POLYMER
·
2022
·
IF 4.432
Baojie Dou,Jianwu Lan,Shiying Lang,Yazhou Wang,Lin Yang,Hongyu Liu,Yafang Wang,Anrong Yao,Shaojian Lin
Development of multifunctional materials for efficient treatment of complex effluents containing water-insoluble oils and water-soluble dyes is highly desired. In this work, a multifunctional Ag/AgCl decorated CO 2 - responsive cotton membrane (Ag/AgCl@PCM) was successfully fabricated for simultaneous or successive removal of oils and dyes (both cationic and anionic dyes). Through achieving protonation and deprotonation in response to the CO 2 , the as-prepared Ag/AgCl@PCM could reversibly switch from superhydrophobic (uncharged) state to superhydrophilic (charged) state. Moreover, the Ag/AgCl endowed the Ag/AgCl@PCM with visible light photocatalytic activity . Based on these ingenious features, the as-prepared Ag/AgCl@PCM could bidirectional separation of various oil/water mixtures with high separation efficiencies (≥97.50%), accompanying with satisfactory fluxes, due to controllable wettability upon CO 2 stimulation. Moreover, the as-prepared Ag/AgCl@PCM exhibited stable oil/water separation property, even under various adverse environmental conditions. Meanwhile, the Ag/AgCl@PCM could eliminate the dyes in wastewater through adsorption for anionic dyes and photocatalysis for cationic dyes. The results presented that MB (anionic dye) could be efficiently removed by the Ag/AgCl@PCM under both static and dynamic states in the presence of CO 2 . The maximum static adsorption capacity of the Ag/AgCl@PCM toward MB reached 2168.47 mg g −1 with a fast adsorption rate (12 min of adsorption equilibrium time). For the removal of cationic dyes, the photo-degradation efficiency of the Ag/AgCl@PCM toward RhB (cationic dye) was up to 94.30% within 6 h. Most importantly, the as-prepared Ag/AgCl@PCM exhibited photo-induced self-cleaning performance due to the existence of Ag/AgCl, which endowed it with excellent recyclability. Additionally, the as-prepared Ag/AgCl@PCM displayed outstanding antibacterial activity . In summary, the Ag/AgCl@PCM could be viewed as a satisfactory material for oil/water separation and dyes removal and exhibits great potential in wastewater remediation.
研究领域:
环境科学
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材料科学
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水处理
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光催化
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膜技术
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jun Chen,Siyi Zhang,Yifei Xu,Jianning Cai,Yang Yang,Xin Wang,Chaoyue Chen,Jiamin Wei,Lianshe Fu,Tinghai Yang
The construction of visible-light catalysts to degrade water pollutants is significant in environmental governance and solar energy conversion. In this work, a novel Zn-MOF with unsaturated coordination sites was constructed using 1-(Carboxymethyl)-pyrazole-4-carboxylic acid as the organic ligand. Its crystal structure was studied through single crystal X-ray diffraction. To enhance visible light catalytic performance, ZnFe-MOF/AgCl-x Z-scheme heterojunction composites were constructed. The optimized ZnFe-MOF/AgCl-50 material exhibits excellent photocatalytic performance, which can degrade 90.33 % of levofloxacin in 21 min. The results indicate that Fe doping and the construction of the ZnFe-MOF/AgCl-x Z-scheme heterojunction not only broaden the responsive range to visible light, but also effectively promote the internal and interfacial charges transfer efficiency, leading to a superior catalytic performance. In addition, the Ag nanoparticles (NPs) generated during the photocatalytic process can serve as a bridge, achieving rapid charge transfer in Z-scheme heterojunction. This work can offer an innovative perspective for the development of novel and efficient MOF-based Z-scheme heterojunction photocatalysts for wastewater treatment applications.
研究领域:
环境科学
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材料科学
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光催化
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水处理
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Yinghua Li,Wenyue Yin,Mengxi Li,Jingwen Zhang,Lijun Chen
Ag/AgCl/Bi 2 O 3 /BiFeO 3 composite photocatalysts were synthesized by a simple co-precipitation and sono-chemical method, and their photocatalytic properties were investigated. The crystal structure, morphology, and elemental composition of the Ag/AgCl/Bi 2 O 3 /BiFeO 3 composite photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy-energy spectroscopy (SEM-EDS), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS). Carrier migration and separation studied by Uv–vis DRS and PL spectroscopy. XPS showed that Ag monomers were successfully reduced out. The photocatalytic activity of the composites was investigated by simulating sunlight (full-spectrum xenon lamp irradiation) irradiation of levofloxacin hydrochloride. The results showed that the composite photocatalyst had the highest photocatalytic activity at pH 8 of the prepared system, pH 7 of the reaction solution and Ag + concentration of 0.1 mol/L (44.3 wt% loading), and still had good photocatalytic activity after five cycles. Compared with Bi 2 O 3 /BiFeO 3 and Ag/AgCl, Ag/AgCl/Bi 2 O 3 /BiFeO 3 exhibited better photocatalytic activity. In addition, based on the radical scavenging experiments and electron spin resonance analysis, ·O 2 - , h + and ∙OH were the reactive groups that played a role in the reaction system, and a possible catalytic mechanism of Ag/AgCl/Bi 2 O 3 /BiFeO 3 was proposed.
研究领域:
材料科学
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环境化学
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光化学
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催化
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
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IF 6.182
Dong Liang,Junjun Luo,Yaliang Huang,Xiang Liang,Zaichun Zhou,Jianxiu Wang,Xiaoqing Qiu
In this study, we report the development of indirect Z-scheme heterojunction to construct a cathodic photoelectrochemical (PEC) sensor for highly-selective detection of endogenous H 2 S using AgCl-Ag core–shell nanostructures coupled with porous carbon nitride (PCN) as cathode materials. As an electron mediator, Ag on the Z-scheme heterojunction transformed to Ag 2 S in the presence of H 2 S, resulting in the destruction of original charge-carrier migration pathway. Meanwhile, photo-induced charges on the then formed AgCl-Ag 2 S/PCN cannot be as effectively separated as they are on AgCl-Ag/PCN due to the straddling energy band alignments. A decrease in cathodic signal may be expected. Consequently, the H 2 S concentration could be quantitated by such corresponding decrease, which thus underlines a novel signal-off cathodic PEC bioanalysis strategy. More importantly, the ‘Z-scheme’ PEC sensor based on AgCl-Ag/PCN exhibits analytical performance with high sensitivity, showing its potential to be applied to the areas of biomedical and health care etc.
研究领域:
分析化学
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环境科学
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生物医学工程
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DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2021
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IF 4.291
Ao Li,Linbei Xie,Sijie Zhou,Min Zhang,Yi Ding,Ping Wang
In this study, the magnetic core-shell nanomaterial Fe 3 O 4 /SiO 2 /N-TiO 2 /Ag/AgCl (FSNT/Ag/AgCl) that efficiently degraded methyl orange (MO) was produced. The dosages of tetrabutyl titanate (TBOT), urea and AgNO 3 were optimized by response surface methodology (RSM). Scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy analysis (XPS), energy dispersive spectrometer (EDS), X-ray diffractometer (XRD), fourier transform infrared spectrometer (FT-IR), and UV–vis diffuse reflectance spectrum (UV–vis DRS) were used to characterize the nanomaterial. The particle size of FSNT/Ag/AgCl was 91.98 nm, and it presented a core-shell structure with Fe 3 O 4 as the core, SiO 2 and N-TiO 2 wrapped in Fe 3 O 4 , and Ag/AgCl deposited on the outermost layer. Performance and mechanism research experiments showed that under the optimized conditions of 1 g/L FSNT/Ag/AgCl, pH = 9, temperature of 35℃ and initial MO concentration of 10 mg/L, about 90 % of MO was degraded in 20 min. The mineralization rate was 35.2 % within 120 min. Holes (h + ) and superoxide anions (·O 2 − ) were the main active substances in the whole photocatalytic degradation. FSNT/Ag/AgCl could be recovered by magnet. After 5 repeated experiments, the degradation rate of MO within 100 min still reached 88.5 %. This work provides a recyclable core-shell nanomaterial for faster degradation of dye wastewater.
研究领域:
材料科学
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环境科学
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纳米技术
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化学工程
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
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2022
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IF 9.231
Dezhuang Gong,Xiquan Li,Xiuling Zhang,Wentao Zhang,Tianhao Chen,Xinhua Zhang
In this research, novel citrus-pectin-based [email protected] /graphite carbon nitride nanocomposites (CACNs) were formed by assembling citrus-pectin-based [email protected] ( [email protected] ) prepared by daylight-driven reduction onto a graphite carbon nitride (g-C 3 N 4 ) surface. The as-prepared samples were characterized by various techniques to study their morphology, structure, optical and electrochemical properties. The CACNs were found to have enhanced photoelectrochemical properties, which provided excellent photocatalytic activity to degrade the food colorant new coccine (NC) under visible light. For the NC degradation, the recommended photocatalyst offered approximately 95.7% of the degradation efficiency under visible-light irradiation for 60 min, which has superior photostability and reusability. Its degradation rate constant was approximately 5.16 and 37.6 times those of pure g-C 3 N 4 and [email protected] , respectively. The NC degradation conformed to pseudo-first-order kinetics. Thus, the developed nanocomposites provide a useful reference for the removal of hazardous food colorants and resource utilization of peel waste.
研究领域:
材料科学
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环境科学
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纳米技术
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光化学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2022
·Vol. 23
·期 24
·15558
·
IF 6.208
Shuang Li,Hui Zhang,Bailin Cong,Peiqing He,Wenqi Liu,Shenghao Liu
An additive- and pollution-free method for the preparation of biogenic silver and silver chloride nanoparticles ([email protected]NPs) was developed from the bacteriaShewanellasp. Arc9-LZ, which was isolated from the deep sea of the Arctic Ocean. The optimal synthesizing conditions were explored, including light, pH, Ag+concentration and time. The nanoparticles were studied by means of ultraviolet-visible (UV-Vis) spectrophotometry, energy dispersive spectrometry (EDS), X-ray diffraction (XRD) and inductively coupled plasma optical emission spectrometers (ICP-OES). The transmission electron microscope (TEM) showed that the nanoparticles were spherical and well dispersed, with particle sizes less than 20.00 nm. With[email protected]nanoparticles, the kinetic rate constants for congo red (CR) and rhodamine B (RhB) dye degradation were 2.74 × 10−1min−1and 7.78 × 10−1min−1, respectively. The maximum decolourization efficiencies of CR and RhB were 93.36% and 99.52%, respectively.[email protected]nanoparticles also showed high antibacterial activities against the Gram-positive and Gram-negative bacteria. The Fourier transform infrared spectroscopy (FTIR) spectrum indicated that the O-H, N-H and -COO- groups in the supernatant of Arc9-LZ might participate in the reduction, stabilization and capping of nanoparticles. We mapped the schematic diagram on possible mechanisms for synthesizing[email protected]NPs.Keywords:[email protected]nanoparticles;synthesis mechanisms;Shewanellasp.;dye reduction;antibacterial activity
研究领域:
纳米技术
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环境科学
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微生物学
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材料科学
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Chongjun Huang,Meng Xiao,Hao Cui,Jiayin Wang,Yurou Cai,Yu Ke
Antibacterial sodium carboxymethyl cellulose (CMC) gels were prepared via immobilizing ZnO and/or Ag/AgCl in situ to inhibit the aggregation of nano-photocatalyst. Epichlorohydrin was used as a crosslinking agent to prepare CMC gel, simultaneously introducing chlorine-containing branch chains as Cl reservoir to deposit AgCl. The composite gels presented pH responsive swelling properties, with the minimum swelling ratio at pH 8 and pH 4 for CMC gels containing Ag/AgCl and ZnO, respectively. Zn 2+ release from the nanocomposite gels was much greater in acidic than in neutral. Photocatalytic degradation constants of methyl orange by the composite gels under sunlight were greater than UV irradiation. Ag/AgCl loaded gel showed a degradation rate of 71.3 % under sunlight for 1 h, with a rate constant approximately 10.2 times higher than ZnO loaded gel. Extract liquids with the gel content below 0.33 mg/mL were noncytotoxicity. The nanocomposite gels presented good bactericidal rate against E. coli and S. aureus under sunlight for 6 h, comparatively to those in dark for 24 h. Bacteriostatic activity of Ag/AgCl loaded gel under sunlight for 6 h was much greater than that in dark for 24 h. The biocompatible nanocomposite gels with sunlight-catalyzed antibacterial activity would broaden the application of CMC gels.
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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环境科学
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化学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Qiaojie Luo,Zhenzhen Zhang,Yadong Chen,Chang Shu,Yajie Cheng,Yanji Lu,Jiajia Xu,Xiaodong Li
Deep caries management faces a critical dilemma: preserving pulp vitality versus ensuring durable restoration. Current dentin bonding technique and materials fail to eliminate residual pathogens in preserved soft dentin or stabilize resin-dentin interfaces against enzymatic/microbial degradation. Here, we present a light-programmable AgCl@Ag nanoparticle system that overcomes these dual challenges through dynamic nanochemistry. By orchestrating in situ AgCl deposition and photoreduction, our strategy achieves three breakthroughs: (1) Structural reinforcement: Polarity-driven Ag + chelation masks polar groups in demineralized dentin matrix (DDM), releasing interface confined water while doubling DDM modulus, greatly enhancing BisGMA infiltration to realize hermetic seal at the cavity periphery; (2) Sequential antibacterial action: Ag + rapidly penetrates biofilms to form AgCl NPs, followed by light-triggered transformation from AgCl NPs to AgCl@Ag NPs to generate Cl₂/HClO for residual pathogen eradication, to achieve a bacteria-free environment; (3) Self-stabilizing interface: Reducible AgCl@Ag nanoparticles inhibit MMPs and resist microbes and aging-induced delamination. This photo-responsive system eliminates secondary caries risk while maintaining pulp vitality, seamlessly integrating with clinical workflows. Through spatiotemporal control of silver chemistry, we redefine dental adhesion as intelligent platform to construct a biointerface that concurrently achieve sterilization, structural optimization, and enzymatic resistance. Our work establishes a paradigm for adaptive material design in moist biological environments, with implications extending to bone adhesives and chronic wound management.
研究领域:
牙科材料
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纳米医学
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抗菌治疗
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粘接牙科学
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生物界面工程
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产品关联
DOI
高影响因子
IEEE SENSORS JOURNAL
·
2023
·Vol. 23
·期 4
·3475-3484
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IF 4.3
Jiawen Yin,Wei Chen,Wanlei Gao,Xin Zhang,Bo Tang,Qinghui Jin
Considering the indispensable of pH for tap water, a pH sensor with the characteristics of an implantable, long-term stable, and long lifetime is urgently needed for on-line and in situ pH monitoring in tap water, but this is always a challenging issue. In this article, a competitive integrated electrochemical pH sensor is developed and batch manufactured via micro-electro-mechanical system (MEMS). A dense and ultrasensitive IrOx electrode is obtained for almost 1.5 times Nernst response (−82.88 mV/pH), after preparation process optimization. A Si-Si3N4-KCl agar gel-polydimethylsiloxane (PDMS) multilayer structured Ag/AgCl electrode is designed and proven to be a long lifetime (>40 days) and be stable. By integrating with the IrOx film and solid-state Ag/AgCl electrode on a mini chip and verifying the effectiveness of the as-fabricated sensor by pH detection, the miniature pH sensor demonstrates wide detection range (1.8–12), stirring sensitivity, desirable linearity ( ${R}^{2}=0.999$ ), ideal repeatability and good resistance to other interference substances. Particularly, by employing the mass-production technique, favorable response consistency (relative standard deviation (RSD) < 2%) is witnessed, offering the opportunity to mass-produce the proposed sensor in the future. What’s more, the sensor still kept 91.7% sensitivity when compared to the sensitivity obtained at its initial state, after continuously operating for 32 days. Undoubtedly, the sensitive, durable, miniaturized, and mass-produced pH sensor proposed in this article is a competitive device to implant into the water pipeline for pH in situ online monitoring.
研究领域:
生物医学工程
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微纳传感技术
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环境监测
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电化学传感器
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转化医学
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水质分析
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植入式器件
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DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 106
·61736-61742
·
IF 3.708
Shu-Tao Gao,Wei-Hua Liu,Ning-Zhao Shang,Cheng Feng,Qiu-Hua Wu,Zhi Wang,Chun Wang
Efficient utilization of solar energy has received tremendous attention due to the increasing environmental and energy concerns. In this paper, a plasmonic photocatalyst integrated with metal–organic framework (MOF) material, Ag/AgCl@ZIF-8, was fabricated for the first time. The unique hetero-junction structure of Ag/AgCl@ZIF-8 greatly enhanced its photocatalytic activity. Selecting RhB as a model pollutant, 98% of RhB can be degraded after 16 min under solar radiation. The relationship between the photocatalytic activity and the structure of Ag/AgCl@ZIF-8 hybrid materials was discussed and the possible reaction mechanism was proposed. The high photocatalytic activity of the hybrid material under solar radiation revealed its great application potential in directly harvesting solar energy to solve the environmental pollution issues.
研究领域:
材料科学
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光催化
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环境科学
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纳米材料
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能源化学
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2020
·Vol. 27
·期 11
·11990-12000
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IF 3.056
Cui Yanping,Thathsarani Nimesha,Peng Liang,Gao Ya,Lei Lidan,Zhou Zhengwei,Liang Lili,Shi Xiaoyan
Innovative paramagnetic one-dimensional (1-D) core-shell Fe-Ag@AgCl visible light-driven photocatalysts are synthesized through a template-assisted electrodeposition method trailed by FeCl 3 in-situ oxidation. The metallic nature of Fe-Ag@AgCl is confirmed through scanning electron microscopy (SEM) and crystal nature through X-ray diffraction (XRD). The controllable diameter of Fe-Ag is obtained through the selection of hollow size of the polycarbonate (PC) template. Electron impedance spectroscopy (EIS) confirms through the introduction of Fe to the Ag core that has prolonged the recombination of electron and hole. Escherichia coli ( E. coli ) are employed as the target bacteria to evaluate the photocatalytic disinfection performances. A total of 1.30 mg of Fe-Ag@AgCl is proved to be able to completely inactivate 10 7 CFU (colony forming units)/mL after 120 min of visible light irradiation. The transition electron microscopy (TEM) confirms the stability of the material after the photo reaction. As Fe-Ag@AgCl possesses magnetic properties, the material is recovered through the application of an external magnetic field. SEM images and results of 3D emission extraction matrix (EEM) depict that the bacteria cell death is caused by membrane permeability changes caused by the reduction of membrane associated proteins.
研究领域:
环境科学
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材料科学
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微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）