Desalination and Water Treatment
·
2024
·
IF 1
Songhao Luo,Zhigang Yi,Min Cheng,Biao Song,Chengyun Zhou,Wenjun Wang,Zhifeng Liu
It is challenging to produce soft polymer materials with high surface area and nanoscale morphology that can be used for continuous flow water treatment in a processable, versatile, and stable manner. Here, we manufactured a processable Ag@CMPA-bph and used it to treat pollutants in wastewater at continuous flow conditions. The aerogel was prepared by a simple reduction method of CMP matrix and Ag metal precursors. Thermogravimetric analysis and electron microscopy showed that the aerogel had excellent thermal stability and distribution of fine Ag nanoparticles. The synthesized aerogel inherits the controllable properties of the CMP matrix and can be tailored to a specific shape for installation into the water treatment unit. In continuous flow conditions, this aerogel shows excellent catalytic activity to efficiently treat the combined pollutant containing p- nitrophenol and methyl orange ( p- NP&MO), which can reach a removal rate of more than 99 % at the flow rate of 0.6 L h -1 . Furthermore, the Ag@CMPA-bph can also be used for continuous flow treatment of pollutants in river water sample and shows robust anti-pollution load capacity and catalytic activity.
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Siying Li,Rong Zhang,Junlan Xie,Dur E. Sameen,Saeed Ahmed,Jianwu Dai,Wen Qin,Suqing Li,Yaowen Liu
In this study, poly(vinyl alcohol) (PVA) membranes containing Ag nanoparticles (AgNPs) were prepared by electrospinning and grafted copolymerization with 3,3′,4,4′-benzophenone tetracarboxylic acid (BPTA) to provide better mechanical properties, lower water vapor transmittance, and higher antibacterial activity (against Staphylococcus aureus and Escherichia coli ) than the PVA/AgNPs membrane. The PVA/AgNPs/BPTA membrane showed higher antibacterial activity than the other membranes, and it produced inhibition zones with diameters of 18.12 ± 0.08 and 16.41 ± 0.05 mm against S. aureus and E. coli , respectively. The PVA/AgNPs/BPTA membrane was found to be capable of promoting reactive oxygen species (ROS) formation under both light and dark conditions. Cycling experiments performed following ROS quenching showed that the best-performing composite membrane retained >70% of its original OH⋅ radical and H 2 O 2 charging capacity after seven cycles. In the filtration test, the electrospun nanofibrous membranes showed high filtration efficiencies of 99.98% for sodium chloride (NaCl). In addition, these membranes maintained a relatively low pressure drop of 168 Pa with a basis weight of 2.1 g m −2 . Thus, the PVA/AgNPs/BPTA membrane was concluded to be a promising medical protective material offering the benefits of structural stability and reusability.
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2022
·
IF 5.999
Huiling Ye,Yongguan Liu,Wenqiang Xie,Xing Lin,Haibo Pan
An electrochemical sensor based on loading molecularly imprinted polymers (MIP) on the material surface can improve the specificity towards the object. In this work, a T-shaped PbTiO 3 with a high active-exposed (110) facet was prepared by a hydrothermal process. Then, Ag nanoparticles (Ag NPs) modified T-shaped PbTiO 3 was obtained by in-situ photocatalytic reduced method under UV irradiation , where a hetero-junction was formed with a well lattice matching between the (111) facet of Ag 0 and the (110) facet of PbTiO 3 . A MIPs modified by Ag nanoparticles (NPs)/PbTiO 3 (MAP) electrodes was prepared via electro polymerization process by o-Phenylenediamine (o-PD) in the presence of the template molecule, bovine hemoglobin (BHb), i.e., the detected molecule. The response peak current and concentration of BHb is demonstrated with a good linear relationship in the range of 0.00294–0.41 nM (R 2 =0.98), and the detection limit at 0.23 pM (S/N = 3). A heterojunction between Ag NPs and high- active facet of PbTiO 3 is beneficial to oxidizing electroactive material ([Fe (CN) 6 ] 3-/4- ), generating more BHb-imprinting cavities on the modified electrode and improving the sensitivity of sensor. The electrochemical sensor is with a simple, stable structure and high sensitivity to BHb detection. Furthermore, the sensor was successfully applied to detect BHb in the bovine serum samples.
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2019
·
IF 3.206
Yuxiao Yang,Min Jiang,Kaihang Cao,Mei Wu,Chulei Zhao,Hongling Li,Chenglin Hong
An electrochemical immunosensor for quantitation of carcinoembryonic antigen (CEA) based on Au-Ag/ [email protected] nanocomposites for dual signal amplification strategy was designed. Polydopamine-coated Ag/graphene hybrids were synthesized by one-step reduction and functionalization, and the dopamine was introduced to replace some reducing agents that are harmful to organisms. Silver nanoparticles modified on the electrodes produced sensitive electrochemical redox peaks. When different amounts of protein (antigen, antibody, bovine serum protein, etc.) were adsorbed on the surface of nano-silver, the surface of nano-silver was covered. The electrochemical redox peak of silver particles decreased due to the change of the effective area of bare silver particles which could react with electrodes. In addition, CEA-antibody (anti-CEA) was immobilized into a biocompatible nanocomposite of Au nanoparticles as a conductive matrix, and CEA-antibody (anti-CEA) was combined with Ag/ [email protected] to form a dual signal amplifying element. Under optimal condition, the linear relationship was obtained from 0.001 ng mL −1 to 80 ng mL −1 between current signal and CEA concentration with a detection limit of 0.286 pg mL −1 (signal-to-noise ratio is 3). The label-free electrochemical immunosensor has been successfully applied to human serum detection due to good selectivity , stability and reproducibility.
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DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2021
·
IF 7.664
Qiang Gao,Jianbin Qin,Borui Guo,Xun Fan,Fangping Wang,Yu Zhang,Ronglin Xiao,Fei Huang,Xuetao Shi,Guangcheng Zhang
In order to prepare the high-performance electromagnetic interference (EMI) shielding materials to cope with the increasingly serious electromagnetic (EM) radiation pollution situation, in this work, epoxy/Ag nanowire/thermal annealed graphene aerogel composites (EP/AgNW/TAGA) with three-dimensional (3D) bicontinuous conductive skeleton are prepared through a vacuum-assisted impregnation method. By introducing the one-dimensional (1D) AgNW on two-dimensional (2D) graphene and welding the AgNW during hydrothermal reduction and thermal annealing process, the electrical conductivity of EP/AgNW/TAGA are greatly enhanced from 26.5 S/m to the highest value of 595.7 S/m. Besides, the EP/AgNW/TAGA achieve the highest EMI shielding effectiveness (EMI SE) value of 84.01 dB in X-band and absorption-dominate shielding mechanism. Moreover, the compressive strength of composites reached 173.54 MPa, which shows the great application value as high-performance EMI shielding material in fields like construction, aerospace and electronics field.
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2017
·
IF 2.536
Yu-Feng Zhu,Yong-Sheng Wang,Bin Zhou,Yan-Qin Huang,Xue-Jiao Li,Si-Han Chen,Xiao-Feng Wang,Xian Tang
We for the first time confirmed that the low concentrations of Ag(I) could induce a silver specific aptamer probe (SAP) from a random coil sequence form to G-quadruplex structure. Thereby, a novel highly sensitive fluorescence strategy for silver(I) assay was established. The designed multifunctional SAP could act as a recognition element for Ag(I) and a signal reporter. The use of such a SAP can ultrasensitively and selectively detect Ag(I), giving a detection limit down to 0.64 nM. This is much lower than those reported by related literatures. This strategy has been applied successfully for the detection of Ag(I) in real samples, further proving its reliability. Taken together, the designed SAP is not only a useful recognition and signal probe for silver, but also gives a platform to study the interaction of monovalent cations with DNA .
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DOI
PubMed
高影响因子
NPG Asia Materials
·
2016
·Vol. 8
·期 12
·e335
·
IF 8.772
Dong Jiang Xue,Gao Zhong Feng,Zhang Ying,Li Bang Lin,Zhang Wei,Lei Jing Lei,Li Nian Bing,Luo Hong Qun
Water-soluble fluorescent Ag nanoclusters (Ag NCs) with distinct pH-switchable agglomeration and spectral signal responses are prepared using a facile etching method. Increased and decreased pH cause the Ag NCs to switch between agglomeration and dispersion, accompanied by decreases in and recoveries of fluorescence intensity and absorbance. The pH switchable behavior of the Ag NCs is attributed to carboxyl groups on the nanocluster surface that are rich in the citrate and amido functional groups of ligands (glutathione), creating an easily formed, weak molecular interaction among Ag NCs (for example, hydrogen bonding) and maintaining a balance in the colloidal solution, whereas a change in pH will disrupt the balance, leading to the reversible agglomeration of Ag NCs and the switchable spectral signal response. In addition, because urea and glucose can change the pH of a solution by producing NH 3 and gluconic acid in enzyme-catalyzed reactions, the pH-switchable behavior of the Ag NCs is used to develop them as an optical probe to establish a regenerated biosensing platform for the sensitive and selective detection of urea and glucose, and the test results are satisfactory.
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DOI
高影响因子
Acta Biomaterialia
·
2020
·
IF 7.242
Jianglong Yan,Dandan Xia,Wenhao Zhou,Yangyang Li,Pan Xiong,Qiyao Li,Pei Wang,Ming Li,Yufeng Zheng,Yan Cheng
Polyetheretherketone has been widely used for bone defect repair, whereas failures may happen due to implant loosening and infection. Thus, PEEK implant with multi-function (osteogenesis, angiogenesis , and bacteria-killing) is essential to solve this problem. Herein, copper oxide microspheres (µCuO) decorated with silver nanoparticles (nAg) were constructed on porous PEEK surface via silk fibroin . In vitro studies highlighted the pH controlled release ability of this coating. It liberated a high dose of Cu 2+ and Ag + at low pH environment (pH 5.0), leading to 99.99% killing of planktonic bacteria and complete eradication of sessile bacteria, avoiding biofilm formation. Under physiological environment (pH 7.4), a lower amount of leaked metal ions induced promoted ALP production, collagen secretion, and calcium deposition, as well as NO production, which indicated potentiated osteogenesis and angiogenesis. In vivo results displayed the highest new bone volume around, and the appearance of new bone inside porous structure of, PEEK implant with this coating in rabbit tibia, signified the abilities of this coating to promote bone regeneration and osseointegration . Our study established solid support for implants with this coating to be a successful bone defect repair solution. Statement of Significance In this study, CuO/Ag micro/nano particles were incorporated into the porous surface of PEEK through polydopamine and silk fibroin layers. The design of this coating conferred pH-controlled release behavior to Cu 2+ and Ag + . High dose of metal ions were released at pH 5.0, which presented synergistic antibacterial ability and killed 99.99% of planktonic bacteria. Low concentration of metal ions were controlled by this coating at physiological environment, which potentiated osteodifferentiation of Ad-MSC in vitro and led to complete integration of implant with bone tissue in vivo .
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DOI
PubMed
高影响因子
TALANTA
·
2012
·
IF 3.794
Shenfei Zong,Zhuyuan Wang,Jing Yang,Chunlei Wang,Shuhong Xu,Yiping Cui
We report a dual mode cancer cell targeting probe based on CdTe quantum dots (QDs) conjugated, silica coated [email protected] core–shell nanorods ( [email protected] NRs), which can generate both surface enhanced Raman scattering (SERS) and fluorescence signals. In such a probe, folic acid (FA) is used as a targeting ligand for folate receptors (FRs) overexpressed cancer cells. To synthesize the probe, [email protected] NRs were first prepared to serve as the SERS substrates by coating an Ag shell on the gold nanorods. Then the [email protected] NRs were labeled with 4-mercaptobenzoic acid (4MBA) to generate SERS signals, followed by being coated with a silica shell through a modified Stöber method. Finally, CdTe QDs and FA were conjugated to the silica coated [email protected] NRs by the carbodiimide chemistry to yield fluorescence and the targeting ability, respectively. To validate the targeting capability of the probe, in vitro experiments were conducted, using HeLa cells with overexpressed FRs as the model target cells and MRC-5 cells with a low folate receptor expression level as the negative control. Both the fluorescence imaging and the SERS mapping results confirmed that the proposed probe can be used as an efficient cancer cell targeting agent. This kind of multifunctional probe has great potential in the diagnosis and therapeutics of cancerous diseases due to its specific targeting and multiplex imaging abilities, especially in the simultaneous tracking of multiple components in a hybrid bio-system.
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DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Jianjun Du,Tao Zhu,Quanyong Gu,Wenbing Cao,Jiangli Fan,Xiaojun Peng
Green fluorescent protein (GFP) becomes one of the most important imaging tools in biology and biomedicine. To simplify usage, expand the application and avoid complicated operations, a kind of artificial fluorescent protein (AFP) is inspired and fabricated by lighting up human serum albumin (HSA) with loading microenvironment-sensitive fluorescent dye DMAR , which could be applied in HSA assay in human urine and serum samples as a physiological indicator of diagnosis in clinical. Besides, the AFP, DMAR /HSA, could act as a nanosensor for Ag + sensing with good selectivity by a new relay recognition strategy.
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Zixia Tang,Hong Tao,Xiao Wang,Lu Chen,Chi Song,Guanhong Lu,Xiaofeng Xie,Jing Sun
The implantation of metal nanoparticles (MNPs) into metal–organic framework (MOF) hosts is a promising means to prepare high-performance photocatalysts for the degradation of gas pollutants. However, the uniform encapsulation of MNPs in MOFs is still challenging. Herein, a facile “quasi-in situ” encapsulation method is proposed by utilizing the spatial confinement effect of the colloidal network formed during the synthesis of the MIL-100(Fe) monolith [noted as m-MIL-100(Fe)]. Highly dispersed Ag NPs with an average diameter of ∼2 nm are encapsulated in the MIL-100(Fe) monolith to form a unique “watermelon-seed” structure, which ensures the large contact area between the two components and protects Ag NPs from being oxidized. The fast charge transfer between m-MIL-100(Fe) and Ag NPs enables the spatial separation of electron–hole pairs and promotes the generation of oxidative radicals. Compared with pristine m-MIL-100(Fe), the 0.2 wt % Ag@m-MIL-100(Fe) composite shows obviously enhanced photodegradation efficiencies for flowing o-xylene under both xenon (∼97%) and visible light (∼80.0%) with high stability. This work not only provides a promising Ag@m-MIL-100(Fe) material for eliminating air pollutants but also gives a versatile means for the design and synthesis of nanoparticles@MOFs composites with desired performance.
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DOI
PubMed
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 22
·13193-13200
·
IF 3.361
Nannan Zhang,Yuxi Meng,Yuxue Ning,Andrew E. H. Wheatley,Fang Chai
The enormous and urgent need to explore cost-effective catalysts with high efficiency has always been at the forefront of environmental protection and remediation research. This work develops a novel strategy for the fabrication of reusable CuO-based non-noble metal nanomaterials as high-efficiency catalysts. We report a facile and eco-friendly synthesis of CuO hexapods and CuO–Ag composite using uric acid as a reductant and protectant. Both exhibited high catalytic activity in the hydrogenation of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) by sodium borohydride (NaBH4), with the CuO–Ag composite showing superior catalytic performance. Notably, the highest turnover frequency of CuO–Ag reached 7.97 × 10−2 s−1, which was much higher than numerous noble-metal nanomaterials. In addition, CuO hexapods and CuO–Ag composite were also shown to act as highly efficient and recyclable catalysts in the degeneration of 4-NP. Both CuO hexapods and the CuO–Ag composite exhibited outstanding catalytic durability, with no significant loss of activity over more than 10 cycles in the hydrogenation of 4-NP.
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DOI
PubMed
高影响因子
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