Journal of Water Process Engineering
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2024
·
IF 6.3
Heng Yu,Hongliang Zhang,Chenyang Zhang,Wei Sun,Mingjun Han,Rong Wang,Xin Wei,Songjiang Li
With the increased use of silver in industry, a lot of wastewater containing silver is produced. If this wastewater is not treated, it will seriously impact both the ecological environment and human life. In order to effectively remove Ag + from silver-containing wastewater, this study innovatively developed a natural mineral-based adsorption material (galena). The effects of reaction time, galena dosage, starting concentration, initial particle size, temperature, and solution pH on Ag + removal were first studied using batch studies. The outcomes demonstrated that the initial Ag + concentration of 50 mg/L reduced to 0.086 mg/L with the reaction duration of 15 min, the galena dose of 5 g/L, the initial particle size of −400 mesh (38 μm), the reaction temperature of 25 °C, and the pH of 5. The adsorption results show that the removal behavior of Ag + by galena is consistent with the pseudo-second-order adsorption kinetic model and the Freundlich isothermal adsorption model, with the maximum adsorption amount of 18.78 mg/g. Solution chemical analysis shows that in the Ag + -NO 3 2− -Pb 2+ -S 2− system, Ag + mainly reacts with S 2− and forms a precipitate at pH = 5–6. SEM-EDS, FT-IR, and XPS analysis also showed that S 2− and Ag + are bound together as Ag 2 S in the galena surface. Orbital hybridization of the 4d orbitals of Ag + with the S 2− 3p orbitals occurs during the adsorption process according to density functional theory (DFT) calculations. During the adsorption process, Ag + undergo charge transfer with S 2− in the surface of galena.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2013
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IF 2.108
Wanshi Yang,Tengfeng Xie,Tengfei Jiang,Dejun Wang
In this paper, Ag 2 S nanoparticles (NPs) are prepared by a simple one-step hydrothermal synthesis. Various particle diameters of Ag 2 S NPs are obtained under different concentrations of surfactants. A mechanism for the nucleation and growth of Ag 2 S NPs under the influence of surfactants is proposed. X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and UV–vis absorption spectroscopy are used to characterize the obtained product. In order to investigate the photoelectric properties of the Ag 2 S NPs, surface photovoltage (SPV) technique was studied. The Ag 2 S NPs perform intense photoelectric response in the range of NIR and visible region, which could be applied in photoelectric detector.
研究领域:
纳米材料
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光电材料
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纳米技术
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材料科学
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DOI
高影响因子
CHEMICAL PAPERS
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2022
·Vol. 77
·期 1
·207-217
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IF 2.146
Li Hongxia,Liu Yongdong,Gao Xiang,Niu Xiaohui,Fan Haiyan,Wang Kunjie
Using chitosan as raw material, a composite-featured chitosan/Ag 2 S/carbon quantum dot (CS/Ag 2 S/CQDs hydrogels) was synthesized by successfully uploading carbon quantum dots (CQDs) and silver sulfide (Ag 2 S). According to the SEM and TEM characterization of the material, the hydrogel material has a rich pore-like structure, which can absorb wound tissue fluid and promote wound healing. Staphylococcus aureus (Gram-positive), Escherichia coli (Gram-negative) and methicillin-resistant Staphylococcus aureus were used as model bacteria to test the antibacterial effect of CS/Ag 2 S/CQDs. This material not only has excellent inhibitory effect on common bacteria (the inhibitory rate of E. coli and S. aureus is 86% and 67%, respectively), but also has good inhibitory effect on drug-resistant bacteria (the inhibitory rate of MRSA is 73%). The bacterial toxicity test showed that CS/Ag 2 S/CQDs hydrogel had low toxicity. Meanwhile, CS/Ag 2 S/CQDs hydrogels degraded 28.39% of the hydrogels during a 7 days biodegradation. Its excellent bacteriostatic and degradable properties make it a potential candidate for a new type of medical dressing for clinical application.
研究领域:
材料科学
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生物医学工程
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微生物学
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
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IF 22.1
Shiwei Guan,Zhenhao Hou,Ji Tan,Xianming Zhang,Junyu Liu,Huihui Du,Hongqin Zhu,Yuqin Qiao,Zixiao Liu,Xuanyong Liu
Near-infrared (NIR) light-triggered photocatalysis antibacterial therapy has attracted significant attention. Herein, we designed a straddle-type heterostructure film of ZnS/Ag 2 S nanorod on the titanium implant, which showed excellent NIR photocatalytic ability. Under NIR, the electrons of Ag 2 S cascaded jump to ZnS conduction band (CB), and the electron of ZnS was half-jumped to Ag 2 S valence band (VB). The VB of Ag 2 S acted as a consumption platform for the holes of Ag 2 S and the electrons of ZnS, improving photocatalytic efficiency. To prove the feasibility of this mechanism, another straddle-type heterostructure of ZnS/Bi 2 S 3 with similar energy band structure was fabricated, and its NIR photocatalytic ability was also distinctly enhanced. Furthermore, the ZnS/Ag 2 S heterostructure films rapidly removed bacteria in vitro and in vivo under the NIR irradiation. This work innovatively discovered NIR photocatalytic effect of the straddle-type heterostructure, which complemented the design of heterostructures in photocatalysis.
研究领域:
材料科学
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生物医学工程
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光催化技术
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产品关联
DOI
高影响因子
CHEMICAL PAPERS
·
2019
·Vol. 74
·期 5
·1517-1524
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IF 1.246
Wang Kunjie,Liang Lei,Xu Jialin,Li Hongxia,Du Mei,Zhao Xiaoliang,Zhang Deyi,Feng Huixia,Fan Haiyan
The present work aims to combine carbon quantum dots (CQDs) with the good water solubility, biocompatibility, and low toxicity and nano-sized silver sulfide with excellent antibacterial effect in the synthesized composite. The composite was further treated with polyethyleneimine (PEI) and conjugated with graphene oxide (GO). The as-prepared composite Ag 2 S–CQDs–PEI–GO exhibits a core of Ag 2 S with the size of 20–50 nm and the shell of CQDs with the average particle size of 1.8 nm. The core shell structure is loaded on the template of PEI–GO. Strong antibacterial effect was observed on Ag 2 S–CQDs composite against four strands of bacteria Staphylococcus aureus ( S. aureus ), Escherichia coli ( E. coli ), Enterococcus faecalis ( E. faecalis ), and Pseudomonas aeruginosa ( P. aeruginosa ). We briefly discussed the bacteriostatic mechanism of the composite. The as-prepared composite has huge potential in the development of biomedicine.
研究领域:
生物医学
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材料科学
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DOI
高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
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2018
·Vol. 16
·期 1
·1-15
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IF 5.294
Zhang Xiao-Shuai,Xuan Yang,Yang Xiao-Quan,Cheng Kai,Zhang Ruo-Yun,Li Cheng,Tan Fang,Cao Yuan-Cheng,Song Xian-Lin,An Jie,Hou Xiao-Lin,Zhao Yuan-Di
Background Ag 2 S has the characteristics of conventional quantum dot such as broad excitation spectrum, narrow emission spectrum, long fluorescence lifetime, strong anti-bleaching ability, and other optical properties. Moreover, since its fluorescence emission is located in the NIR-II region, has stronger penetrating ability for tissue. Ag 2 S quantum dot has strong absorption during the visible and NIR regions, it has good photothermal and photoacoustic response under certain wavelength excitation. Results 200 nm aqueous probe Ag 2 S@DSPE-PEG 2000 -FA (Ag 2 S@DP-FA) with good dispersibility and stability was prepared by coating hydrophobic Ag 2 S with the mixture of folic acid (FA) modified DSPE-PEG 2000 (DP) and other polymers, it was found the probe had good fluorescent, photoacoustic and photothermal responses, and a low cell cytotoxicity at 50 μg/mL Ag concentration. Blood biochemical analysis, liver enzyme and tissue histopathological test showed that no significant influence was observed on blood and organs within 15 days after injection of the probe. In vivo and in vitro fluorescence and photoacoustic imaging of the probe further demonstrated that the Ag 2 S@DP-FA probe had good active targeting ability for tumor. In vivo and in vitro photothermal therapy experiments confirmed that the probe also had good ability of killing tumor by photothermal. Conclusions Ag 2 S@DP-FA was a safe, integrated diagnosis and treatment probe with multi-mode imaging, photothermal therapy and active targeting ability, which had a great application prospect in the early diagnosis and treatment of tumor.
研究领域:
生物医学工程
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纳米医学
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肿瘤学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF FLUORESCENCE
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2018
·Vol. 28
·期 4
·863-869
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IF 1.665
Xu Xiao,Chen Hao,Cao Yuancheng,Lin Yongjun,Liu Jun’an
Here, we report the synthesis and characterization of CoFe 2 O 4 doping Ag 2 S dendrimer-modified nanoparticles (CoFe 2 O 4 -Ag 2 S DMNs) in Cry1Ab protein detection and imaging. The near-infrared Ag 2 S quantum dots were first prepared by using the thermal decomposition method, followed by modification of the water-soluble quantum dots using the method of solvent evaporation and ligand exchange, and finally the fluorescent magnetic bifunctional nanoparticles were obtained by binding with CoFe 2 O 4 . As-prepared CoFe 2 O 4 -Ag 2 S DMNs were characterized by fluorescence (FL) spectroscopy and transmission electron microscopy (TEM). Results showed that Ag 2 S DMNs could sensitively detect Cry1Ab both in vitro and in vivo. In vitro, the enhanced FL intensity as a function of the concentration is notably consistent with the Langmuir binding isotherm equation in the range of 0–200 ng/mL of Cry1Ab proteins. The detection limit of this method was found to be 0.2 ng/mL. Meanwhile, the fluorescence wavelength was extended to the second near-infrared range (NIR-II, 1.0~1.4 μm), which enables in vivo imaging. This study highlights the importance of NIR QDs doping magnetic materials as a new method to trace Bacillus thuringiensis (Bt) in insects and their potential applications in in vivo NIR tissue imaging.
研究领域:
生物化学
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分子生物学
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纳米医学
✓ 已验证
DOI
高影响因子
Aggregate
·
2024
·Vol. 5
·期 4
·e561
·
IF 13.9
Chengcheng Xing,Ruijuan Qi,Yi Chang,Xiaoming Ma,Yan Lei,Shuangquan Zang,Zhi Zheng
Silver sulfide thin film, with excellent thermoelectric properties, is few reported due to the complex and time-consuming high-temperature or high-pressure synthesis process. Here, a fast ionic conductor n-type Ag 2 S film with good crystallinity and uniform density is prepared by sputtering metal Ag films of different thicknesses on glass and then reacting in S precursor solution at low temperature. At 450 K, β -Ag 2 S films can be obtained and underwent a phase transition from α -Ag 2 S monoclinic, which had a significant effect on their electrical and thermal properties. The grain size of Ag 2 S films increases with the increase of film thickness. Before and after the phase transition, the carrier concentration and mobility cause obvious changes in the electrical properties of Ag 2 S. The carrier concentration of body-centered cubic phase β -Ag 2 S is about three orders of magnitude higher than that of monoclinic phase α -Ag 2 S, and the mobility is also 2–3 times that of the latter. Especially, after the phase transition, the conductivity of β -Ag 2 S rises exponentially from the zero conductivity of α -Ag 2 S and increases with the increase of temperature. The Ag 2 S film shows the highest figure of merit of 0.83 ± 0.30 at 600 K from the sample with ∼1600 nm thickness, which is the highest record among Ag 2 S-based thermoelectric materials reported so far.
研究领域:
材料科学
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热电材料
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DOI
高影响因子
Advanced Materials Interfaces
·
2021
·Vol. 8
·期 9
·2002255
·
IF 6.147
Yan Lei,Longyan Gu,Xiaogang Yang,Yuan Lin,Zhi Zheng
The rigid nature of inorganic semiconductors makes them rarely use in flexible devices till now. For the first time, ductile-metal Ag is used as buffering layer to bond the inorganic semiconductor thin films and polymer substrate forming a sandwich structure, which has outstanding flexible photoelectric character. The ductile thin Ag layer under Ag 2 S thin film acts as electrode and buffering material between the Ag 2 S and polyimide (PI) layers. The strong bonding interaction between Ag 2 S and Ag can reduce the stress force in Ag 2 S thin films that is generated during bending, which enhances its flexibility. The resulted Ag 2 S/Ag/PI film shows excellent electrical performance retentivity. After more than 10 4 cycles bending test, the conductivity of the Ag 2 S/Ag/PI films has almost not changed. The prepared Au/PEDOT:PSS/Ag 2 S/Ag/PI photodetectors are stable in air or N 2 . It can bear a small bending radius as low as 1.5 mm for ≈4000 bending cycles test without drastic performance decay. In addition, the Ag 2 S/Ag based flexible photodetectors show a wide spectral response from ultraviolet to near infrared.
研究领域:
材料科学
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光电子学
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柔性电子学
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纳米技术
✓ 已验证
DOI
高影响因子
Journal of Biomaterials and Tissue Engineering
·
2022
·Vol. 12
·期 9
·1683-1691
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IF 0.144
Li Hongxia,Gao Xiang,Niu Xiaohui,Zhang Deyi,Fan Haiyan,Wang Kunjie
The emergence of bacterial resistance to traditional antibiotics and its global spread has brought huge threats to human life and health, and the need for new alternative antibacterial agents has become increasingly urgent. The rapid development of nanoscience provides a potential alternative
to antibacterial therapy. In this study, g-C3N4 was synthesized using melamine as the raw material. It was then successfully combined with carbon quantum dots (CQDs) and silver sulfide to synthesize a g-C3N4/CQDs/Ag2S composite material.
Such combination narrows the band gap of g-C3N4 from 2.53 eV to 2.21 eV and enhances the photocatalytic efficiency. Consequently, it indicated photocatalytic antimicrobial effects against three strands of bacteria, Shylococcus aureus (Grampositive), Escherichia
coli (Gram-negative) and Methicillin-resistant Staphylococcus aureus under the irradiation of visible light. Other than the common pathogens, g-C3N4/CQDs/Ag2S exhibited an appreciable inhibition against the well-known drug-resistant bacteria. With
its antimicrobial features and excellent photoelectric properties, the as prepared nanocomposites show its potential in the development of new antimicrobial and photocatalytic materials.
研究领域:
材料科学
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微生物学
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纳米医学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Yongli Cao,Song Li,Xiaodi Yu,Wenhua Li,Zhishan Bo
Hybrid nanocrystals (NCs) with multiple components and junctions have attracted considerable attention due to their promising synergistic properties. In particular, great attention has been paid to the manipulation of buried multijunction heterointerfaces because they are closely related to the surface energy and carrier transfer of NCs. However, heterointerfaced NCs are usually constructed by sequential step-by-step pathways, and buried interfaces can only be formed along a given direction, resulting in the one and only spatial orientation of multiple interfaces. In this work, we demonstrate two types of Au-Ag 2 S-Cu 2-x S NCs with disparate interfacial features. Specifically, the first type (Type I) is prepared through a routine two-step method and shows that Au domain close to the Ag 2 S-Cu 2-x S interface; another type (Type II) is achieved by a facile one-pot synthesis procedure and contains Au domain with an interphase only with the Ag 2 S domain, far from the Cu 2-x S domain. More importantly, type II NCs could not be formed through other traditional strategies and an underlying mechanism of formation is developed by monitoring the evolution process. Au@Ag core–shell NCs, metastable Au@Ag 2 S NCs and Janus Au-Ag 2 S NCs are formed successively before the Cu 2-x S domain appears. We speculate that the Au@Ag 2 S intermediate plays an essential role in building the final complex nanostructure . We expect that such a simple and facile one-pot method will be used to fabricate additional asymmetric multicomponent NCs with distinctive interfacial features and promising potential applications.
研究领域:
材料科学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Applied Materials Today
·
2023
·
IF 8.3
Jingwen Wu,Tian Deng,Qian Wu,Yun Qiu,Yan Wei,Qin Zhao,Yufeng Zhang
Many efforts have been made to treat infections; however, it is difficult to treat bacterial infections effectively with a single antibacterial strategy. Therefore, it is imperative to develop drugs or materials with multiple synergistic mechanisms. Graphene oxide/silver sulfide (GO/Ag 2 S) heterostructure would become potential nano-antibiotics that display a synergistic photothermal/photodynamic antibacterial mechanism. The material was characterized with different tests, meanwhile, density functional theory (DFT), electrochemical tests, and electron paramagnetic resonance (EPR) were also tested. The heterostructure nanosheets showed significant therapy via effective photothermal/photodynamic conversion and displayed antibacterial activity against both gram-positive S. aureus and gram-negative E. coli . In addition, we found that GO/Ag 2 S heterostructure could disrupt the integrity of bacterial membranes and inhibit the growth of bacteria. We confirmed its antibacterial effects in subcutaneous abscess models as well. Therefore, GO/Ag 2 S heterostructure could be a viable alternative option for antibiotic development.
研究领域:
材料科学
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纳米技术
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生物医学工程
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微生物学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）