APPLIED SURFACE SCIENCE
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2018
·
IF 4.439
Ayyakannu Sundaram Ganeshraja,Kaixin Zhu,Kiyoshi Nomura,Junhu Wang
The hierarchical silver chloride loaded tin-doped titania (AgCl@Sn-TiO 2 ) microspheres were first time prepared by a hydrothermal method and annealing at different temperatures. The catalyst showed the enhanced visible light photocatalytic activity as compared to the plasmonic photocatalysts of AgCl and Ag/AgCl, and commercial Degussa P25 (TiO 2 ). The improved efficiency is considered to local surface plasmonic resonance (AgCl could reduce to Ag 0 during photocatalytic reaction) in enhanced broad band visible light absorption in addition to the characteristics of heterojunction between Sn-TiO 2 and AgCl NPs. Moreover, the surface and bulk properties of as-synthesized samples were analyzed by 119 Sn Mössbauer spectroscopy. The magnetic property of the bulk was studied as a function of magnetic field with different temperatures. These results signify the clear details of the magnetic and visible light photocatalytic activities of hierarchical AgCl@Sn-TiO 2 microspheres.
研究领域:
材料科学
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环境科学
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纳米技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Meng Li,Jingxue Sun,Bowen Cong,Shunyu Yao,Gang Chen
The optical and electronic properties of plasmonic semiconductor nanomaterials have attracted a lot of attention. In this study, sulfur vacancies was regulated to achieve carriers density of 10 17 ~ 10 23 cm −3 , with the characteristics of localized surface plasmon resonance (LSPR). Since the excitation of LSPR, the plasma electrons on the semiconductor surface are elevated to a higher energy state. These electrons can overcome the energy barrier between BS and Cd 0.5 Zn 0.5 S (CZS), directly transferred to the conduction band (CB) CZS components as electron donor. This effect may cause more electrons on the semiconductor CB to react with H 2 O to generate more hydrogen. By calculating the Debye length, the scale of the charge effect in the plasma is measured. It can be proved that LSPR is instrumental in the available separation of electrons and holes in semiconductors, and significantly improves the hydrogen production effect of CZS/BS-1.5 nanocomposites. This research furnishes new insights for the construction of efficient and novel polyphase photocatalysts.
研究领域:
材料科学
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光催化
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2020
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IF 5.339
Dapeng Sun,Yi Wu,Shwu-Jen Chang,Ching-Jung Chen,Jen-Tsai Liu
Glycated hemoglobin (HbA1c) has been widely explored as an important marker for monitoring and diagnosing diabetes. Due to the advantages of high selectivity , easy preparation, and convenient preservation of aptamers , research on glycated hemoglobin detection utilizing aptasensors has received much attention in recent years. However, factors such as the pH and the salt concentration of the solution and the structure of the aptamer could influence the interactions between HbA1c and the aptamer. In this study, the factors were evaluated using surface plasmon resonance (SPR). The results show that the pH and the salt concentration can greatly affect the formation of a complex between the aptamer and HbA1c. In the stereostructure of the aptamer, loop L1 may be an important motif for recognizing glycated hemoglobin. In addition, the best condition for detecting HbA1c was at pH 6, with a high sensitivity and a low limit of detection(LOD) (1.06 × 10 −3 RU nM /2.55 nM). The results also demonstrated that the use of an SPR aptamer biosensor can be a sensitive technique to improve the accuracy and correctness of HbA1c measurement.
研究领域:
生物化学
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医学诊断
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Lingjiao Li,Jing Xu,Binyi Su
In the field of photocatalysis, most of the photocatalysts are semiconductors. Recent years, there have been many photocatalytic systems related to non-semiconductor catalysts. In this paper, a photocatalytic hydrogen evolution system of hexagonal Ni(OH) 2 derived from CuNi bimetal is obtained by classical hydrothermal method. The derived hexagonal Ni(OH) 2 can promote the separation of photogenerated electron-hole pairs and greatly improve the effect of photocatalytic hydrogen evolution. The electron-hole pair comes from the surface plasmon resonance (SPR) effect of Cu from CuNi composite. It is worth noting that photoluminescence spectra and photoelectrochemical experiments have confirmed that the CuNi-5 complex can effectively improve space charge separation. The results of linear scanning voltammetry show that the material has high current response characteristics. This system gives a practical solution for planning and synthesizing non-semiconductor catalysts with high photocatalytic activity.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2020
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IF 4.3
Zhimin Wang,Fengjiao Zhang,Aimin Ning,Dongcan Lv,Guangce Jiang,Andong Song
Direct photocatalysis with plasmonic nanostructures represents a new and promising direction in pollutant disposal. In current practice, inert metal oxides are usually used as supports to load plasmonic nanoparticles . However, due to the lack of stabilizing functional groups on the surface of these metal oxides , the stability and dispersibility of the obtained nanostructures are poor. Herein, a nano-diamond (ND) material with easily functionalized surface was used as an inert support to load silver nanoparticles to prepare plasmonic nanostructures with direct photocatalytic ability. The plasmonic nanostructure can be easily prepared by modifying the surface of ND with pyridine groups and then reducing the silver precursor in-situ. Thanks to pyridine group's dual functions of complexing Ag nanocrystals and dispersing ND, the obtained plasmonic nanostructure not only has uniformly distributed Ag nanocrystals on ND surface, but also shows excellent multi-solvent dispersibility. we demonstrate that this novel plasmonic nanostructure can directly decolorization of methyl blue (MB) under visible light irradiation with a standard rate constant as high as 28.4 s −1 g −1 . In addition, the catalyst can be easily recovered and recycled for at least five times while maintaining high catalytic activity . The mechanism study shows that the localized surface plasmon resonance energy transfer of Ag nanoparticles is the direct driving force of MB degradation. The inert ND support can not only ensure the physical stability of Ag nanoparticles, but also avoid the attenuation of plasmonic resonance energy to matrix, which plays an indispensable synergistic role in promoting the rapid degradation of MB.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
Environmental Science-Nano
·
2021
·Vol. 9
·期 1
·349-360
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IF 8.131
Cailiang Yue,Changqing Zhu,Wenting Zheng,Jinli Qiu,Zhiling Du,Chen Ling,Fu-Qiang Liu
Highly efficient mineralization of refractory organic pollutants is an admittedly difficult problem for most photocatalytic processes. Herein, a hierarchical type-II heterojunction Bi2MoO6/Bi/BiOBr-x (BMO/Bi/BOB-x) was successfully fabricated via a one-pot solvothermal method. The optimal BMO/Bi/BOB-2 exhibited an ∼80% mineralization ratio of ciprofloxacin under simulated solar irradiation, outperforming most reported photocatalysts. ˙OH was demonstrated to be the dominant reactive species. The ˙OH production capacity of BMO/Bi/BOB-2 increased by 76.2% compared with that of BMO/BOB, highlighting the key role of Bi nanoparticles (Bi NPs). Bi NPs not only induced a strong localized surface plasmon resonance effect to enhance the utilization of visible light, but also acted as an electron mediator to accelerate the separation of e−/h+ pairs. Due to the specific redox potential, the separated h+ and e− could activate H2O and O2 to produce ˙OH synchronously. Overall, this work provided a valuable strategy to design a plasmonic Bi NP-enhanced type-II heterojunction for the efficient treatment of refractory organic wastewater.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2020
·Vol. 16
·期 24
·2001417
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IF 11.459
Bin Wang,Yuting Zou,Huanyu Lu,Wenchi Kong,Subhash C. Singh,Chen Zhao,Chaonan Yao,Jun Xing,Xin Zheng,Zhi Yu,Cunzhu Tong,Wei Xin,Weili Yu,Bo Zhao,Chunlei Guo
Triple-cation mixed metal halide perovskites are important optoelectronic materials due to their high photon to electron conversion efficiency, low exciton binding energy, and good thermal stability. However, the perovskites have low photon to electron conversion efficiency in near-infrared (NIR) due to their weak intrinsic absorption at longer wavelength, especially near the band edge and over the bandgap wavelength. A plasmonic functionalized perovskite photodetector (PD) is designed and fabricated in this study, in which the perovskite ((Cs 0.06 FA 0.79 MA 0.15 )Pb(I 0.85 Br 0.15 ) 3 ) active materials are spin-coated on the surface of Au bowtie nanoantenna (BNA) arrays substrate. Under 785 nm laser illumination, near the bandedge of perovskite, the fabricated BNA-based plasmonic PD exhibits ≈2962% enhancement in the photoresponse over the Si/SiO 2 -based normal PD. Moreover, the detectivity of the plasmonic PD has a value of 1.5 × 10 12 with external quantum efficiency as high as 188.8%, more than 30 times over the normal PD. The strong boosting in the plasmonic PD performance is attributed to the enhanced electric field around BNA arrays through the coupling of localized surface plasmon resonance. The demonstrated BNA-perovskite design can also be used to enhance performance of other optoelectronic devices, and the concept can be extended to other spectral regions with different active materials.
研究领域:
材料科学
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光学工程
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 28
·7557-7567
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IF 5.976
Ting-Yang Xing,Jing Zhao,Guo-Jun Weng,Jian-Jun Li,Jian Zhu,Jun-Wu Zhao
By increasing the pH value of the reaction solution and introducing a small amount of ascorbic acid, Ag/Au nanoparticles with small tips and two surface plasmon resonance (SPR) modes have been prepared. The formation of the two SPR modes results from the different shell and core Au/Ag ratios, which relies on the enhanced dealloying rate of the shell and the weakened cavitating rate of the core under high pH conditions. Then, these Ag/Au nanoparticles have been used in the ultrasensitive detection of Hg2+ and Pb2+ based on the resultant absorption intensity decrease of peaks I and II, which originates from the specific dissolution of Ag and the accelerated speed of the reaction between Na2S2O3 and Au, respectively. The results showed an excellent limit of detection (LOD) of 5 nM for Hg2+ and 1.4 nM for Pb2+, and linear ranges from 30 to 400 nM and from 3 to 180 nM, respectively. Meanwhile, we believe that these bimetallic nanoparticles have widespread applications in sensing and modulating pH based on the dealloying rate of the shell and the cavitating rate of the core which can be extended to the synthesis of other dual-functional metallic nanoprobes.
研究领域:
分析化学
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纳米材料科学
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环境监测
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 28
·16028-16034
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IF 3.049
Weiwei Zou,Hao Xie,Yang Ye,Weihai Ni
In many applications, the optical cross sections of gold nanorods (AuNRs) are required to be tailored at a fixed target longitudinal surface plasmon resonance (LSPR) wavelength depending on the excitation source and the photodetector. In this work, we demonstrate the fine tailoring of optical cross sections of AuNRs at a fixed target resonance wavelength, on the basis of AuNR overgrowth using a binary surfactant mixture consisting of 5-bromosalicylic acid (BSA) and cetyltrimethylammonium bromide (CTAB). A systematic study was performed on the sum effects of the BSA concentration and the volume of the growth solution, which gives a formula for quantitative instructions. Based on the formula, we gave examples for the successful synthesis of AuNRs with different optical cross sections at target LSPR wavelengths. From simulation, a nonlinear relationship was further derived to understand the relationship between the aspect ratio and the width of the AuNRs at a target LSPR wavelength for the dimension design of AuNRs. The ratio of optical against physical cross sections was calculated and plotted as a function of the width. The results clearly indicate that AuNRs with a width of 30 nm possess the highest efficiency in terms of optical per physical cross section. Our study provides reliable methods for the synthesis, as well as guidelines for the dimension design of AuNRs, for use in a variety of applications.
研究领域:
纳米材料学
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光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 19
·10958-10965
·
IF 3.049
Yang Zhang,Ruixi Bai,Zhigang Zhao,Qiuxia Liao,Peng Chen,Wanghuan Guo,Chunqing Cai,Fan Yang
In this study, a variety of diglycolic acid-functionalized gold nanoparticle (Au NP) probes are reported, which are highly sensitive for the detection of chromium ions, Cr(VI) ions, at low concentrations in aqueous solutions based on the application of surface plasmon resonance (SPR) theory. Due to its outstanding affinity for Cr(VI) ions, the capped diglycolic acid would induce the aggregation of the NP probes upon encountering them; this was evidenced by the obvious red-shifting of the SPR peak and the enlarged size of the NPs. For the same reason, the selectivity of the probe for Cr(VI) against other heavy metal ions was found to be remarkable. Under optimized conditions, the probe showed the limit of detection (LOD) of 0.32 ppb for Cr(VI) and a linear detection scale ranging from 0.32 ppb to 0.1 ppm. To the best of our knowledge, this is probably the lowest LOD reported for Cr(VI) detection among those of the methods based on SPR.
研究领域:
分析化学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Micro & Nano Letters
·
2018
·Vol. 13
·期 9
·1265-1268
·
IF 0.841
Yufei Sun,Liwei Wang,Junhui Liu,Ruoping Li,Mingju Huang
High-quality gold nanorods (GNRs) with different aspect ratios and uniform morphology were synthesised using the seed-mediated growth method. The GNRs were assembled into two different type superstructures: the one is arranged vertically to the substrate (V-GNR superstructure); the other is arranged parallel to the substrate (P-GNR superstructure). Their work at present is devoted to study the Raman enhancement effect and signal repeatability of GNR superstructures. The influence of GNRs arrangement on surface-enhanced Raman scattering (SERS) was investigated experimentally. In addition, the electromagnetic field coupling of GNR superstructures with different arrangement modes was simulated by the finite-different time-domain method. Both experiments and theories have proved that the required resonance wavelength of Raman laser can be obtained by adjusting the aspect ratio of GNRs. Furthermore, the P-GNR superstructure can bring high and repeatable SERS signal intensity of molecules compared with V-GNR superstructure and other nanostructures. It can be concluded that P-GNR superstructure is a good substrate mode for SERS technique.
研究领域:
纳米技术
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光学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nano-Micro Letters
·
2015
·Vol. 8
·期 1
·36-43
·
IF 1.975
Zhang Diming,Zhang Qian,Lu Yanli,Yao Yao,Li Shuang,Jiang Jing,Liu Gang Logan,Liu Qingjun
In this study, a nanobiosensor for detecting explosives was developed, in which the peptide was synthesized with trinitrotoluene (TNT)-specific sequence and immobilized on nanodevice by Au–S covalent linkage, and the nanocup arrays were fabricated by nanoimprint and deposited with Au nanoparticles to generate localized surface plasmon resonance (LSPR). The device was used to monitor slight change from specific binding of 2,4,6-TNT to the peptide. With high refractive index sensing of ~10 4 nm/RIU, the nanocup device can detect the binding of TNT at concentration as low as 3.12 × 10 −7 mg mL −1 by optical transmission spectrum modulated by LSPR. The nanosensor is also able to distinguish TNT from analogs of 2,4-dinitrotoluene and 3-nitrotoluene in the mixture with great selectivity. The peptide-based nanosensor provides novel approaches to design versatile biosensor assays by LSPR for chemical molecules.
研究领域:
生物传感
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纳米技术
·
化学检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）