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Chinese Chemical Letters 2018年第3期29卷 456-460页

作者： Mengni Zhang Jia Jia Ke Huang xiandeng hou Chengbin Zheng Key Laboratory of Green Chemistry & Technology of MOE College of Chemistry Sichuan University College of Materials and Chemistry & Chemical Engineering Chengdu University of Technology College of Chemistry and Material Science Sichuan Normal University

Although large amounts of engineered nanomaterials have been used for the arsenic removal, today there still remains several serious impediments to its further application, including consumption of expensive and pure salts, and only application for the removal of inorganic arsenic. In this work, we developed an eco-economic and facile electrochemical method to synthesize iron porous coordination polymers （FePCPs） for the simultaneous removal of inorganic and organic arsenic from natural water.

关键词： Electrochemical synthesis Iron porous coordination polymer Arsenic removal

One-step synthesis of monodispersed Pt nanoparticles anchored on 3D graphene foams and its application for electrocatalytic hydrogen evolution

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Chinese Chemical Letters 2020年第6期31卷 1540-1544页

作者： Dan Zhou Bei Jiang Rui Yang xiandeng hou Chengbin Zheng Key Laboratory of Green Chemistry and Technology Ministry of EducationCollege of ChemistrySichuan UniversityChengdu 610064China Analytical&Testing Center Sichuan UniversityChengdu 610064China

Although platinum-based materials are regarded as the state-of-the-art electro-catalysts for hydrogen evolution reaction(HER),high cost and quantity scarcity hamper their scale-up utilization in industrial ***,a one-step strategy was developed to synthesize multi-walled carbon nanotubes and reduced graphene oxide supported Pt nanoparticle hydrogel(PtNP/rGO-MWCNT),in which only ascorbic acid was used as the reductant for one-pot reduction of both GO and chloroplatinic *** hydrogel can be directly used as a flexible binder-free catalytic electrode to achieve high performance of *** to conventional strategies,the current strategy not only significantly reduces the Pt loading to 3.48 wt%,simplifies the synthesis process,but also eliminates the use of any polymer binders,thus decreasing the series resistance and improving catalytic *** overpotential of only 11 mV was achieved on as-prepared PtNP/rGO-MWCNT to drive a geometrical current density of 10 mA/cm2 in0.5 mol/L H2 SO4,with its catalytic activity being kept over 15 *** acidic medium,the HER activity of the PtNP/rGO-MWCNT catalyst exceeds most of the reported Pt-based electro-catalysts and is 3-fold higher than that obtained on commercial Pt/C electrode.

关键词： Pt-based electrocatalyst Hydrogen evolution Multi-walled carbon nanotube Reduced graphene oxide hydrogel Energy crisis Environmental pollution

Simultaneous extraction of level 2 and level 3 characteristics from latent fingerprints imaged with quantum dots for improved fingerprint analysis

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Chinese Chemical Letters 2017年第10期28卷 1961-1964页

作者： Yuqin Li Chaoying Xu Chang Shu xiandeng hou Peng Wu Analytical & Testing Center Sichuan University Department of Forensic Medicine North Sichuan Medical College School of Communication and Information Engineering University of Electronic Science and Technology of China

Fingerprints are unique and life-long to everyone, so they occupy very important statuses in forensic science. However, due to the limit of current imaging technologies and instruments, recognition and matching of fingerprints are mostly based on their level 2 structures（bifurcation, crossover, and etc.）.Moreover, in real-world cases, fingerprints collected in the field are often incomplete or damaged, which adds further difficulty in fingerprint analysis. Quantum dots（QDs） are superior fluorescent imaging agents for latent fingerprints, which can provide both level 2 and level 3（sweat pores） details. Here, we used red-emitting N-acetylcysteine-capped Cd Te QDs as imaging agent for staining of eccrine LFPs. The numbers of level 2 and level 3 features that can be mapped are significantly larger than those obtained by cyanoacrylate fuming, a standard technique being adopted at forensic scene. Therefore, the level 2 and level 3 characteristics from QD-staining were simultaneously extracted for improved fingerprint analysis.A preliminary fingerprint matching based modified Pore Matching algorithm was thus developed based on the integration of both level 2 and level 3 characteristics. Satisfactory results of fingerprint matching were obtained, demonstrating the advantage of the QD-staining for advanced fingerprint analysis.

关键词： Quantum dots Latent fingerprints Sweat pore Fluorescent imaging Fingerprint matching

Exploration of nano-surface chemistry for spectral analysis

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Chinese Science Bulletin 2013年第18期58卷 2017-2026页

作者： LI ChengHui LIU Rui Lü Yi hou xiandeng WU Peng College of Chemistry Sichuan University Analytical & Testing Center Sichuan University

The applications of nano-surface chemistry in the field of spectral analysis have attracted growing interest in recent *** this article,we reviewed the applications of nanomaterials-based chemical reactions for spectral analysis,including the development in plasma-catalysis,surface-enhanced spectroscopy,separation and preconcentration,chemical vapor generation,labeling and signal *** of nano-surface chemistry to spectral analysis not only improves the sensitivity and selectivity,broadens the application range of spectral analysis,but also affords analytical community special characterization tools.

关键词：纳米材料光谱分析表面化学频谱分析等离子体催化化学领域化学反应表面增强

Reduction of mercury(Ⅱ)by electrons contained in carbon dots:An environmentally friendly cold vapor generation for mercury analysis

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Chinese Chemical Letters 2020年第10期31卷 2678-2682页

作者： Tao Chen Yao Lin Haochen Li Rui Yang xiandeng hou Baozhan Zheng Chengbin Zheng Key Laboratory of Green Chemistry and Technology Ministry of EducationCollege of ChemistrySichuan UniversityChengdu 610064China Chengdu No.7 High School Chengdu 610041China Analytical&Testing Center Sichuan UniversityChengdu 610064China

In this work,the reduction of mercury ions(Hg2+)to elemental mercury(Hg0)was easily achieved using highly reductive carbon dots(r-CDs),which synthesized from sucrose by a simple and cost-effective *** a careful mechanistic study,the reduction was probably accomplished with the large numbers of electrons contained in r-CDs rather than the oxidation of its functional ***,a3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide(MTT)assay showed that the r-CDs were nontoxic to wildlife and human ***,the r-CDs were used as an alternative to toxic reductants(SnCl2 or NaBH4)for the sensitive and in situ determination of mercury by cold vapor gene ration(CVG)coupled to a miniature point discharge optical emission spectrometer(μPD-OES).Limit of detection of 0.05μg/L was obtained for Hg2+,with relative standard deviation(RSD)less than 5.4%at a concentration of 5μg/*** accuracy of r-CDs induced CVG-μPD-OES was validated by the determination of mercury in a certified reference material(DOLT-5,dogfish liver)and five natural water samples collected from different rivers and lakes in Chengdu City,Since r-CDs are nontoxic and prepared from abundant and inexpensive sucrose,the r-CDs induced CVG-μPD-OES retains the great potential for the inexpensive and enviro nmentally friendly field analysis of mercury in natural *** accuracy of the proposed method was validated by the analysis of a certified reference material and several water samples with satisfactory results.

关键词： Mercury analysis Reduction Carbon dots Cold vapor generation

Sharing one ICP source for simultaneous elemental analysis by ICP-MS/OES: some unique instrumental capabilities

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Sharing one ICP source for simultaneous elemental analysis b...

第三届全国质谱分析学术报告会

作者： Yujia DENG Xi WU Yunfei TIAN Zhirong ZOU xiandeng hou Xiaoming JIANG Analytical & Testing Center Sichuan University College of Chemistry Sichuan University

Inductively coupled plasma（ICP） is one of the most popular sources in analytical atomic spectrometers, including inductively coupled plasma mass spectrometry（ICP-MS） and inductively coupled plasma optical emission spectrometry（ICP-OES）. There are several unique independent advantages for either of them. Therefore, a simultaneous elemental analysis system was established as shown in Figure 1. for synergetic work of ICP-MS and ICP-OES by sharing one ICP to improve the analytical figures of merit. To demonstrate its unique utility, several special applications were studied, including correction of interferences for each other, synergetic determination for accurate analysis and combinatorial analysis for larger inear ranges of calibration curves.

关键词： Inductively coupled plasma Mass spectrometry Optical emission spectrometry Simultaneous determination Trace elements

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重组酶聚合酶扩增:扩增原理及性能分析

高等学校化学学报 2020年第12期41卷 2587-2597页

作者：李显明郑婷高露李峰侯贤灯吴鹏四川大学分析测试中心四川大学化学学院成都610064

脱氧核糖核酸(DNA)放大技术对于核酸检测(NAT)至关重要.聚合酶链式反应(PCR)虽然是核酸检测的基准扩增技术,但其主要适用于条件较好的中心实验室.重组酶聚合酶扩增(RPA)是一种非常有潜力的等温扩增技术,对仪器设备依赖性小,适用于资源... 详细信息

脱氧核糖核酸(DNA)放大技术对于核酸检测(NAT)至关重要.聚合酶链式反应(PCR)虽然是核酸检测的基准扩增技术,但其主要适用于条件较好的中心实验室.重组酶聚合酶扩增(RPA)是一种非常有潜力的等温扩增技术,对仪器设备依赖性小,适用于资源贫乏地区.因此,该技术在核酸检测时不受实验场所限制,非常适合即时检测(POCT).作为一种正在快速发展的扩增技术,RPA也存在阻碍其进一步发展的缺陷.本文对RPA的扩增原理和扩增性能进行了总结,重点讨论了对扩增性能至关重要的引物重组和ATP动态平衡调控过程,并概述了RPA存在的缺陷和潜在的解决方向.

关键词：重组酶聚合酶扩增脱氧核糖核酸诊断即时检测

Copper Ion Assisted Photochemical Vapor Generation of Chlorine for Its Sensitive Determination by Sector Field Inductively Coupled Plasma Mass Spectrometry

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Copper Ion Assisted Photochemical Vapor Generation of Chlori...

Construction of DNAzyme motor and its application to clinical diagnosis

中国化学会第十三届全国分析化学年会

作者： Jing Hu Ralph E.Sturgeon Kenny Nadeau xiandeng hou Chengbin Zheng Lu Yang Analytical & Testing Center Sichuan University National Research Council Canada Key laboratory of Green Chemistry and Technology and MOE College of Chemistry Sichuan University

A novel,reliable,and sensitive approach for the determination of chlorine by sector field inductively coupled plasma mass spectrometry (SF-ICPMS) using photochemical vapor generation for sample introduction is *** chloride is generated from different chlorine species in a flow through photochemical reactor using a 1%solution of acetic acid containing 7.5μg g of *** volatile product is directed by an argon carrier gas to a gas-liquid separator and introduced into the instrument.A sample flow rate at 1.7 mL min and a 45 s irradiation time provided a 74-fold enhancement in sensitivity compared to conventional nebulization.A blank-limited detection limit of 0.5 ng g for chloride,suitable for quantitation at trace levels,was *** proposed method was validated by analysis of two certified reference materials,NIST SRM 1568b rice flour and SRM 1571 orchard leaves,with satisfactory results,as well as three varieties of bottled water,achieving spike recoveries between 101%and 105%.

关键词： Cu(Ⅱ) photochemical vapor generation chloride ICP-MS

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Construction of DNAzyme motor and its application to clinica...

氢化物发生-介质阻挡放电光谱分析法测定无机汞和甲基汞

中国化学会第十三届全国分析化学年会

作者： Junbo Chen Peng Yang Huan Du Xing-Fang Li X.Chris Le xiandeng hou Hongquan Zhang Analytical & Testing Centre Sichuan University Department of Laboratory Medicine and Pathology Faculty of Medicine and Dentistry University of Alberta College of Chemistry Sichuan University

We report here the concept and operation of a self-powered, target-triggered DNA motor constructed by engineering a DNAzyme to adapt into binding-induced DNA assembly. Binding of a target molecule to the two ligands induced hybridization between the DNAzyme and its substrate on the Au NP that are otherwise unable to spontaneously hybridize. The binding-induced association of the DNAzyme with the substrate on the AuNP activated the DNAzyme, initiating the cleavage of the substrate and the autonomous movement of the DNAzyme along the tracks on the AuNP. A simple addition or depletion of the cofactor Mg enabled fine control of the DNAzyme motor. The autonomous movement, fueled by DNAzyme-catalyzed substrate cleavage, was monitored fluorescently in real time. A single binding event resulted in the movement of the motor by more than one hundred steps. Simply altering the ligands enabled the motor to specifically respond to any target or particular sequences of nucleic acids, as demonstrated by three binding systems.

关键词：

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实验技术与管理 2019年第2期36卷 80-84页

作者：李成辉蒋小明侯贤灯四川大学分析测试中心四川成都610064

利用介质阻挡放电(DBD)低温等离子体发射光谱分析法,结合氢化物发生进样方式,建立了一种简单、快速、绿色的痕量汞的非色谱形态分析方法。利用不同形态的汞在介质阻挡放电中发射光谱的差异,通过253.7nm处汞的发射线定量总汞含量,自由基C... 详细信息

利用介质阻挡放电(DBD)低温等离子体发射光谱分析法,结合氢化物发生进样方式,建立了一种简单、快速、绿色的痕量汞的非色谱形态分析方法。利用不同形态的汞在介质阻挡放电中发射光谱的差异,通过253.7nm处汞的发射线定量总汞含量,自由基CN的特征发射线定量甲基汞,再通过差减法计算出无机汞含量,实现了简单、廉价、快速、绿色的汞的非色谱形态分析方法。通过该实验的设计与实施锻炼学生科学研究的方法和思维能力。

关键词：汞含量介质阻挡放电氢化物发生发射光谱分析形态分析