Journal of Physical Chemistry C
·
2023
·
IF 3.7
Huiling Zhu,Cuixia Hao,Xin Li,Yao Qi,Xuesong Zhu,Yucheng Miao,Rui Liu,Jianxu Ding
Black phase CsPbI3 quantum dots (QDs) have garnered significant research interest due to their remarkable properties in optoelectronic applications. However, their inherent instability and low phase stability often lead to an undesired transformation into an orthorhombic yellow phase. In this study, we propose an innovative approach to synthesize Ag+ doped CsPbI3 QDs in a nonvacuum environment. The theoretical calculations and experimental results demonstrate that Ag+ doping substantially increases the formation energy and Goldschmidt tolerance factor, resulting in an enhanced thermodynamic stability and photoluminescence quantum yield (PLQY). The resulting Ag+ doped CsPbI3 QDs exhibit an impressive PLQY of up to 97% and maintain their black phase for over 60 days. This novel nonvacuum synthesis approach holds great potential for producing high-quality all-inorganic perovskite CsPbX3 QDs. To demonstrate the practical applications, we fabricate a white light-emitting diode (WLED) using the Ag+ doped CsPbI3 QDs, achieving Commission Internationale de I’Eclairage (CIE) color coordinates of (0.36, 0.26). These findings highlight the broad prospects of CsPbI3 QDs in lighting and display technologies.
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2023
·Vol. 8
·期 34
·e202302723
·
IF 2.1
Jingnan Liu,Haoran Jia,Jiawei Guo,Wen Zhang
Graphical Cu 2 O−Ag nanocomposites were prepared and can be used with facile method for the electrochemical quantification of catechol. The rational surface configuration of Cu 2 O−Ag showed synergistic effects that improved the adsorption of catechol, facilitating interfacial electron transfer. Highly sensitive and selective electrochemical sensors are essential for human health, especially for monitoring the state of environmental pollutant content. Here, Cu 2 O nanocubes uniformly decorated with Ag nanoparticles were synthesized by a tractable wet-chemical method. The electrochemical studies confirm that the Cu 2 O-Ag-16 composite shows increased electrochemical activity for catechol determination compared with either the bare Cu 2 O or the other two as-proposed Cu 2 O−Ag catalysts (Cu 2 O−Ag-8, Cu 2 O−Ag-24). More specifically, the Cu 2 O−Ag-16 presents excellent electrochemical responses towards catechol detection over wide linear ranges of 0.05 μM – 1 mM and 1 mM – 5 mM, with high sensitivity and low detection limits (50 nM). Furthermore, the as-proposed sensor also displays good reproducibility, with a relative standard deviation of 2.3 % (n=3). Satisfactory recoveries in the range of 98.3 % to 101.2 % or 98 % to 100.7 % for lake water and/or tap water indicate the reliability of the sensor for catechol detection in practical applications. Constructing such composite structures to manipulate the local charge distribution for outstanding electrochemical sensing properties would provide us with an innovative strategy to explore other highly efficient electrode materials.
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2016
·Vol. 9
·期 1
·163-169
·
IF 1.915
Qinglin Sheng,Yu Shen,Jian Zhang,Jianbin Zheng
In this work, attractive core–shell structured nanomaterials consisting of Ni doped Ag@C were synthesized. Further, a hydrogen peroxide (H2O2) sensor was fabricated by modifying the Ni doped Ag@C (Ni/Ag@C) nanocomposites onto the surface of a glassy carbon electrode (GCE). The composition and morphology of the Ni/Ag@C nanocomposites were characterized by scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy and Fourier transform infrared spectroscopy. The results indicated that the nanocomposites were synthesized successfully and showed similar grain sizes and favorable dispersity. The electrochemical and electrocatalytic properties of the Ni/Ag@C nanocomposites were studied by cyclic voltammetry. An electrochemical investigation showed that the Ni/Ag@C nanocomposite modified GCE exhibited a good electrocatalytic ability for H2O2 reduction and it was used for the determination of H2O2. The linear range for H2O2 determination was from 0.03 mM to 17.0 mM with a detection limit of 0.01 mM (S/N = 3). The sensitivity was 22.94 μA mM−1 cm−2. It is expected that the application of the Ni/Ag@C nanocomposites could be extended to the construction of other sensors and applications in various sensing fields.
✓ 已验证
产品关联
DOI
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 3.978
Jingjing Zhang,Feng Qu,Taobo Liang,Sidi Lv,Wen Li,Qixiu You,Bolu Chen,Hengyi Xu
Pseudomonas aeruginosa is one of the most commonly isolated nosocomial pathogens and is responsible for approximately 10 % of all hospital-acquired infections. P. aeruginosa is difficult to treat with known antibiotics due to its increasing antibiotic resistance. In our study, Ag NPs coated with ε-polylysine (ε-PL) and polyethyleneimine (PEI) were synthesized. These materials showed strong anti- P. aeruginosa capacity at an low concentration (IC50: 7.284 μg/mL). In addition, three drug-resistant clinical strains and biofilm formation were inhibited by ε-PL/PEI-coated Ag NPs (MBIC: 15.63 μg/mL). We further studied the antibacterial mechanism of Ag NPs on different levels and found that a) the amount of reactive oxygen species (ROS) increased, b) the expression of oxidative stress-related genes were up-regulated, c) the activity of total superoxide dismutase decreased, and d) the inhibitory rate is increased on P. aeruginosa cells. These antibacterial effects were dependent on an increasing concentration of Ag NPs but were neutralized by the ROS scavenger N-acetyl-L-cysteine. Therefore, we suggested that oxidative stress induced by ROS is the primary antibacterial mechanism of synthesized Ag NPs.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Jiye Qiu,Xiangwei Wang,Yong Ma,Zhiwei Yu,Tingxi Li
Stretchable transparent conductive films (STCFs) show great potential for application in flexible electronics. Herein, a facile and scalable method to prepare STCFs based on Ag nanowires (AgNWs) for flexible circuits and tension sensors is introduced for the first time. AgNWs were embedded in a substrate, and its bonding property with the substrate was tested using 3M Scotch tape. The transmittance of STCFs with a sheet resistance of 20 Ω/sq was found to be more than 85% at a wavelength of 550 nm. The STCFs with less than 20 Ω/sq almost stayed constant even after twisting and bending for 10,000 cycles and stretching for 1000 cycles, respectively. Then, the current signal variation was studied using an electrochemical workstation with STCFs stretched periodically. Finally, we fabricated transparent flexible circuits for light-emitting diodes (LEDs) and tension sensors for knuckles to detect their real-time motion. The LEDs worked well in the circuits, and the sensor quickly responded to knuckle bending, which demonstrated that STCFs would have good prospects in flexible electronics.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 22
·26465-26479
·
IF 2.478
Zhu Wanrong,Song Jimei,Wang Xule,Lu Yun,Hu Gang,Yang Jie
A series of Ag/AgBr/BiOBr photocatalysts with different weight contents of Ag/AgBr were successfully constructed via a simple precipitation method in 80 °C water bath. Photocatalysts were characterized by XRD, XPS, SEM, TEM, N 2 Adsorption-Desorption (BET), and UV–Vis Diffuse Reflectance Spectroscopy (DRS). Compared with BiOBr and Ag/AgBr, all the composite photocatalysts show the prominent photocatalytic activity for the degradation of tetracycline (TC). Especially, 1:5Ag/AgBr/BiOBr (20%) has the highest reaction rate constant (kapp = 0.20 min −1 ). Moreover, according to the results of radical scavengers runs, ·OH and h + acted as the main reactive species in the degradation process. Based on above, a possible photocatalytic mechanism for organics degradation over Ag/AgBr/BiOBr was proposed. Interestingly, the redox cycle between O 2 /·O 2 − and Br − /Br 0 assisted with the surface plasmon resonance (SPR) effect of silver dramatically promotes the separation and transfer of electron–hole pairs, and improves the photocatalytic activity of the as-obtained composite samples.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PAPERS
·
2021
·Vol. 75
·期 7
·3679-3693
·
IF 2.097
Cheshari Emily C.,Ren Xiaohui,Li Xin
Carbamate pesticides are popularly used in agriculture due to their relatively low toxicity and their more degradable nature compared to organophosphates. Resultant residues pose a threat to human and animal health, aquatic systems and wildlife. Carbaryl and thiodicarb are used to control pests in a variety of agricultural crops. Monitoring the level of these pesticides in the environment is crucial in ensuring environmental safety. Multi-template imprinted polymers combined with surface enhanced Raman spectroscopy (SERS) are attractive for sensitive and effective multiple analyte detection for application in pesticide residue studies in environmental matrices. A core–shell Ag-dual template molecularly imprinted polymer (MIP) composite was synthesized and evaluated in this study. Computational design was used to study intermolecular interactions in the pre-polymerization mixture between methylacryamide (MAM) (functional monomer) and the templates carbaryl (CBL) and thiodicarb (TDC). The interaction between the computer simulated template-functional monomer complexes was evaluated by examining the hydrogen bonds to provide insights on the observed binding performance of the dual imprinted polymer. The MIP was then synthesized and its binding properties towards CBL and TDC investigated experimentally. More so, we compared the performance of the mono-template MIP materials and the dual-template MIP material in detection of the templates. The experimental results corroborate the computer simulation results and reveal that CBL has higher adsorption capacity as supported by higher number of hydrogen bonds in the template monomer complex. Therefore, the study presents a cost-effective approach that utilizes a dual-template imprinted polymer for detection of carbamate pesticide residues.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2021
·
IF 5.467
Atian Xie,Jiuyun Cui,Jin Yang,Chunxiang Li,Yi Wang,Jiangdong Dai
The effective treatment of oily wastewater is of great significance for the protection of the ecological environment and human health. Aiming to prepare a membrane with excellent antifouling properties, a new active antifouling carbon cloth@Ni-Co LDH/Ag (CC@LDH/Ag) membrane was reported here via in situ hydrothermal growth and followed photo-deposition methods. The effects of Ag deposition on self-cleaning ability and surface wettability of CC@LDH/Ag membrane were studied. The experimental results showed CC@LDH/Ag membrane is superhydrophilic/underwater superoleophobic, and exhibited high separation efficiency (>98.6%) and high flux (6551–22,050 L m −2 h −1 ) for different kinds of oil/water mixtures. Moreover, CC@LDH/Ag membrane also displayed excellent environmental and mechanical durability. Good self-cleaning ability enabled CC@LDH/Ag membrane to be separated at least 30 times, and still maintained high separation performance. The self-cleaning CC@LDH/Ag membrane may hold great application prospects in oily wastewater remediation.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Yingjie Gao,Qi Zhao,Yunhe Li,Yuanqing Li,Jianfeng Gou,Xiuwen Cheng
Advanced Oxidation Processes (AOPs) play a critical role in the elimination of antibiotics, in which it is essential to explore an environmentally friendly, cheap and effective catalyst. In this study, Ag 2 O-g/eggshell catalyst had been synthesized in a simple strategy, combining with peroxymonosulfate (PMS) to simultaneous remove sulfamethoxazole (SMX). Then, physicochemical properties of catalyst were investigated by series of techniques. Results indicated the Ag species was featured with a spherical-like structure and homogeneously distributed on the surface of eggshell. In addition, Ag 2 O-Ag/eggshell exhibited high degradation efficiency of SMX by activation of PMS (94.6%) under the optimized conditions of 0.1 g•L −1 Ag 2 O-Ag/eggshell, 0.16 mM PMS, 10 mg•L −1 SMX and initial pH 6.42. Moreover, several parameters such as the dosage of catalyst, PMS and the effect of pH, co-existing anions, humic acid (HA) and water matrices on SMX degradation were systematically studied. Besides, scavenging experiments were conducted to distinguish the active radicals. Furthermore, to improve the reusability of powder Ag 2 O-Ag/eggshell, corresponding Microporous Filter Membrane had been synthesized. Subsequently, possible reaction mechanism was proposed. Consequently, these results revealed that the waste eggshell was considered as a promising supporting material for the metal catalyst for the catalytic degradation of antibiotics in water.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2020
·Vol. 34
·期 12
·e5972
·
IF 3.14
Huihui Song,Na Wang,Xiatong Shi,Hao Meng,Yide Han,Junbiao Wu,Junli Xu,Yan Xu,Ting Sun,Xia Zhang
Probing into the new heterostructure based on metal–organic frameworks (MOFs) and optimizing their photocatalytic efficiency under solar energy irradiation are one of hot topics in extending applications of MOFs in photocatalytic technology. Inspired by the excellent visible-light responses and photocatalytic activities of inorganic silver salts, in this work, we focused on the construction of hybrid photocatalysts involving Ag-MOF and silver cyanamide (Ag 2 NCN). Two opposite in situ synthesis routes were adopted, which are hydrothermally producing Ag-MOF in the presence of Ag 2 NCN (route A) or precipitating Ag 2 NCN in the existence of Ag-MOF (route B), and the mass ratio of Ag 2 NCN vs. Ag-MOF was optimized. The morphology and structure character show that the synthetic routes have no obvious influences on the crystal structure, but change the morphology and size of final hybrid photocatalysts. The photocatalytic degradation of Rhodamine B under simulated solar energy has been tested to evaluate the photocatalytic activities for resulting hybrids. Compared to single Ag-MOF and Ag 2 NCN, the enhanced photocatalytic rates are represented by the hybrids. The electrochemical analyses and the active species trapping experiments were conducted to clarify the photocatalytic mechanism for resulting hybrids. The good recycling photocatalytic results indicate the prospect applications of Ag-MOF based hybrid photocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2020
·Vol. 22
·期 10
·1-12
·
IF 2.132
Niu Zhiqiang,Liu Hongmei,Chen Ying,Gu Chenjie,Zhao Ziqi,Jiang Tao
Surface-enhanced Raman scattering (SERS) has been considered a high sensitivity, specificity, and ultra-fast analytical technique in molecular fingerprint recognition. Herein, a kind of sandwich Au/“star-like” mesoporous SiO 2 /Ag (Au/MSiO 2 /Ag) hybrid nanostructure was developed by implementing the electrostatic adsorption and magnetron sputtering technology for SERS application. In the experiment, the decoration density of the MSiO 2 /Ag nanostructure was conveniently adjusted through tuning the washing times of the silicon wafer in ethanol. The prepared substrate with the optimal geometry structure exhibited an enhancement factor (EF) of 9.2 × 10 5 , a limit of detection (LOD) of 5 × 10 −5 M, and a low relative standard deviation value of 5.02%. In the end, the obtained hybrid SERS substrate was used to detect nitrofurazone and an excellent LOD of 1 ppm was achieved. Overall, our novel sandwich Au/MSiO 2 /Ag hybrid SERS substrate provides a rapid and accurate way of monitoring ultra-low trace antibiotics, which can significantly promote food safety.
Graphical abstract
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2021
·
IF 3.383
Thanakorn Yeamsuksawat,Hui Zhao,Jun Liang
This work aimed to synthesize Fe 3 O 4 @Chitosan@Ag nanoparticles by employing the suspension technique with a crosslinking agent, producing the Ag nanoparticles (AgNPs) using glucose as a reducing agent and applying them to the surface of Fe3O4@Chitosan. The Fe 3 O 4 @Chitosan@Ag nanoparticles were characterised by X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR) to determine the existence of chitosan and Ag nanoparticles on the surface of the Fe 3 O 4 . The thermal stability, morphology, and magnetic behaviour were studied by comparing the results among Fe 3 O 4 , Fe 3 O 4 @Chitosan, and Fe 3 O 4 @Chitosan@Ag with thermogravimetric analyses (TGA), transmission electron microscopy (TEM), and a vibrating sample magnetometer (VSM), respectively. Moreover, the comparison of antimicrobial activity between Fe 3 O 4 @Chitosan and Fe 3 O 4 @Chitosan@Ag nanoparticles was conducted by the colony count method. Based on the results, both types of nanoparticles can inhibit the growth of microbes. However, the Fe 3 O 4 @Chitosan@Ag showed superior results of at least 99.5 % prevention of the growth of microorganisms. These developed antimicrobial nanoparticles could be the potential antimicrobial agent or additives in various medical, biological, food packaging, and textile applications.
✓ 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）