MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 4
·1-9
·
IF 5.833
Li Li,Li Siqun,Yu Xinjie,Chen Zhengbo
A colorimetric sensing method is described for discrimination of multiple antioxidants based on core-shell Au@Ag nanocubes (NCs). In order to extract data-rich colorimetric responses from the sensor array, three different concentrations of chloroaurate acid (HAuCl 4 ) were employed as sensing elements. Interestingly, Au 3+ ions can be reduced to different valence states (i.e., Au(0) and Au(I)) by different antioxidants, and thus effectively inhibit the oxidation etching process of Au@Ag NCs by Au(III) ions to varying extents, generating diverse colorimetric responses (color and absorbance). This enables identification of the six antioxidants at 10 nM via linear discriminant analysis (LDA) with relative standard deviation (RSD) of 2.52% ( n = 3). The discrimination ability of the sensor array was further evaluated in antioxidant binary and multicomponent mixtures. Remarkably, identification of these six antioxidants spiked in urine was realized with 100% of accuracy. Graphical abstract
Schematic presentation of colorimetric assay for antioxidants based on three chloroauric acid/Au-Ag nanocubes.
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PubMed
高影响因子
SENSORS
·
2021
·Vol. 21
·期 7
·2300
·
IF 3.576
Tao Li,Zhinan Yu,Zhengkun Wang,Yong Zhu,Jie Zhang
A tapered fiber decorated by Ag nanoparticles is prepared as a surface-enhanced Raman scattering (SERS) substrate. There are two key parameters during the preparation process, the fiber cone angle and the density of decorated AgNPs on the fiber tip surface. Their theoretical analysis on the forming mechanism and the optimization process is studied in detail. The tapered fibers with angles from 0.5 to 30° are successfully prepared, with a chemical method in a small tube using a bending interface. AgNPs with different densities are decorated on the surface of the tapered fibers with an electrostatic adsorption method. The optimized tapered fiber SERS probe with an angle of 12° and AgNPs density of 26.67% provides the detection of Rhodamine 6G (R6G) with 10−10mol/L.Keywords:Raman scattering;tapered fiber;cone angle;AgNPs
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jin-Li Qiu,Jian Su,Nisar Muhammad,Wen-Ting Zheng,Cai-Liang Yue,Fu-Qiang Liu,Jing-Lin Zuo,Ze-Jun Ding
A facile and efficient synthetic strategy was used to prepare a silver nanoparticles-doped MOF (Ag NPs@Zr-TTFTB, TTFTB = tetrathiafulvalene tetrabenzoate) catalyst. Considering the stability of Zr 6 cluster-based MOFs and the confinement of small Ag NPs (below 5 nm), title hybrids can be used for the photocatalytic degradation of sulfamethoxazole (SMZ). The prepared Ag NPs@Zr-TTFTB were found to efficiently remove SMZ (k = 0.009 min −1 ) and remain active in the wide range of pH values (3.0 ~ 9.0) and four cycles. The leaching amount of Ag and Zr under different pH values were only accounted for 0.18% ~ 0.61% and 0.01% ~ 0.05% of used Ag NPs@Zr-TTFTB, respectively, which indicated its excellent stability. Studies on the catalytic mechanism revealed that the proposed heterostructure of Ag NPs and Zr-TTFTB led to the electron transfer and the generation of active oxygen species, resulting in its remarkable photocatalytic activities.
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iScience
·
2022
·
IF 6.107
Gan Miao,Fangchao Li,Zhongshuai Gao,Ting Xu,Xiao Miao,Guina Ren,Yuanming Song,Xiangming Li,Xiaotao Zhu
Engineering a versatile platform that enables to separate both oil/water and oil/oil mixtures and remove dye from water is not easy. To address this challenge, we have developed an Ag/polydopamine-coated textile (Ag/PDA@textile) by chemically depositing Ag particles on the textile surface using polydopamine as the binder layer. The obtained Ag/PDA@textile attracts water but repels oil in the air, underwater, and when immersed into the oil. Exploiting its water-attracting and oil resistance, the Ag/PDA@textile is acted as a separation membrane to separate oil/water mixtures with enhanced separation efficiency. The Ag/PDA@textile also possesses opposite wetting behavior to oils with different polarities, allowing it to separate oil/oil mixtures efficiently. Thanks to the catalytic performance of the Ag particle, organic dyes can be decomposed effectively by our Ag/PDA@textile under UV illustration or in the presence of NaBH 4 . Our Ag/PDA@textile may be valuable for applications in water purification and oil sewage treatment.
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PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Liang-Liang Wu,Li-Ying Wang,Zheng-Jun Xie,Na Pan,Chi-Fang Peng
This paper reported that the peroxidase-like activity of DNA-Ag/Pt nanoclusters (NCs) can be inhibited significantly by l -cysteine. Based on this finding, a highly sensitive and selective colorimetric detection for l -cysteine was developed with a detection limit (LOD) of 2.0 nM and a linear range from 5.0 nM to 500 nM. This detection for l -cysteine was highly selectivity over other amino acids . The high sensitivity and selectivity of this method facilitated the detection of l -cysteine in biological samples. Moreover, this method developed here was low-cost and simple. These results indicated the excellent analytical application of Ag/Pt NCs as enzyme mimic .
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高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Wenhui Wang,Ting He,Xuehua Liu,Weina He,Hengjiang Cong,Yangbin Shen,Liuming Yan,Xuetong Zhang,Jinping Zhang,Xiaochun Zhou
Hydrogen is regarded as a future sustainable and clean energy carrier. Formic acid is a safe and sustainable hydrogen storage medium with many advantages, including high hydrogen content, nontoxicity, and low cost. In this work, a series of highly active catalysts for hydrogen production from formic acid are successfully synthesized by controllably depositing Pd onto Ag nanoplates with different Ag nanofacets, such as Ag{111}, Ag{100}, and the nanofacet on hexagonal close packing Ag crystal (Ag{hcp}). Then, the Pd–Ag nanoplate catalysts are supported on Vulcan XC-72 carbon black to prevent the aggregation of the catalysts. The research reveals that the high activity is attributed to the formation of Pd–Ag alloy nanofacets, such as Pd–Ag{111}, Pd–Ag{100}, and Pd–Ag{hcp}. The activity order of these Pd-decorated Ag nanofacets is Pd–Ag{hcp} > Pd–Ag{111} > Pd–Ag{100}. Particularly, the activity of Pd–Ag{hcp} is up to an extremely high value, i.e., TOF{hcp} = 19 000 ± 1630 h–1 at 90 °C (lower limit value), which is more than 800 times higher than our previous quasi-spherical Pd–Ag alloy nanocatalyst. The initial activity of Pd–Ag{hcp} even reaches (3.13 ± 0.19) × 106 h–1 at 90 °C. This research not only presents highly active catalysts for hydrogen generation but also shows that the facet on the hcp Ag crystal can act as a potentially highly active catalyst.
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高影响因子
OPTICS EXPRESS
·
2022
·Vol. 30
·期 18
·32509-32527
·
IF 3.833
Fengrui Li,Baojie Shan,Xiaofei Zhao,Chang Ji,Zhen Li,Jing Yu,Shicai Xu,Yang Jiao,Yang Jiao,Chao Zhang,Baoyuan Man,Baoyuan Man
The coordination of piezoelectric and plasmonic effects to regulate the separation and migration of photo-generated carriers is still a significant method to improve the performance of visible-light photoresponse. Herein, we propose the PVDF@Ag-ZnO/Au composite nanofiber membranes utilizing the piezoelectric and plasmonic effects to promote the photocatalytic degradation of organic dyes. Here, ZnO nanorods can generate a built-in electric field under vibration to separate electron-hole pairs. The Schottky junction formed by noble metal/semiconductor can not only inhibit the recombination of photo-generated carriers and accelerate the migration of carriers, but also enhance the utilization of visible light. In addition, the structure has excellent flexibility and easy recycling characteristics. We demonstrate that the plasmonic effect of noble metal can enhance the light response of membranes and broaden light absorption from ultraviolet to visible light region. With the help of the surface-enhanced Raman scattering (SERS), modulation effects of the piezoelectric effect on light response is proved. For catalytic processes, rhodamine B (98.8%) can be almost completely degraded using PVDF@Ag-ZnO/Au within 120 minutes in the piezoelectric photocatalysis process, which is 2.2 and 2.8 times higher than photocatalysis and piezoelectric catalysis, respectively. This work provides a promising strategy for harnessing solar and mechanical energy.
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高影响因子
Materials
·
2023
·Vol. 16
·期 5
·1973
·
IF 3.4
Yuyi Zhang,Chengjun Liu,Xingyu Liu,Ziyu Wei,Hui Tao,Feng Xu,Lixi Wang,Jiangyong Pan,Wei Lei,Jing Chen
Upconversion devices (UCDs) have motivated tremendous research interest with their excellent potential and promising application in photovoltaic sensors, semiconductor wafer detection, biomedicine, and light conversion devices, especially near-infrared-(NIR)-to-visible upconversion devices. In this research, a UCD that directly turned NIR light located at 1050 nm into visible light located at 530 nm was fabricated to investigate the underlying working mechanism of UCDs. The simulation and experimental results of this research proved the existence of the quantum tunneling phenomenon in UCDs and found that the quantum tunneling effect can be enhanced by a localized surface plasmon.
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高影响因子
RSC Advances
·
2021
·Vol. 11
·期 24
·14730-14736
·
IF 3.361
Jing Li,Fengmei Cheng,Haidong Li,Hongwen Zhang,Gang Wang,Daocheng Pan
Silver nanowire (AgNW) networks play an important role in the transparent conductive electrodes or antistatic coatings. In this work, we describe a facile two-step method to fabricate AgNWs/Zn2SnO4 composite films. Long AgNWs with a high aspect ratio were prepared through a modified polyol method, in which the organic octylamine hydrochloride rather than the commonly used inorganic chlorides was used as the shape-controlling agent. The AgNW networks were fabricated on the glass substrate, on which the Zn2SnO4 film was deposited, forming robust AgNWs/Zn2SnO4 composite films. The as-prepared composite films have strong adhesion, high thermal stability, low sheet resistance (5–15 ohm sq−1) and high light transmittance (85–80%), indicating a promising application prospect for transparent conductive electrodes and antistatic coatings.
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高影响因子
DYES AND PIGMENTS
·
2015
·
IF 3.966
Penghuai Niu,Baocang Liu,Yingjun Li,Qin Wang,Alideertu Dong,Heting Hou,Li Zhang,Yuxi Gao,Jun Zhang
This paper developed a facile method to synthesize CdTe@SiO 2 /Ag nanocomposites by coupling uniform Ag nanoparticles on core–shell CdTe@SiO 2 quantum dots via simple impregnation of CdTe@SiO 2 functionalized with amino groups in Ag nanoparticle sols. The obtained CdTe@SiO 2 /Ag nanocomposites show efficient fluorescence and effective antibacterial activities. Besides, because of the existence of SiO 2 , the CdTe@SiO 2 /Ag nanocomposites manifest strong adhesive affinity and chemical stability, allowing the long-term preservation of fluorescence and affording affinity with latent fingerprints. Thus, the CdTe@SiO 2 /Ag nanocomposites are explored as alternative fluorescent markers for latent fingerprint detection to provide better resolution, high sensitivity, and antibacterial activities. Meanwhile, the CdTe@SiO 2 /Ag nanocomposites may be used as alternative fluorescent markers for enhanced latent fingerprint detection on a variety of object surfaces in criminal science for individual identification.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yingdong Hao,Yingxiao Wang,Pengyu Chen,Lu Chen,Wei Wei,Nannan Sun
Photocatalytic oxidation of methane (CH 4 ) to value-added chemicals offers a sustainable and promising approach for chemical synthesis, however, efficient catalysts for the activation of inert C H bonds remain challenging. Herein, a novel Ag-AgCl biphasic composite was used as co-catalysts to modify ZnO semiconductor (Ag-AgCl/ZnO-z). Structure properties and catalytic performance in photocatalytic oxidation of CH 4 of the sample were systematically investigated, together with comparison with pure ZnO (ZnO-z) and a single Ag modified counterpart (Ag/ZnO-z). It was found that Ag-AgCl/ZnO-z was enriched with heterogeneous interfaces, which facilitated ultrafast carrier transport and their prolonged separation. Interestingly, AgCl acted as a hole acceptor, and the lattice Cl can be directly activated to •Cl, which is then responsible for forming a new •CH 3 formation pathway via a hydrogen atom transfer (HAT) mechanism. Moreover, a Cl-looping process can be established so that the catalyst remained stable during cyclic reactions. Under the optimum conditions, an excellent liquid oxygenates productivity of 12,731 μmol·g −1 ·h −1 was achieved. This work presents a prototype for designing biphasic composite co-catalysts, thereby offering valuable insights into introducing multiple CH 4 activation pathways.
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产品关联
DOI
高影响因子
IEEE SENSORS JOURNAL
·
2024
·
IF 4.3
Jingxuan Wu,Yu Wan,Zhenxing Wang,Yimu Wang,Qingsong Luo,Changhao Feng,Tatsuo Yoshinobu
The efficient and reliable monitoring of acetic acid (CH3COOH) is significant to environmental protection and human healthcare. LaFeO3 is a potential sensing material for CH3COOH with its good sensitivity and high plasticity. To further improve the sensing properties of LaFeO3 to meet the requirements of applications, we successfully utilized the facile electrospinning technique to fabricate a series of CH3COOH-sensitive Ag-doped (0–5 mol%) LaFeO3 nanotubes. The systematic characterization shows that the appropriate content (4 mol%) of Ag doping can effectively ameliorate the material morphology to realize loose porous structures. Meanwhile, the sensitization effect of Ag and ameliorated morphology significantly enhance the gas-sensing properties of LaFeO3 to CH3COOH vapor. The optimal Ag-doped LaFeO3 (4 mol%) loose nanotubes-based gas sensor results in a detection limit of 0.5 ppm and 3.6-fold enhancement of the response to 100-ppm CH3COOH compared with the pure LaFeO3 compact nanotubes at a low operating temperature (150 °C). It also exhibits excellent selectivity to CH3COOH and good long-term stability. Therefore, Ag-doped LaFeO3 can be regarded as a promising material for sensing CH3COOH in practical applications. Finally, the mechanism of enhanced gas-sensing properties is discussed.
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