP concentration of 5 mg/L the conversion efficiency of CIP reached 98.79% after 150 min of exposure to a 250 W xenon lamp simulating sunlight. Furthermore, the composite material maintained a conversion efficiency of 86.17% for CIP even after five cycles of reuse, demonstrating its excellent stability. The optical properties, elemental composition, valence state, crystallinity, and morphology of the samples were analyzed using techniques such as X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL), UV–visible diffuse reflectance spectroscopy (UV-vis DRS), Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The results indicate that the introduction of Ag expanded the light response range of ZnO, while the addition of BiOCl improved the separation efficiency of electron–hole pairs in the composite nanomaterial. The photocatalytic mechanism was further elucidated through radical scavenging experiments, confirming that ·OH and h+are the main active species in the degradation process.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Changcheng Sun,Lyumeng Ye,Peng Lu,Xianhui Yan,Jianhang Huang,Zhixiong Tang,Dongyao Chen,Chaoping Cen
The key point to broaden the operating temperature window for synergistic control of NO x and oxygenated volatile organic compounds (OVOCs) with high NO x /VOCs conversion and N 2 /CO 2 selectivity relies on development of appropriate catalysts. Herein, a silver-modified Mn/HZSM-5 catalyst was designed, which achieved an effective NO x and acetone co-removal activity and maintained over 90 % N 2 /CO 2 selectivity at a broad temperature range from 293 to 400 °C. The excellent performance of MnAg/HZSM-5 was due to large surface area, plenty of oxygen vacancies and Lewis acid sites, as well as outstanding oxygen mobility and reducibility that derived from the interactions between Mn 4+ /Mn 3+ and Ag + /Ag 0 . NO x reduction followed both Eley-Rideal and Langmuir-Hinshelwood mechanisms, while acetone hardly replaced NH 3 as a reduction agent. Acetone oxidation underwent acetone → acetate → formate → carbonate → CO 2 and H 2 O following a Mars-van Krevelen mechanism. NH 3 participated in acetone oxidation, forming amide and nitrile species, which caused catalyst deactivation and secondary pollution.
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JOURNAL OF MOLECULAR STRUCTURE
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2025
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IF 4.7
Xiongyi Peng,Jianyu Li,Xujia Cao,Jiarui Zhang,Yongqiang Li,Yufeng Liu
Constructing semiconductor composites composed of multiphase heterojunctions has been considered as an effective strategy for designing promising photocatalyst systems. In this work, a novel ternary heterojunction photocatalyst was prepared by integrating MoS 2 semiconductor nanoflowers with silver doped covalent organic frameworks (COFs) and used for photocatalytic degradation of antibiotics. The regular pore structure and solid skeleton of COFs matrix optimize the distribution of constituent units, making Ag-MoS 2 nanoflower uniform and highly dispersed on the COFs material matrix. Moreover, the silver nanoparticles in the catalyst acted as an electron mediator, which inhibited the recombination of charge carriers, and effectively enhanced the photocatalytic activity of Ag-MoS 2 @COF. The as-prepared Ag-MoS 2 @COF ternary heterojunction photocatalyst exhibited high degradation efficiency for tetracycline (TC), reaching 90.1 % after 50 min of visible light irradiation, which was superior to most heterojunction photocatalysts. The Ag-MoS 2 @COF also demonstrated good reusability, almost maintaining the initial photocatalytic efficiency after 5 cycles. In addition, the plausible direct solid-state Z-scheme photocatalytic mechanism for TC degradation with Ag-MoS 2 @COF ternary catalyst under visible light irradiation was proposed according to LC-MS analysis, radicals trapping experiment and photoelectric chemical test. This work provides a new paradigm for the design and development of COF-based ternary heterojunction photocatalysts for environmental remediation.
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Nanoscale
·
2024
·Vol. 16
·期 28
·13654-13662
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IF 5.8
Naiwei Wei,Hong Zhu,Danni Yan,Shuai Yang,Lili Xu,Shengli Zhang,Yuhui Dong,Yousheng Zou,Haibo Zeng
I–III–VI quantum dots (QDs) have gained widespread attention owing to their significant advantages of non-toxicity, large structural tolerance, and efficient photoluminescence potential. However, the disbalance of reactivity between the elements will result in undesired products and compromised optical properties. Reducing the activity of highly reactive group IB elements is the most common approach, but it will reduce the overall reactivity and lead to a wide dispersion of QD sizes. In this study, we propose a method to improve the overall reactivity of the reaction system using the highly active IIIA precursor InI3, which triggers rapid nucleation and promotes the formation of Ag(In,Ga)S2 (AIGS) QDs, resulting in monodisperse particle size distributions and a significantly improved photoluminescence quantum yield (PLQY) (from 12% to 72%). Furthermore, narrow band edge emission is realized by coating a gallium sulfide (GaSx) shell on the basis of obtaining high-quality AIGS QDs. The core/shell QDs exhibit a 90% PLQY with a full width at half maximum (FWHM) of only 31 nm at 530 nm. This study provides a viable design strategy to synthesize monodisperse AIGS QDs with a narrow peak width and efficient luminescence, promoting the application of AIGS QDs in the field of luminescent displays.
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高影响因子
ACS Applied Polymer Materials
·
2024
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IF 4.4
Keduo Yan,Lan Xu,Adnan Ahmed
Due to the rapid development of information technology and the trend toward miniaturization of electronic equipment, the research on electromagnetic interference (EMI) shielding materials is rapidly moving toward low-dimensional, core–shell, and lightweight directions, with a wide range of application prospects in various fields. In this study, using pDA as a binder, poly(vinylidene difluoride) (PVDF)/Fe3O4@pDA@Ag nanofiber membranes (NFMs) with a multicore–shell structure were prepared by in situ growth of Ag nanoparticle (NP) layers on the fiber surface of electrospun PVDF/Fe3O4 NFMs fabricated in batch. Compared to PVDF@pDA@Ag NFM, the average EMI shielding efficiency (SE) of PVDF/Fe3O4@pDA@Ag NFM reached 82.31 dB because of the increased hysteresis and multireflection losses inside the NFM caused by the moderate addition of Fe3O4 NPs. In addition, the synergistic effect of Fe3O4 and Ag NPs increased the microwave attenuation and impedance matching of composite NFM, further enhancing its EMI SE.
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MATERIALS SCIENCE & ENGINEERING R-REPORTS
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2025
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IF 26.8
Song Luo,Xiaohe Tian,Li Pan,Runhua Zhou,Shunda Zhu,Zuyi Yan,Kui Rao,Bo Liu,Shaofei Wang,Hong Wu
With the increasing severity of urban heat islands, personal thermal management (PTM) has emerged as a critical solution for maintaining human thermophysiological comfort in dynamic environments. Traditional air conditioning systems are energy-intensive and lack individualized control, highlighting the need for efficient, low-energy PTM strategies. Current PTM materials often operate in static modes, limiting their adaptability to varying conditions. To overcome this, we developed a Janus-structured humidity-photothermal actuator (TpPa-SO₃H/Ag@M) by integrating a TpPa-SO₃H covalent organic framework (COF) for rapid water transport and a silver nanoparticle (AgNP)-intercalated MXene (Ag@M) for humidity gradient formation and enhanced photothermal conversion. The COF layer facilitates moisture accumulation, while the Ag@M laminar structure delays water diffusion, enabling a sensitive humidity response. AgNPs expand the MXene interlayer spacing, improving water uptake and response efficiency by triple compared to initial TpPa-SO₃H/MXene systems, while also preventing structural collapse during cycling. Additionally, AgNPs enables strong solar absorption, boosting photothermal performance. Under combined humidity and light stimulation, the Janus actuator exhibits dynamic bending, enabling autonomous sweat evaporation and body temperature regulation without external energy input. This dual-responsive design offers a promising approach for adaptive, energy-efficient PTM in extreme environments.
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COLLOIDS AND SURFACES B-BIOINTERFACES
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2020
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IF 4.389
Yue Yu,Yimin Sun,Xiong Zhou,Yurong Mao,Yunxiu Liu,Ling Ye,Li Kuang,Jing Yang,Yi Deng
Polyetheretherketone (PEEK) has been well concerned as a promising material for hard tissue repair because of its outstanding mechanical behavior and superior biocompatibility. However, its clinical application is limited by its biological inertness and the susceptibility to bacterial infection during implantation. To improve the original shortcomings, self-polymerized dopamine (PDA) was used to enrich silver ions on the PEEK surface. Moreover, a layer of carboxymethyl chitosan (CMC) film was formed on the PEEK surface by the spin-coating method, aiming to control the release of silver ions on the surface. At the same time, bone forming peptide (BFP) was modified onto the PEEK surface by 1-(3-dimethylaminopropyl)-3-ethylcarbonimide hydrochloride (EDC) / N-hydroxy succinimide (NHS). The characterization results showed that PEEK-Ag-CMC-BFP could be obtained successfully. The inhibition zone and bacterial kinetic curve showed a favorable inhibitory effect of the sliver-modified PEEK on gram-negative and gram-positive bacteria. In vitro experiments exhibited that PEEK-Ag-CMC-BFP had a better biological activity than that of PEEK, which could promote cell proliferation and osteogenic differentiation. It is expected that this dual-function material with antibacterial and bone-promoting properties has a vast potential applied in the field of hard tissue repair.
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高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2017
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IF 2.552
Yanxiang Zhang,Juan Wu,Yangyang Deng,Yanjun Xin,Huiling Liu,Dong Ma,Nan Bao
Ag/GO/g-C 3 N 4 composites were successfully synthesized by a sonochemical method. The structure and properties of the composites at various Ag loadings were characterized, and the Ag nanoparticles were confirmed by XRD, TEM and XPS measurements. UV–Vis diffuse reflectance spectra showed the presence of surface plasmon peak for Ag at 550 nm. The Ag/GO/g-C 3 N 4 composites demonstrated excellent activity in photocatalytic degradation of Rh B under visible light irradiation, and 5% of Ag nanoparticle was found to be the most suitable loading. The enhanced photocatalytic activity was ascribed to the role of GO nanosheets and Ag nanoparticles. The GO nanosheets acted as electrons transporter and acceptor in the composite and inhibited the charge recombination. The Ag nanoparticles acted as an electron traps to facilitate the separation of photogenerated electron-hole pairs and promoted interfacial electrons transfer. The OH ads and h + were the major radicals to be involved in the photocatalytic process.
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APPLIED CLAY SCIENCE
·
2022
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IF 5.907
Hongjing Cheng,Zhaohua Yang,Feipeng Du,Hui Liu,Qiao Zhang,Yunfei Zhang
Recently, developing facile, cheap, and efficient nano‑silver catalysts for the reduction of waste 4-nitrophenol (4-NP) to useful 4-aminophenol (4-AP) has attracted more and more attention. In this study, a facile mechanical foaming method was used to fabricate Ag/halloysite nanotubes/polyvinyl alcohol sponges (Ag/Hal/PVA) for enhanced degradation of 4-NP. It included the preparation, morphology and composition characterization, and catalytic performance test of Ag/Hal/PVA. The morphology and composition of Ag/Hal/PVA were characterized by field emission scanning electron microscopy , Fourier transform infrared spectra , Raman spectra , X-ray photoelectron spectroscopy, thermo-gravimetric analysis, and XRD, respectively. BET and UV–vis spectrum measurements were used to test the adsorption and catalytic performance of Ag/Hal/PVA for 4-NP. The results showed that silver nanoparticles (AgNPs) were evenly distributed in the Hal/PVA sponge. Moreover, halloysite nanotubes (Hal) greatly improved the specific surface area and the loading capacity for AgNPs of the sponge due to the hollow tubular structure of Hal. The specific surface area of the Ag/Hal/PVA was about 1.62 m 2 /g. The obtained Ag/Hal/PVA exhibited a good catalytic activity and the apparent rate constant was 0.297 min −1 , and a good stability up to 5 cycles without a significant loss of its catalytic activity. This study provided a facile strategy for the development of cheap Ag/Hal/PVA sponges for high efficient reduction of 4-NP, which has potential application in the filed water treatment
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ACS Applied Materials & Interfaces
·
2017
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IF 7.504
Yanyan Cui,Jian Yang,Qunfang Zhou,Ping Liang,Yaling Wang,Xueyun Gao,Yongtian Wang
Albumin-stabilized Ag nanodots (ANDs) are prepared by a one-step biomineralization method. The highly crystallized nanodots have ultrasmall sizes (approximately 5.8 nm) and robust X-ray attenuation (5.7313 HU per mM Ag). The unlabeled ANDs are directly excreted from the body via the urine after in vivo X-ray computer tomography (CT) imaging application. ANDs could be used as CT imaging agents and effective photothermal therapy agents. Tumor growth inhibition reaches 90.2% after photothermal treatment with ANDs. ANDs are promising tools for in vivo CT imaging and clearable near-infrared-triggered theranostic agents.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2026
·
IF 10.6
Lihao Lv,Wei Cao,Kairui Liu,Chong Li,Jingfeng Wang,Lei Guo,Zhijun Ding,Peichang Shi,Chun Li,Puhong Wang,Lingmin Yu
Ag-loaded SnO 2 nanofibers were successfully fabricated via electrospinning combined with an in situ reduction strategy. • The Ag loading activates the lattice oxygen in SnO 2 , enabling it to participate in the gas sensing process. • The response value of SnO 2 with 2 mol% Ag to 100 ppm is 79 times that of pure SnO 2 . • The enhanced sensing mechanism is systematically elucidated through XPS, EPR, and DFT calculations. TEA is a highly flammable and neurotoxic volatile organic compound; prolonged exposure can lead to emphysema and even immediate death, making the development of rapid, highly responsive TEA gas sensors an urgent priority. Although tin dioxide (SnO 2 )-based sensors have been extensively studied, they suffer from low sensitivity and high operating temperatures. In this study, silver-loaded tin dioxide nanofibers (Ag-SnO 2 NFs) with a porous hollow structure were fabricated using electrospinning combined with in-situ reduction technology. The Schottky junction at the Ag-SnO 2 interface triggers interfacial electron redistribution, thereby activating lattice oxygen (O L ) in SnO 2 and converting it into adsorbed oxygen species, which enhances the gas-sensing performance for TEA. At 200℃, the AS-2 sensor exhibited a response value of 2163.6 for 100 ppm of TEA, which is 79 times that of pure SnO 2 , and demonstrated fast response and recovery times (48 s/44 s). In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and density functional theory (DFT) calculations further elucidated this mechanism. This study provides a new mechanistic insight into how noble metal modification activates lattice oxygen and converts it into adsorbed oxygen to enhance gas sensing performance, offering rational design principles for advanced gas sensors targeting harmful volatile compounds. Download: Download high-res image (151KB) Download: Download full-size image
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