Nanoscale Research Letters
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2018
·Vol. 13
·期 1
·1-8
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IF 3.125
Lu Junlin,Shang Chaoqun,Meng Qingguo,Lv Haiqin,Chen Zhihong,Liao Hua,Li Ming,Zhang Yongguang,Jin Mingliang,Yuan Mingzhe,Wang Xin,Zhou Guofu
A series of novel visible light driven all-solid-state Z-scheme BiOBr 0.3 I 0.7 /Ag/AgI photocatalysts were synthesized by facile in situ precipitation and photo-reduction methods. Under visible light irradiation, the BiOBr 0.3 I 0.7 /Ag/AgI samples exhibited enhanced photocatalytic activity compared to BiOBr 0.3 I 0.7 and AgI in the degradation of methyl orange (MO). The optimal ratio of added elemental Ag was 15%, which degraded 89% of MO within 20 min. The enhanced photocatalytic activity of BiOBr 0.3 I 0.7 /Ag/AgI can be ascribed to the efficient separation of photo-generated electron–hole pairs through a Z-scheme charge-carrier migration pathway, in which Ag nanoparticles act as electron mediators. The mechanism study indicated that ·O 2 − and h + are active radicals for photocatalytic degradation and that a small amount of ·OH also participates in the photocatalytic degradation process.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
TALANTA
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2017
·
IF 4.162
Bing Zhang,Xue Wang,Yanling Zhao,Jia Lv,Hongyun Meng,Honghong Chang,Hui Zhang,Wenlong Wei
Visual detection of tumor markers with accuracy and selectivity exhibits significant advantages for cancer early diagnosis due to its low-cost and simple analytical instruments. Herein, a highly photosensitive colorimetric immunoassay for carcino embryonie antigen (CEA, as a model) detection based on Cu 2+ doped Ag-AgI nanocomposite was constructed. First, Cu 2+ doped Ag-AgI nanocomposite (Cu 2+ /Ag-AgI) owned the ability of oxidization of TMB was synthesized by impregnation method, which was characterized by transmission electron microscope (TEM), scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray powder diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (DRS) and X-ray photoelectron spectroscopy (XPS). Second, based on sandwich-type immunoassay, the immunocomplex was built on the surface of magnetic bead by utilizing Cu 2+ /Ag-AgI as labels. The blue color of TMB ox was obtained under visible irradiation and ultraviolet spectrum scanning was carried out in ABS buffer solution. Under optimal conditions, the absorbance values increased with the increasing of CEA concentrations in sample with the linearity range of 1.0 pg mL −1 −5.0 ng mL −1 . The detection limit was 0.13 pg mL −1 . More importantly, the developed colorimetric immunoassay exhibited good selectivity, repeatability, stability and possible applications in the real serum sample analysis.
研究领域:
生物医学工程
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肿瘤学
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DOI
PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
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2014
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IF 1.968
Yunfang Chen,Jianzhang Fang,Shaoyou Lu,Yan Wu,Dazhi Chen,Liyan Huang,Weicheng Xu,Ximiao Zhu,Zhanqiang Fang
In this work, a new plasmonic photocatalyst Ag/AgI/BiOI-rectorite was prepared via a cation exchange process. The photocatalyst had been characterized by X-ray powder diffraction (XRD), Raman spectra, nitrogen sorption (BET), field-emission scanning electron microscope (FE-SEM), X-ray photoelectron spectroscopy (XPS) and UV–vis diffuse reflectance spectroscopy (DRS). The photocatalytic activity, which was evaluated by degradation of rhodamine B (RhB) and bisphenol A (BPA) under visible light irradiation, was enhanced significantly by loading Ag/AgI/BiOI nanoparticles onto rectorite . The photogenerated holes and superoxide radical ( O 2 − ) were both formed as active species for the photocatalytic reactions under visible light irradiation. The existence of metallic Ag particles, which possess the surface plasmon resonance effect, acted as an indispensable role in the photocatalytic reaction.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
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2017
·Vol. 28
·期 3
·805-811
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IF 1.577
Song Bing,Tang Qingjie,Wu Wenrong,Zhang Huoli,Cao Jianliang,Ma Mingjie
Novel Z-scheme Ag/AgI/AgBr/sulfonated polystyrene composite is prepared via ion-exchange followed by light reduction. The photocatalytic activities of as-synthesized samples are evaluated through the degradation of methyl orange (RhB) under visible light irradiation. The Z-scheme Ag/AgI/AgBr/SPs photocatalysts display excellent photocatalytic activity and stability compared with Ag/AgI and Ag/AgBr. The improved photocatalytic activity is mainly due to the combined effects of the Z-scheme structure of Ag/AgI/AgBr/SPs and the strong surface plasmon resonance effect of Ag 0 nanoparticles. Moreover, after four successive cycles, the Ag/AgI/AgBr/SPs photocatalysts have no obvious loss of activity for the degradation of RhB, illustrating that the Z-scheme Ag/AgI/AgBr/SPs photocatalysts are rather stable under visible-light irradiation.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
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2021
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IF 10.618
Keqin Deng,Jing Xiao,Zhang Liu,Chunxiang Li,Jinglun Wang,Qingfeng Yi,Haowen Huang,Hu Zhou
ABSTRCT Photocathode-based assay is anti-interference for real sample detection . Photocathode produces low photocurrent signal and gives rise to poor sensitivity. Herein, a novel cathode photoelectrochemical (CPEC) sensing platform based on Ag-AgI-CNTs as photocathode material and K 3 [Fe(CN) 6 ] as photoelectron acceptor was established. Since [Fe(CN) 6 ] 3- effectively accepted photoelectrons from Ag-AgI-CNTs, it greatly enhanced the CPEC response. Combining a surface multisite strand displacement amplification (SMSDA) strategy, the CPEC platform was applied for the activity assay of terminal deoxynucleotidyl transferase (TdT). In this proposal, oligo dT primer tethered on CPEC platform was in-situ extended to generate a polyA tail. Then the polyA tail formed a stable multi-point hybrid structure with the adjacent oligo dT. After launching the SMSDA, the CPEC platform was covered by more elongated polynucleotide chains and network, which acutely hampered the photoelectron transfer (eT) between photocathode and electron acceptor and caused a reduced photocurrent. The CPEC sensor possessed a satisfactory linear response from 6 × 10 -5 -0.1 U and a low detection limit of 1.1 × 10 -5 U. The strategy offered a more specific and sensitive method for TdT activity assay . It was feasible in the field of TdT-based biochemical research, drug screening, and disease diagnosis.
研究领域:
生物化学
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分析化学
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分子生物学
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DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
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IF 14.229
Boran Xu,Yandong Li,Yangqin Gao,Shuang Liu,Da Lv,Sujun Zhao,Hang Gao,Guoqing Yang,Ning Li,Lei Ge
A novel plasmonic photocatalysts of Ag-AgI/Bi 3 O 4 Cl was successfully synthesized via a simple and mild wet-chemical process. The 30 wt% Ag-AgI/Bi 3 O 4 Cl photocatalyst showed the highest photocatalytic activity for degradation of methyl orange (MO) under visible light (5 W LED lamp), which represents a 3.2 and 7.4 times enhancement in the photocatalytic degradation efficiency as compared to pure Bi 3 O 4 Cl and Ag-AgI, respectively. The surface plasmon resonance (SPR) effect of Ag nanoparticles (NPs) was detected by the UV–vis diffusion reflectance spectroscopy (DRS) and surface photovoltage (SPV) measurement, finding that the SPR effect of Ag extends the absorption and photo-response range in the Ag-AgI/Bi 3 O 4 Cl composite photocatalyst. Based on the analysis of electron spin resonance (ESR), linear sweeping voltammetry (LSV) characterization results, three electron transfer processes were proposed: AgI CB → Bi 3 O 4 Cl CB , AgI CB → Ag and methyl orange → Ag. Such electron transfer paths can not only effectively improve the separation efficiency of photo-generated carriers, but also ensure the stability of the catalyst. This study can provide a novel insight for modification of other desirable semiconductor materials to achieve high photocatalytic activity.
研究领域:
材料科学
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环境化学
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物理化学
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纳米催化
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半导体光催化
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DOI
高影响因子
危险品化学品经营许可证（带存储）