Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Chen Shao,Jian Zhang,Yuqing Liu,Yuting Jiang,Yanping Jia,Guomin Li,Zhong Sun
The presence of antibiotics such as Tetracycline (TC) in the water environment poses new challenges to traditional water treatment technologies . Simple and clean electrocatalytic technology has been widely used in the degradation of antibiotic-based wastewater. In this study, agarose (AG) was loaded onto ITO using an impregnation method, and Pd was deposited onto the AG/ITO electrode by electrodeposition , the Pd/AG/ITO composite electrode was prepared. The electrode was then observed and analyzed using SEM , XRD , FT-IR, and XPS . The optimal conditions for the electrocatalytic reaction were explored as follows: PdCl 2 concentration of 0.20 mmol/L, PdCl 2 deposition current of 3 mA, deposition time of 10 min, and degradation current of 8 mA. Under these optimal working conditions, the Pd/AG/ITO composite electrode achieved a degradation efficiency of 85.21% within 120 min. Through five replications, the degradation efficiency of the electrodes decreased by less than 3.50%, which indicated its good reusability and stability. Based on the generation of active substances during degradation and the analysis of LC-MS, potential degradation products , and degradation pathways were deduced, and it was proposed that the degradation of TC was completed by a synchronous redox reaction co-led by·OH and H*. Toxicity analysis of TC and its degradation products was performed using ECOSAR software. This study will promise to provide an effective method of degrading TC wastewater.
✓ 已验证
产品关联
DOI
高影响因子
OPTICS EXPRESS
·
2022
·Vol. 30
·期 21
·38613-38629
·
IF 3.833
Wenzhi Yuan,Yanjun Wu,Zhibin Zhang,Guochao Shi,Wei Han,Kuihua Li,Jungai Gu,Congzhe Chen,Jialin Ge,Wenying Zhou,Jiahao Cui,Mingli Wang,Mingli Wang
The combination of new noble metal nanomaterials and surface enhanced Raman scattering (SERS) technology has become a new strategy to solve the problem of low sensitivity in the detection of traditional Chinese medicine. In this work, taking natural cicada wing (C.w.) as a template, by optimizing the magnetron sputtering experimental parameters for the growth of Ag nanoparticles (NPs) on vanadium-titanium (V-Ti) nanorods, the nanogaps between the nanorods were effectively regulated and the Raman signal intensity of the Ag15/V-Ti20/C.w. substrate was improved. The proposed homogeneous nanostructure exhibited high SERS activity through the synergistic effect of the electromagnetic enhancement mechanism at the nanogaps between the Ag NPs modified V-Ti nanorods. The analytical enhancement factor (AEF) value was as high as 1.819 × 108, and the limit of detection (LOD) was 1 × 10−11 M for R6G. The large-scale distribution of regular electromagnetic enhancement “hot spots” ensured the good reproducibility with the relative standard deviation (RSD) value less than 7.31%. More importantly, the active compound of Artemisinin corresponded the pharmacological effect of Artemisia annua was screened out by SERS technology, and achieved a LOD of 0.01 mg/l. This reliable preparation technology was practically applicable to produce SERS-active substrates in detection of pharmacodynamic substance in traditional Chinese medicine.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Jialong Li,Fanming Meng,Hao Wu,Han Zhang
The construction of Z-scheme heterostructures is one of the most effective strategies to improve photocatalytic efficiency. In this study, Ag + doped ZnIn 2 S 4 /Bi 2 S 3 composite nanosphere materials with different mass fractions of Bi 2 S 3 were successfully synthesized by the solvothermal method. Systematic studies showed that the construction of heterogeneous structures and Ag + doping could extend the optical absorption edge and provide more active sites. More importantly, it was shown by photoelectrochemical and PL spectroscopy tests that Ag: ZnIn 2 S 4 /Bi 2 S 3 has strong visible light absorption and photocarrier transfer capability. In addition, the Z-scheme mechanism of Ag: ZnIn 2 S 4 /Bi 2 S 3 was investigated by electron spin response (ESR) and active substance capture experiments, which confirmed that both superoxide radicals( O − 2 ) and hydroxyl radicals( OH) were involved in the photocatalytic reaction. The results showed that the optimized Ag: ZnIn 2 S 4 /2.5%Bi 2 S 3 degraded TC by 89.7%, 1.87 times higher than the original ZnIn 2 S 4 . This work provides a promising method for the construction of Z-scheme heterojunctions based on ZnIn 2 S 4 .
✓ 已验证
产品关联
DOI
高影响因子
Advanced Electronic Materials
·
2022
·Vol. 8
·期 11
·2200577
·
IF 7.633
Nan Xin,Guihua Tang,Yifei Li,Hao Shen,Yinan Nie,Min Zhang,Xin Zhao
Single crystal tin selenide (SnSe) has a recorded high thermoelectric figure of merit (ZT) value of 2.6 at 923 K, but it is easy to form mechanical cracks and difficult to apply in thermoelectric conversion devices. Polycrystalline SnSe has better mechanical properties but inferior ZT values, which needs further optimization for applications. This work aims at enhancing the thermoelectric performance of polycrystalline SnSe through synergistic optimization of sliver (Ag) and aluminum (Al) co-doping with the hydrogen reduction. The effects of Ag and Al doping on electronic transport properties are systematically investigated by density functional theory calculation and experimental measurement. Compared with pristine SnSe, Ag doping can effectively increase the hole concentration to 1.58 × 10 19 cm −3 and improve the conductivity. Results also indicate that using Al dopant may slightly decrease the hole concentration but reduce the thermal excitation temperature, and introduce point defects reducing the lattice thermal conductivity through scattering phonons. In addition, the hydrogen reduction of sample powders before synthesis can effectively remove Sn oxides and reduce lattice thermal conductivity. At last, a state-of-the-art maximum ZT value of 1.69 at 823 K is obtained in Ag 0.01 Al 0.01 Sn 0.98 Se. This study provides a theoretical basis and technical guidance for designing high-performance polycrystalline SnSe.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Jian Yang,Lei Li,Fan Fu,Hao Xu,Kang Da,Shaobo Cao,Wenting Chen,Lei Yang,Ximei Fan
As a typical aromatic volatile organic compounds (VOCs), toluene is difficult to be decomposed by photocatalysts under visible-light driven. Herein, the Ag/AgCl/Bi 2 WO 6 heterojunction photocatalysts were synthesized by multi-step process involving chemical deposition of AgCl on the surface of Bi 2 WO 6 and subsequently photoreduction of Ag 0 nanoparticles by UV light. The as-synthesized photocatalysts were characterized by XRD , SEM, TEM, XPS , UV–vis, PL and ESR to investigate the microstructures and electronic structures. The corresponding degradation efficiencies of gaseous toluene were evaluated and the optimal Ag/AgCl/Bi 2 WO 6 exhibited almost 99.9% removal rate after 60 min illumination with visible light (>420 nm). The optical absorption properties and radical trapping experiments revealed the possible energy band structure of Ag/AgCl/Bi 2 WO 6 heterojunction. Finally, the possible enhancement mechanism was also proposed that the cooperation of surface plasmon resonance (SPR) effect, efficient separation of electron-hole pairs, extension of the carrier lifetime as well as the high redox potentials of Z -scheme heterojunction were the primary reasons. Therefore, construction of Z-scheme heterojunction of Ag/AgCl/Bi 2 WO 6 with higher redox ability is an effective way to degradation gaseous toluene under visible-light irradiation.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2022
·
IF 6.76
Jianzhi Wang,Yu Luo,Tong Xu,Ziyi Guo,Guopeng Chen,Yuchen Ren,Yanan Xue,Ning Cai,Hui Li,Faquan Yu
The development of low-cost and highly efficient electrocatalysts for oxygen evolution reaction (OER) with good conductivity, high specific surface area and abundant oxygen vacancies is of great significance for the future renewable energy conversion and storage system. Herein, Ag doped NiMoO 4 materials on the Ni foam (NiMoO 4 /Ag/NF) with rich oxygen vacancies were successfully prepared by hydrothermal strategy and layer by layer assembly method. The Ag ions are doped in-situ to promote electron transfer and compensate for the poor conductivity of metal oxides. The suitable air annealing treatment is used to create rich oxygen vacancies. The high specific surface area and one-dimensional characteristics of the cross mesoporous nanorod skeleton are responsible for the increased exposure of active centers and the rapid charge transfer behavior. The NiMoO 4 /Ag/NF exhibits high activity for OER in alkaline solution (an overpotential of 275 mV at the current density of 20 mA cm −2 ) and low Tafel slope (53.67 mV dec −1 ), and a satisfying durability in 1.0 M KOH. This study provides an effective method for the preparation of Ag doped one-dimensional nanomaterials with excellent OER catalytic performance and electrochemical stability.
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Jian Zhu,Li-na Meng,Xin Li,Guo-jun Weng,Jian-jun Li,Jun-wu Zhao
In this paper, the fluorescence quenching characteristics of Au-Ag-Pt core–shell nanorods have been studied. Due to nonradiative energy transformation, the fluorescence emission intensity of bovine serum albumin (BSA) could be greatly quenched. It has been found that the quenching effect of Au-Ag-Pt core–shell nanorods could be optimized by adjusting the concentration of chloroplatinic acid. Based on the fluorescence quenching properties of Au-Ag-Pt core–shell nanorods, Au-Ag-Pt trimetal fluorescence quenching nanoprobe has been prepared, and the specificity of alpha-fetoprotein (AFP) detection has also been realized. In order to guarantee the sensing specificity, the surface modification including carboxyl replacement, carboxyl activation and antibody connection have been performed on Au-Ag-Pt core–shell nanorods. By using the principle of specific combination of antigen and antibody, the specific detection of AFP has been realized with a lower detection limit of 4.0 pg/mL, and the linear detection range spans a scope from 0.03 to 0.5 ng/mL. Interference experiments and the actual samples detection results show that the Au-Ag-Pt trimetal core–shell nanorod probes have good anti-interference and repeatability.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Jie Xia,Xuepei Wang,Junchang Zhang,Chuiyu Kong,Wentao Huang,Xiaoshuan Zhang
To extend the application range of flexible pressure sensors and to be widely used as an economical and convenient way, researchers have made efforts toward high sensitivity, wide detection range, and low power consumption. However, most sensors can only work based on a single mechanism, thus limiting the sensing range and applicability. In view of this, we developed a dual-mechanism pressure sensor (DMPS) based on Ag nanowire/PDMS electrodes and ZnO nanoparticle-based force-sensitive membranes, which has a sandwich structure and complete flexibility under the effect of chemical bonding. It can simultaneously sense high-frequency dynamic pressure as well as static load by integrating piezoelectric and piezocapacitive effects, thereby complementing the inability of conventional piezoelectric-type sensors to continuously detect static pressure. The prepared flexible DMPS containing 20 wt % ZnO nanofiller has a pressure frequency-independent electrical output of about 2 V under 20 N force conditions and also has a long-term stability of more than 5000 pressure cycles. Moreover, it exhibits good linearity, repeatability, and stability in the 0–100 kPa detection range in the piezocapacitive mode. On the basis of multimechanism and modularity, the flexible DMPS was demonstrated for fruit quality monitoring, including avocado ripeness grading, tactile sensory gloves, and moisture loss assessment, indicating its promising applications in intelligent agricultural machines and wearable sensing systems.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Hao Yuan,Huangmei Zhou,Yu Zhao,Hao Tan,Rodolphe Antoine,Sanjun Zhang
Metal nanoclusters (NCs) have emerged as a class of promising luminescent materials for sensing, but the low luminescence efficiency hindered their applications. In this work, highly luminescent composites were synthesized by encapsulating D-penicillamine (DPA) capped silver nanoparticle-nanoclusters (AgNP-NCs) into zeolitic imidazolate frameworks (ZIF-8) (denoted as AgNP-NCs@ZIF-8) and were applied for simultaneous detection and removal of chromium(Ⅵ). The photoluminescence intensity of the AgNP-NCs was enhanced by (66 ± 5) folds due to the confinement of ZIF-8 shell, and the lifetime was prolonged from (50.9 ± 1.8) ns to (15.9 ± 0.4) μs. More importantly, thanks to the strong luminescent property of AgNP-NCs and porous structure of the ZIF-8 shell, the AgNP-NCs@ZIF-8 composites not only allowed for the detection of Cr(Ⅵ) as luminescent probe but also exhibited good adsorption capacity of Cr(Ⅵ). The luminescence intensity decreased linearly with Cr(Ⅵ) concentration in the range of 40 to 400 μM, and the limit of detection was determined to be (23.5 ± 0.8) μM. They also exhibited high selectivity toward total chromium in various interfering metal ions and good performance in real water samples. These results indicated that AgNP-NCs@ZIF-8 could serve as an attractive candidate for simultaneous detection and removal of Cr(Ⅵ) in environmental monitoring and protection.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Shiyue Wu,Qinglei Jia,Yi Wang,Feng Liu,Gongguo Zhang,Haifeng Zhang,Haiwen Zhang,Maochang Liu,Yiqun Zheng
Plasmonic semiconductor nanomaterials have been widely accepted as promising candidates for photothermal conversion, while the efficiency is yet to optimize. Herein, we report a facile synthesis of Au@Cu x O mesoporous nanospheres anchored with branched Ag nano-islands on the surface and explore their applications as photothermal conversion agent. Due to the intimate hybridization of two materials, the Au@Cu x O-Ag hybrid nanocomposites display a unique dual-plasmonic absorption that covers the visible-NIR range, benefiting the utilization efficiency of light energy . The synthesis is realized by reacting Au@Cu x O with Ag + , the galvanic replacement reaction between them enables a preferential depletion of Cu phase, leaving Ag and Cu 2 O as dominate crystal phases. The resulting hybrid nanocomposites are featured with a core-shell structure but incomplete coverage, as well as the mesoporous interior and dendritic outer shell. In addition to the enhanced photothermal conversion efficiency, the current nano-hybrids show excellent structural stability and no decay in conversion after five successive rounds of measurement. The advantages in both morphological and electronic structure aspects are discussed. The present study validates the promising synergetic use of distinct hot charge carriers originating from metal and semiconductor that are photoexcited in the same hybrid nanoparticle for photothermal conversion, shedding light on rational design of photothermal materials based on metal-semiconductor hybrid nanocomposites.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Chen Li,Tianyi Sun,Guohui Yi,Dashuai Zhang,Yan Zhang,Xiaoxue Lin,Jinrui Liu,Zaifeng Shi,Qiang Lin
A highly efficient visible light-driven photocatalytic membrane composed of Ag/CNQDs/g-C 3 N 4 and PVDF membranes was successfully prepared by vacuum filter crosslinking. This new type of photocatalytic membrane possessed both excellent photocatalytic degradation performance and photocatalytic self-cleaning properties. The Ag/CNQDs/g-C 3 N 4 photocatalyst coating amount of 10 mg had the highest photocatalytic degradation of norfloxacin (NOR), and the quasi-first-order kinetic constant ( k ) value was 0.0138 min −1 . Moreover, the mechanism of the photocatalytic reaction was also discussed. In addition, bovine serum albumin (BSA) as the simulated pollutant was applied to evaluate the self-cleaning property of the Ag/CNQDs/g-C 3 N 4 -PVDF composite membrane. After contamination with BSA, the water flux of the composite membrane decreased from 3880 L (m 2 h) −1 to 800 L (m 2 h) −1 . Then, the maximum pure water flux of the Ag/CNQDs/g-C 3 N 4 -PVDF photocatalytic composite membrane recovered 87% (3360 L (m 2 h) −1 ) within 90 min of visible light irradiation, indicating that the Ag/CNQDs/g-C 3 N 4 -PVDF photocatalytic composite membrane had excellent self-cleaning properties.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Ge Xiong,Shuling Shen,Shuning Xiao,Cong Cai,Pengfei Zhang,Zhihong Tang,Jing Li,Junhe Yang
Production of H 2 from photocatalytic seawater splitting is a more promising but more difficult way than from pure water due to the high salinity of seawater. Efficient and stable photocatalyst is crucial and desired. In this work, well-defined Z-scheme Na 2 Ti 3 O 7 /Ag/CdS (N 10 A 1 C 5 ) multidimensional heterojunctions composed of zero-dimensional Ag nanoclusters , one-dimensional Na 2 Ti 3 O 7 (NTO) nanotubes , and two-dimensional CdS nanoplates were constructed. Zero-dimensional Ag nanoclusters decorated on the surface of NTO nanotubes not only act as electron mediator for the formation of Z-scheme between NTO and CdS, but also provide hot electrons due to their plasma effect. CdS nanoplates cooperated with Ag nanoclusters act as visible light absorber, which improve both the visible light absorption range and intensity. With Na 2 S·9H 2 O (0.25 M) and Na 2 SO 3 (0.35 M) as the sacrificial agent , the resultant Z-scheme N 10 A 1 C 5 heterojunctions show a H 2 production of 1793 μmol/(g·h) from visible-light-driven photocatalytic seawater splitting, which is 9.7 times that of NTO/CdS type II heterojunctions. Notably, the Z-scheme N 10 A 1 C 5 also exhibit stability of structure in the high salinity environment due to the interlayer structure of NTO, which can accommodate metal cations in seawater. After four 3-h cycles, the catalytic activity can still maintain 96.6%. This Z-scheme heterojunction is expected to provide a strategy for the design of efficient and stable photocatalysts for the solar energy driven seawater splitting.
✓ 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）