DALTON TRANSACTIONS
·
2021
·Vol. 51
·期 6
·2219-2225
·
IF 4.39
Chen Chen,Jiamei Zhao,Dong Guo,Keyu Duan,Yongqiang Wang,Xiaowen Lun,Conglu Zhang
CaTiO3 is considered to be one of the most promising catalysts for the degradation of organic pollutants, but its application is limited by the wide band gap and low catalytic activity. Element doping is an effective strategy to solve these problems. Herein, a novel CaTiO3 co-doped with Ag and Co (Ca1−xAgxTi1−yCoyO3) was synthesized by combining co-precipitation and the microwave hydrothermal method for the first time. The crystal structure, microstructure and light absorption of the material were systematically investigated. The results showed that Ca1−xAgxTi1−yCoyO3 had higher light absorption than pure CaTiO3, and the band gap was reduced to 2.78 eV. First-principles calculations indicated that Ag–Ca and Co–Ti tended to form donor–acceptor defect pairs in the doping process. These defect states not only enhanced the adsorption properties, but also could be used as carrier traps to optimize the dielectric properties of CaTiO3. In the photoelectrocatalytic system, with 0.01 g of catalyst, 98% of methylene blue in 100 mL solution (10 mg L−1) was degraded in 150 min. In addition, Ca1−xAgxTi1−yCoyO3 showed strong stability and excellent recyclability. The double ion co-doping technology will provide an effective strategy for improving the catalytic activity of traditional wide-band gap semiconductors.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Photonics
·
2022
·Vol. 9
·期 9
·628
·
IF 2.536
Chunlei Tao,Daqiang Hu,Ying Wang,Jiang Zhu,Jian Liu
The Ag nanowires/ZnO:Al nanorods (Ag NWs/AZO NRs) composite films were prepared by the simple hydrothermal growth of AZO NRs on the AZO seed layer (SL) at the void regions among the Ag NWs. Distinctive morphology evolution of the Ag NWs depending on the mass of FeCl3⋅6H2O solution was observed on the AZO SL. The effect of Ag NWs with different morphologies on the structure, morphology, optoelectronic properties and light trapping abilities of Ag NWs/AZO NRs composite films was investigated systematically. In particular, the relationship between the morphology, light trapping and electrical properties of the composite films was analyzed in detail. When 7 g of FeCl3⋅6H2O solution was added, Ag NWs with a length of about 50 μM were generated, and the Ag NWs overlapped adequately with each other to form a network structure beneficial to conductivity. Meanwhile, the Ag NWs/AZO NRs composite films containing Ag NWs prepared with 7 g FeCl3⋅6H2O solution exhibited high TT (above 80%), high haze value (0.29) at 550 nm and low sheet resistance (5.9 Ω/sq), which can be employed as transparent electrodes for improving electrical and light trapping properties in solar cells.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2020
·Vol. 10
·期 24
·8445-8457
·
IF 5.721
Kun Liu,Yichen Zhao,Jiale Wang,Qingsong Xue,Guofeng Zhao
The fabrication of qualified catalysts is a key issue to implement gas-phase aerobic alcohol oxidation but necessarily requires understanding the structures of catalytic active sites and the supply of active oxygen species. Herein, we present one example of the Ag–CoO/Ti- powder catalyst for gas-phase benzyl alcohol aerobic oxidation. The first interesting observation is that the Ag–Co3O4 ensembles on the fresh catalyst could be transformed into Ag–CoO due to the presence of reductive benzyl alcohol. The preferred catalyst with 3 wt% Ag and 3 wt% CoO exhibits 93% benzyl alcohol conversion and 99% benzaldehyde selectivity at a weight hourly space velocity of 20 h−1 and a temperature of 240 °C. The structures of Ag–CoO ensembles and oxygen species supply were probed and identified by electron microscopy and other spectroscopy techniques in combination with temperature-programmed thermal analyses, pulse experiments, and kinetic studies. In nature, the oxygen species is generated at the Ag–CoO interfacial sites in the form of atomic oxygen with appropriate chemisorption strength on these sites to achieve a high oxidation activity of benzyl alcohol. Moreover, the Co3O4 ↔ CoO cycle is promoted by Ag at low temperature such as 240 °C to endow the Ag–CoO ensembles with excellent catalytic performance.
研究领域:
催化化学
·
材料科学
·
物理化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
·
2025
·
IF 3.6
Jian-Wu Xiao,Dong-Dong Mai,Dong-Liang Shi,Guo-Cui Bao,Yin-Qian Lu,Li-Bao Chen,Xiao-Ying Pei,Jing-Shui Xu,Fu-An He,Kwok-Ho Lam
The CoFe 2 O 4 @reduced graphite oxide (rGO) was prepared by a one-step solvothermal reaction, and then the Ag nanoparticles were deposited on the CoFe 2 O 4 @rGO by a green mild reduction reaction to form the novel Ag-CoFe 2 O 4 @rGO filler, followed by the modification of Ag-CoFe 2 O 4 @rGO using hexadecyltrimethoxysilane to form the novel H-Ag-CoFe 2 O 4 @rGO filler. The homogeneous distribution of the Ag-CoFe 2 O 4 @rGO and H-Ag-CoFe 2 O 4 @rGO fillers in the polar PVDF plastic polymer and nonpolar SBS elastomer copolymer, respectively, to form the corresponding composites was proved by SEM. The polar crystal content of the PVDF matrix in the Ag-CoFe 2 O 4 @rGO(10 wt.%)/PVDF composite was 36.13%, while the corresponding value for pure PVDF was 29.38%. The dielectric constant at 1000 Hz of Ag-CoFe 2 O 4 @rGO(10 wt.%)/PVDF and H-Ag-CoFe 2 O 4 @rGO(10 wt.%)/SBS composites was 15.54 and 2.78, respectively, while the corresponding values for pure PVDF and pure SBS were 8.39 and 2.05, respectively. Additionally, although both pure PVDF and pure SBS were non-magnetic, the magnetization values of Ag-CoFe 2 O 4 @rGO(10 wt.%)/PVDF and H-Ag-CoFe 2 O 4 @rGO(10 wt.%)/SBS composites were 0.83 emu/g and 0.47 emu/g, respectively, at 50,000 Oe. The as-prepared Ag-CoFe 2 O 4 @rGO/PVDF and H-Ag-CoFe 2 O 4 @rGO/SBS composites should have the potential for different applications including dielectric capacitors, dielectric elastomers, sensors, EMI shielding, and so on. Graphical Preparation process of CoFe 2 O 4 @rGO and Ag-CoFe 2 O 4 @rGO hybrid filler.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Suhong Lu,Nan Sun,Liwei Gong,Chengyu Xu,Rongrong Guo,Yiyao Li,Shuo Wang,Jurong Liu,Yuzhen Fang,Guilong Liu
Hollow urchin-like Co 3 O 4 -MnO 2 spheres were synthesized via hydrothermal method, followed by co-impregnation with 3 wt% Ag and K (3, 5, 7 wt%). The optimized Ag-5 K/Co 3 O 4 -MnO 2 catalyst achieved complete HCHO conversion at 50 °C under 150 ppm HCHO, 21 vol% O 2 /N 2 , RH = 30 %, and WHSV = 36,000 mL g cat -1 h −1 . Systematic parameter studies (0 ∼ 80 % RH, 50 ∼ 350 ppm HCHO, 5 ∼ 21 vol% O 2 , 36,000 ∼ 144,000 mL g cat -1 h −1 WHSV) demonstrated the robust catalytic performance of Ag-5 K/Co 3 O 4 -MnO 2 across wide operational ranges. Remarkably, Ag-5 K/Co 3 O 4 -MnO 2 demonstrated excellent stability and nearly 100 % HCHO conversion over a continuous period of 100 h with the WHSV of 36,000 mL g cat -1 h −1 . The hollow architecture enhanced reactant diffusion, while interconnected nanorod arrays provided abundant Ag/K anchoring sites. Potassium doping increased Ag/Ag + , (Mn 2+ + Mn 3+ )/Mn 4+ and Co 3+ /Co 2+ ratios via strengthened Ag-support interactions, promoting oxygen activation. Mechanistic analysis indicated HCHO oxidation proceeds via HCHO → DOM → HCOO – + OH – →CO 2 + H 2 O route.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Zhenglong Chen,Yeting Tu,Zhile Zhao,Yiqing Chen,Jingzheng Weng,Hui Lin,Yudong Lu
The engineering of multifunctional plasmonic interfaces on flexible substrates is paramount for advanced molecular sensing. In this study, a high-performance, hierarchical bimetallic SERS substrate, featuring an Ag NWs/PDDA/GO/Ag NCs sandwich architecture, was fabricated on cellulose filter paper via a facile electrostatic self-assembly strategy. By employing poly(diallyl dimethylammonium chloride) (PDDA) as a molecular linker to regulate interfacial charges, we achieved the sequential, high-density loading of 1D silver nanowires (Ag NWs), 2D graphene oxide (GO), and 0D silver nano cubes (Ag NCs).Physicochemical characterizations revealed that the ultrathin GO layer functions as a dielectric nano spacer, which effectively facilitates vertical plasmonic coupling between the bimetallic components to generate high-density 3D “hotspots” while simultaneously serving as a passivation barrier against metallic oxidation. The synergy of electromagnetic enhancement (EM) from the hierarchical sandwich structure and chemical enhancement (CM) via interfacial charge transfer resulted in an exceptional enhancement factor of 2.82 × 10 6 .The engineered substrate enabled the ultra-sensitive detection of paraquat with a limit of detection (LOD) of 10 -10 M. Furthermore, it demonstrated remarkable matrix-robustness for the in situ analysis of pesticide residues in untreated tea broth, maintaining high signal reproducibility (RSD < 7%). This work provides a versatile interfacial engineering strategy for the controllable assembly of heterogeneous nanostructures, paving the way for high-performance, field-deployable surface-sensitive applications in food safety and environmental monitoring.
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2026
·
IF 11.8
Jiacheng Zheng,Yulong Deng,Wenting Chen,Chengliao Deng,Xiaoming Cai,Jinming Cai,Honglin Tan
Zinc indium sulfide (ZnIn 2 S 4 , ZIS), a visible-light-responsive photocatalyst, has garnered significant attention due to its facile synthesis, high stability, suitable band gap, and abundant active sites. This study innovatively constructed a CNT@Ag@ZIS tubular structure, introducing Ag mediators as electron donors at the CNT-ZIS interface. Results demonstrate that the Ag mediators establish clear interfacial contact with both hexagonal ZIS and CNT. Consequently, ZIS exhibits markedly enhanced photocurrent response and improved separation efficiency of photogenerated charge carriers. The catalyst achieved a remarkable hydrogen evolution rate of 18.44 mmol g −1 h −1 , representing an 8.7-fold enhancement over pristine ZIS. The study revealed that Ag, with its high Fermi level, facilitates interfacial electron transfer to ZIS. This induces a downshift of the p-band center (3p orbitals of S) in ZIS, simultaneously prolonging the H─S bond length and increasing the antibonding orbital occupation. This electron restructuring creates electron-rich S (2+δ)− active sites, substantially lowering the H 2 desorption energy barrier. Thus, the surface reaction kinetics of the sulfide are optimized through a regulation strategy targeting antibonding orbitals.
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Zengsen Sun,Xinhao Wu,Daqin Guan,Xiaoyi Chen,Jie Dai,Yuxing Gu,Sixuan She,Wei Zhou,Zongping Shao
Electrochemical CO2 reduction (ECR) technology is promising to produce value-added chemicals and alleviate the climate deterioration. Interface engineering is demonstrated to improve the ECR performance for metal and oxide composite catalysts. However, the approach to form a substantial interface is still limited. In this work, we report a facile one-pot coprecipitation method to synthetize novel silver and silver-doped ceria (Ag/CeO2) nanocomposites. This catalyst provides a rich 3D interface and high Ce3+ concentration (33.6%), both of which are beneficial for ECR to CO. As a result, Ag/CeO2 exhibits a 99% faradaic efficiency and 10.5 A g–1 mass activity to convert CO2 into CO at an overpotential of 0.83 V. The strong interfacial interaction between Ag and CeO2 may enable the presence of surface Ce3+ and guarantee the improved durability during the electrolysis. We also develop numerical simulation to understand the local pH effect on the ECR performance and propose that the superior ECR performance of Ag/CeO2 is mainly due to the accelerated CO formation rate rather than the suppressed hydrogen evolution reaction.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Ling Zhou,Jie Yang,Xinyue Wang,Gao Song,Fan Lu,Lijun You,Jumei Li
A novel highly active surface enhanced Raman scattering (SERS) substrate of Ag nanoparticles decorated Ag@ZrO 2 composite nanosphere was prepared and characterized. A uniform ZrO 2 shell was firstly coated over Ag cores by sol-gel process using zirconium butoxide as Zr precursor to achieve Ag@ZrO 2 nanospheres and then Ag nanoparticles were in situ deposited on the Ag@ZrO 2 through the reduction of AgNO 3 to produce Ag@ZrO 2 @Ag composite nanospheres. The cover density of Ag nanoparticles on Ag@ZrO 2 @Ag nanospheres could be controlled by changing the concentration of AgNO 3 . TEM , FE-SEM, EDX, UV–vis and XRD analyses were used to characterize their morphology, structure and composition . The SERS property of Ag@ZrO 2 @Ag was evaluated using 4-mercaptobenzoic acid (4-MBA) as Raman probe molecules. The experimental results showed Ag@ZrO 2 @Ag nanospheres presented remarkably SERS activity, high signal reproducibility (RSD = 6.39%) and exceptional storing stability. Subsequently, the Ag@ZrO 2 @Ag nanospheres acted as SERS substrates to sense Cr (VI) in water at various concentrations, and the SERS results showed great linear correlation between SERS intensities and the concentration of Cr (VI) (R 2 = 0.97) with the detection limit of 0.5 μM, which is below the safety level (1 μM) in drinking water of United States Environmental Protection Agency. The Ag@ZrO 2 @Ag nanospheres were also successfully used to confirm the concentration of Cr (VI) in real industrial wastewater. These results demonstrated the extraordinary potential of Ag@ZrO 2 @Ag composite nanospheres serving as SERS substrates for trace and quantitative determination of Cr (VI) in environmental field.
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 27
·9274-9281
·
IF 4.174
He Li,Yu Zou,Jiang Jiang
Ag and CuO in the form of nanoparticles have been widely used in our daily life as antibacterial agents, through releasing Ag ions and generating reactive oxygen species (ROS). In this work, we demonstrate that by synthesizing Ag@CuO nanohybrids with core–shell configurations, their bactericidal activity can be synergistically enhanced compared to the respective constituents. Upon AM 1.5G light illumination for short durations, the measured minimum inhibitory concentrations of the Ag@CuO nanohybrids show a significant decrease against both Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus bacterial strains, requiring only 7% and 34% of those when conducted in the dark. The spread plate results demonstrate that with nanohybrid concentrations of 11.0 and 21.9 mg L−1, at least 7 orders of magnitude decrease in Escherichia coli and Staphylococcus aureus colony forming units is achieved, when the Ag@CuO nanohybrids are exposed to light illumination for 10 min. The effect of illumination is found to induce Ag+ release and enhance 1O2 generation, which act concertedly to facilitate the remarkable photo-enhanced bactericidal effect.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2018
·Vol. 32
·期 8
·e4428
·
IF 3.581
Songfang Zhao,Haobo Jiang,Jinhui Li,Xiangying Meng,Tianyu Chao,Zhe Zhang,Peng Zhang,Yongju Gao,Duxia Cao
Efficient and reusable nanocatalysts fabricated via a facile assembly are highly desirable for the cost-effective hydrogenation reduction. Inspired by a fishing process with a fishnet, multifunctional nanostructured catalysts are rationally designed to combine interesting features via the self-redox assembly of Fe 3 O 4 -Ag composites on reduced graphene oxide (rGO) (Fe 3 O 4 -Ag/rGO). In detail, Fe 3 O 4 nanoparticles (NPs) endow the ternary hybrids with superparamagnetism (21.42 emu g −1 ), facilitating catalysts to be separated from the reaction system. rGO could provide electron transfer pathways, enhancing catalytic activity. More interestingly, GO and Ag + could behave as oxidants to oxidize Fe 2+ for the in situ assembly of Fe 3 O 4 -Ag/rGO without any addition of reductant/oxidant or organic solvents, and AgNPs endow the ternary hybrids with excellent catalytic behaviour. Meaningfully, the bioinspired process enables the ternary hybrids to possess more abundant micro−/nanopores, larger surface area, and more amorphization. They exhibit exceptional catalytic performance, and could be recycled with excellent activity by means of convenient magnetic separation (at least 7 times). Moreover, the ternary hybrids could degrade methylene blue under UV light due to different valence states of Fe in Fe 3 O 4 . Therefore, the proposed bioinspired assembly and structure design for hierarchical catalysts would pave a promising way to assemble other catalysts.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2024
·
IF 4.2
Ting Xu,Shuang Wang,Tao Wang,Xin Li,Yanli Chen,Qiong Wu,Lili Yang,Xiaoyan Liu,Maobin Wei,Jian Cao
Coupling Ag NPs and direct Z-scheme heterojunction in Fe 3 O 4 @SiO 2 @ZnO-PDA-Ag photocatalysts (FSZ-PDA-Ag) were constructed via the self-polymerization of dopamine. The effects of the loading amounts of Ag NPs on the structure, morphologies, and properties of the photocatalysts were investigated. Under ultraviolet and visible light irradiation, FSZ-PDA-Ag5 exhibited superior photocatalytic activity for tetracycline degradation. Direct Z-scheme ZnO-PDA heterojunction formed in FSZ-PDA-Ag could promote the transfer efficiency of electrons, and then inhibit the recombination of photo-generated charges. Meanwhile, the appropriate load of Ag NPs acted as another conductive channel to further facilitate the electrons transfer , which could extend the lifetime of the photo-generated charges. Thus, the multiple pathways of electrons transfer resulted in the enhanced photocatalytic activity , the degradation mechanism of FSZ-PDA-Ag5 was explored in detail. Moreover, this photocatalyst possessed superior cycling stability and reusability for the wastewater purification. This study may provide a reference for designing efficient and stable photocatalysts.
✓ 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）