Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2024
·
IF 3.9
Congzhi Hu,Yuye Li,Tingting Du,Youyong Pang,Yongping Liu,Botian Liu,Ling Li,Huidan Lu,Bin Huang
In this paper, a new supramolecular Z-scheme heterojunction photocatalyst, designated as Ag/Ag 3 PO 4 /Perylene diimide organic molecules after secondary acid-base self-assembly (PDI-2), was synthesized through precipitation and photoreduction techniques. Ag/Ag 3 PO 4 /60 %PDI-2 (APP-6) exhibited the best photocatalytic activity due to the synergistic effect of Z-scheme heterojunction and surface plasmon resonance (SPR) effect of Ag nanoparticles (Ag NPs). Under visible light (λ > 420 nm), the degradation efficiency of APP-6 for Rhodamine B (RhB) and Bisphenol A (BPA) was 99.7 % and 90.7 %, respectively. Additionally, PDI-2 was transformed into smaller nanoclusters, which increased the specific surface area of the photocatalyst, and reduced the charge transport distance. Moreover, APP-6 exhibited the smallest electrochemical impedance, the largest photocurrent, the smallest fluorescence lifetime. Free radical trapping experiments showed that •O 2 − was the main reactive group and a possible photocatalytic mechanism was proposed by combining the Ultraviolet–visible diffuse reflectance spectrophotometer (UV–vis DRS) and the Mott-Schottky plots.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xu Zhang,Li Tong,Xiahui Shi,Zhaosheng Li,Zhaohui Xiao,Yipu Liu,Tao Zhang,Shiwei Lin
The demand for clean energy sources has driven focus towards advanced electrochemical systems. However, the sluggish kinetics of the oxygen evolution reaction (OER) constrain the energy conversion efficiency of relevant devices. Herein, a one-step method is reported to grow oxygen vacancies (V o ) rich NiFeAg layered double hydroxides nanoclusters on carbon cloth (V o -NiFeAg-LDH/CC) for serving as the self-supporting electrode to catalyze OER. The OER performance of V o -NiFeAg-LDH/CC has been remarkably enhanced through Ag and V o co-modification compared with pristine NiFe-LDH, achieving a low Tafel slope of 49.7 mV dec −1 in 1 m KOH solution. Additionally, the current density of V o -NiFeAg-LDH/CC is 3.23 times higher than that of the state-of-art IrO 2 at 2 V under an alkaline flow electrolyzer setup. Theoretical calculations and experimental results collectively demonstrate that Ag dopant and V o strengthen the O* adsorption with active sites, further promoting the deprotonation step from OH* to O* and accelerating the catalytic reaction. In a word, this work clarifies the structural correlation and synergistic mechanism of Ag dopant and V o , providing valuable insights for the rational design of catalyst for renewable energy applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2024
·
IF 6.1
Rongze Ma,Dedan Mu,Yanni Lang,Liang Xu,Haoxin Wang,Songtao Li,Yongjin Li,Zhiguo Song,Dacheng Zhou,Yong Yang,Yugeng Wen,jin han,Jianbei Qiu
Chiral materials that possess circularly polarized luminescence (CPL) functionality along with up- and down-conversion luminescence properties present promising research opportunities. However, achieving materials that simultaneously exhibit high luminescence emission efficiency across the visible to near-infrared range while also demonstrating CPL activity remains a significant challenge. Here, we achieve a significant enhancement of luminescence from the visible to near-infrared range as well as modulation of upconversion circularly polarized luminescence (Up-CPL) through the resonant coupling of silver nanoparticles with chiral nanoparticles. Our results show that silver nanoparticles excited by 980 nm light generate localized surface plasmon resonance (LSPR), creating a concentrated electromagnetic field at their surface. The electromagnetic field interacts with the chiral material, amplifying the strength of the chiral field, hereby enhancing the intensity of luminescence from the visible to near-infrared. This study presents a novel approach for enhancing visible to near-infrared luminescence intensity and realizing circularly polarized luminescence by using rare-earth-doped chiral inorganic materials coupled with Ag nanoparticles.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2024
·
IF 7.7
Junlong Zhang,Jie Wei,Jianting Li,Minchuan Xiahou,Zehao Sun,Ao Cao,Youxin Yuanfeng,Guogang Chen,Yanchun He
The indiscriminate discharge of micropollutants ( e.g. , dyes, antibiotics, industrial additives, etc .) represents a significant risk to human health, and the removal of these substances from water bodies has become a prominent area of research within the field of environmental remediation. A simple hydrothermal-precipitation-photoreduction method was employed to synthesize novel Z-scheme heterojunction photocatalysts of AgBr/CoWO 4 /Ag. The catalysts demonstrated remarkable degradation capabilities with regard to a range of micropollutants present in wastewater. Of the catalysts tested, 5AgBr/CoWO 4 /Ag exhibited the highest degradation rates, reaching 98.58% for Rhodamine B, 86.82% for tetracycline hydrochloride, and 95.60% for 2-mercaptobenzothiazole within 60 min. In particular, the reaction kinetic rate of 5AgBr/CoWO 4 /Ag towards Rhodamine B degradation ( k 2 = 0.26278 L mg −1 ·min −1 ) is 9 times that of AgBr ( k 2 = 0.02953 L mg −1 ·min −1 ) and 113 times that of CoWO 4 ( k 2 = 0.00233 L mg −1 ·min −1 ), which serves to highlight the exceptional photocatalytic activity of the material. The experimental data and subsequent analysis indicated that the enhanced photocatalytic performance can be attributed to two factors: firstly, the electron mediation by Ag nanoparticles leading to improved charge separation efficiency, and secondly, the formation of Z-scheme heterojunctions between AgBr and CoWO 4 . The cyclic tests provided confirmation of the excellent stability and recyclability of the AgBr/CoWO 4 /Ag photocatalysts. It is anticipated that this study will facilitate the development of novel methods for the degradation of refractory micropollutants and provide insights into environmental remediation, thereby contributing to the sustainable development of society.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2024
·Vol. 35
·期 19
·195710
·
IF 2.9
Hang Chen,Caiqin Han,Le Zhang,Ying Wu
A surface enhanced Raman scattering (SERS) substrate of porous rod-shaped ferric oxide (Fe2O3) combined with silver nanoparticles (Ag NPs) and black phosphorus (Fe2O3/Ag/BP) was fabricated to detect the persistent organic pollutants (POPs) at low concentration. The organic pollutant Rhodamine 6G (R6G) was used as the probe molecule to study the performances of Fe2O3/Ag/BP, and 4-chlorobiphenyl (PCB-3) was the target of detection. The limit of detection (LOD) of R6G based on this novel SERS substrate Fe2O3/Ag/BP was as low as 1.0 × 10−15 M, which was five orders of magnitude lower than that of Fe2O3/Ag (10−10 M). The enhancement factor (EF) of Fe2O3/Ag/BP was 6.44 × 108, which was 3.1 times higher than that of porous rod-shaped Fe2O3/Ag (2.08 × 108). The Raman signal of R6G based on Fe2O3/Ag/BP had a good homogeneity, and the relative standard deviation (RSD) of Raman signal intensities of R6G at 1643 cm−1 was only 5.97%. Furthermore, the Fe2O3/Ag/BP substrate exhibited a recyclability through the photocatalytic degradation of R6G. The LOD of PCB-3 based on Fe2O3/Ag/BP was 10−9 M. Besides, Fe2O3/Ag/BP had a high SERS activity even it was kept in a centrifuge tube without requiring complicated treatment. These results highlight the potential application of Fe2O3/Ag/BP for ultra-trace detection of POPs in the environment.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
·
2018
·Vol. 16
·期 1
·1-16
·
IF 5.294
Fan Wei,Sun Qing,Li Yanyun,Tay Franklin R.,Fan Bing
Background Ag + and Zn 2+ have already been used in combinations to obtain both enhanced antibacterial effect and low cytotoxicity. Despite this, it is still unclear how the Zn 2+ co-works with Ag + in the synergistic antibacterial activity. The main purposes of this study were to investigate the co-work pattern and optimum ratio between Ag + and Zn 2+ in their synergistic antibacterial activity against E. faecalis , the possible mechanisms behind this synergy and the primary application of optimum Ag + –Zn 2+ co-work pattern against the E. faecalis biofilm on dentin. A serial of Ag + –Zn 2+ atomic combination ratios were tested on both planktonic and biofilm-resident E. faecalis on dentin, their antibacterial efficiency was calculated and optimum ratio determined. And the cytotoxicity of various Ag + –Zn 2+ atomic ratios was tested on MC3T3-E1 Cells. The role of Zn 2+ in Ag + –Zn 2+ co-work was evaluated using a Zn 2+ pretreatment study and membrane potential—permeability measurement. Results The results showed that the synergistically promoted antibacterial effect of Ag + –Zn 2+ combinations was Zn 2+ amount-dependent with the 1:9 and 1:12 Ag + –Zn 2+ atomic ratios showing the most powerful ability against both planktonic and biofilm-resident E. faecalis. This co-work could likely be attributed to the depolarization of E. faecalis cell membrane by the addition of Zn 2+ . The cytotoxicity of the Ag + –Zn 2+ atomic ratios of 1:9 and 1:12 was much lower than 2% chlorhexidine. Conclusions The Ag + –Zn 2+ atomic ratios of 1:9 and 1:12 demonstrated similar strong ability against E. faecalis biofilm on dentin but much lower cytotoxicity than 2% chlorhexidine. New medications containing optimum Ag + –Zn 2+ atomic ratios higher than 1:6, such as 1:9 or 1:12, could be developed against E. faecalis infection in root canals of teeth or any other parts of human body.
✓ 已验证
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2026
·
IF 6.6
Yao Wang,Ziling Guo,Ziyan Shen,Liang Zhang,Bing Xu,Kangkang Wang,Zhixian He,Shengnan Zhang
A superhydrophilic/underwater superoleophobic Ag/ZrO₂-PC coating was fabricated on stainless steel mesh. • The coating exhibits a separation efficiency of >99.9% and a flux of 1.82 × 10 4 L·m −2 ·h −1 . • Efficiency remains >98.7% under acid, alkali, and saline conditions. • Photocatalytic self-cleaning recovers surface wettability (51° → 13.8°) under visible light. As environmental pollution intensifies and water quality regulations become increasingly stringent, the development of efficient separation technologies has emerged as a critical priority. In this study, Ag/ZrO 2 -PC (AZPC) composite coatings with photocatalytic self-cleaning properties were fabricated on stainless-steel meshes via metal-organic deposition combined with hydrothermal processing, enabling highly efficient oil-water separation. The resultant coatings exhibit a micro−/nano-scale rough topography, which impacts superhydrophilicity (water contact angle (WCA) of 0°) and underwater superoleophobicity (underwater oil contact angle (UOCA) of 161°). The composite membrane achieves an oil-water separation efficiency exceeding 99.9%, with a maximum permeation flux of 1.82 × 10 4 L·m −2 ·h −1 . After 20 separation cycles, the membrane retains a separation efficiency above 98.6% for different oil-water mixtures, demonstrating excellent cyclic stability. Furthermore, after 60 min of visible-light irradiation, the surface WCA decreased significantly from 51° to 13.8°, thereby demonstrating superior self-cleaning capability. Collectively, these findings indicate that the as-prepared composite material demonstrates outstanding stability and durability, rendering it highly promising for practical applications in high-efficiency oil-water separation.
✓ 已验证
DOI
高影响因子
TALANTA
·
2015
·
IF 3.545
Di Zhang,Ying Sun,Qiong Wu,Pinyi Ma,Hua Zhang,Yuanpeng Wang,Daqian Song
A novel surface plasmon resonance (SPR) biosensor based on Ag nanocubes/chitosan composite was fabricated for mouse IgG detection. Ag nanocubes (AgNCs) were successfully synthesized with sulfide-mediated protocol. They were characterized with transmission electron microscopy (TEM) and UV–vis adsorption spectrum. AgNCs were etched by 3-Mercaptopropinic acid (MPA) and simply mixed with chitosan and glutaraldehyde . The Ag nanocubes/chitosan composite was deposited on Au film by the spin-coating. The electronic coupling between the AgNCs and the surface plasmon wave leads to the amplification of the SPR response, which results in the sensitivity enhancement of SPR biosensor. Moreover, antibody can be immobilized on Au film with aldehyde groups via Schiff alkali reaction. The traditional SPR biosensor based on MPA shows a response for mouse IgG in the concentration range of 2.50–40.00 μg mL −1 . The SPR biosensor based on AgNCs/chitosan composite shows a good response for mouse IgG in the concentration range of 0.60–40.00 μg mL −1 . The limit of quantification by the biosensor based on AgNCs/chitosan composite substrate is about 4 times lower than traditional biosensor, which has proved the SPR biosensor here proposed with more sensitivity and better performance than traditional SPR biosensor.
✓ 已验证
DOI
PubMed
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 11
·1909
·
IF 5.719
Chu-Ya Wang,Qi Zeng,Li-Xia Wang,Xin Fang,Guangcan Zhu
Based on the low utilization rate of visible light and the high-charge carriers-recombination efficiency of bismuth oxybromide (BiOBr), in this work, noble metal Ag was used to modify BiOBr, and Ag-doped BiOBr nanoplates (Ag-BiOBr) were obtained through a one-step hydrothermal method. Compared with BiOBr, the absorption edge of Ag-BiOBr showed a redshift from 453 nm to 510 nm, and the absorption efficiency of visible light was, obviously, improved. Bisphenol A (BPA) was chosen as the target pollutant, to evaluate the photocatalytic performance of the samples. Ag0.1-BiOBr showed the highest degradation efficiency. The intrinsic photocatalytic activity of Ag0.1-BiOBr, under visible light, was approximately twice as high as that of BiOBr. In this way, a new visible-light-driven photocatalyst was proposed, to fight against organic pollution, which provides a promising strategy for water and wastewater treatment.Keywords:bismuth oxybromide (BiOBr);Ag-doping modification;visible light;charge separation;bisphenol A (BPA)
✓ 已验证
DOI
PubMed
高影响因子
ADVANCED SYNTHESIS & CATALYSIS
·
2016
·Vol. 358
·期 16
·2631-2641
·
IF 6.453
Lingling Wang,Min Yu,Chaolong Wu,Nan Deng,Chao Wang,Xiaoquan Yao
In this contribution, an Ag/g-C 3 N 4 nanocomposite was synthesized and utilized as highly efficient and green photocatalyst for organic reactions under visible light irradiation. A layered, porous g-C 3 N 4 was synthesized following a modified solvothermal-roasting process by using melamine and cyanuric chloride as precursor. Silver nanoparticles (NPs) were well anchored on g-C 3 N 4 nanosheets, which were prepared by a facile impregnation–roasting method. The inexpensive, stable g-C 3 N 4 coupled with the localized surface plasmon resonance (LSPR) effect of Ag NPs exhibited high photocatalytic activities toward aerobic oxidative amidation of aromatic aldehydes under visible light irradiation. Good to excellent yields were achieved for various substrates under the light of a 25 W compact fluorescent light (CFL) bulb in air. The operationally easy procedure provides an economical, green, and mild alternative for the formation of amide bonds.
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 97
·79342-79347
·
IF 3.84
Xingrong Xiao,Hui Yang,Nuoxin Xu,Liang Hu,Qilong Zhang
Ag@TiO2 core–shell nanoparticles were synthesized as fillers using a simple vapor-thermal method. Based on the nanoparticles, the P(VDF-HFP)/Ag@TiO2 hybrid films were first prepared by embedding Ag@TiO2 nanoparticles in a poly(vinylidene fluoride co-hexafluoropropylene) [P(VDF-HFP)] matrix. Microstructural and thermal analysis confirmed that Ag nanoparticles had been successfully coated by TiO2 shells and that the thickness of the shell layer was about 8–10 nm. The Ag@TiO2 nanoparticles act as nucleation sites to promote crystallization of the polymer matrix without changing its structure. The P(VDF-HFP)/Ag@TiO2 composite exhibited enhanced dielectric properties over a wide frequency range, and the dielectric permittivity of the polymer nanocomposites is enhanced by ∼300% over the P(VDF-HFP) matrix at a low filler loading of 10 vol%. Moreover, P(VDF-HFP)/Ag@TiO2 also exhibit a higher dielectric constant than P(VDF-HFP)/Ag, P(VDF-HFP)/TiO2 and P(VDF-HFP)/Ag/TiO2 blend composites while maintaining a low loss tangent (below 0.03 at 1 kHz) to achieve a duplex polarization effect.
✓ 已验证
DOI
高影响因子
Nanoscale Advances
·
2018
·Vol. 1
·期 2
·840-848
·
IF 0
Xiaoxin Wang,Wuzhu Sun,Weiyi Yang,Shuang Gao,Caixia Sun,Qi Li
Ag is the most effective metal disinfectant against pathogenic microorganisms and thus, various approaches have been exploited to enhance the dispersity and control the release of Ag+ ions from Ag nanoparticles. In this study, a superparamagnetic Fe3O4@SiO2@Ag@porous SiO2 disinfectant with a double-layer core–shell structure was developed. Its superparamagnetic Fe3O4 nanosphere core ensured its good dispersity in water and allowed its easy magnetic separation after treatment. Its dense SiO2 inner shell protected the Fe3O4 nanosphere core and allowed a good loading of Ag nanoparticles. Its mesoporous SiO2 outer layer effectively protected the Ag nanoparticles from detachment, and its mesoporous channels resulted in lower silver oxidation and dissolution for the controlled release of Ag+ ions. Thus, a highly efficient, silver-based disinfectant was developed, as demonstrated by its effective disinfection of Escherichia coli bacteria with good recycle performance, while the silver concentration in the treated water met the MCL of silver for drinking water.
✓ 已验证
DOI
PubMed
危险品化学品经营许可证（带存储）