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Journal of Analysis and Testing 2021年第1期5卷 60-68页

作者： Zhiwei Lai fangyuan lin Yipeng Huang Yiru Wang Xi Chen MOE Key Laboratory of Spectrochemical Analysis and Instrumentation College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China State Key Laboratory of Marine Environmental Science Xiamen UniversityXiamen 361005China

An electrochemical flow device has been developed for the determination of heavy metal ions(HMI)in water using multiwalled carbon nanotubes(MWCNTs)/Nafion(NA)/Hg electrode,by mean of diff erential pulse anodic stripping voltammetry coupled with sequential injection *** accuracy of the determination was ensured by the great electrical conductivity of MWCNTs and the high adsorption capacity of *** was used for MWCNTs immobilization for the long-term application of the *** mercury film was cleaned after determination and another one would form during deposition.A lower limit of detection and a wider determination range of Cd^(2+)and Pb^(2+)could be achieved using the automatically analytical device combining with the MWCNTs/NA/Hg-modified *** real-time monitoring of Cd^(2+)and Pb^(2+)in fresh water using this device continued for 10 *** results indicated that the method was potential for on-site and real-time determination of HMI in water samples.

关键词： Electrochemical flow device Differential pulse anodic stripping voltammetry Cd^(2+) Pb^(2+) Water samples

High sensitivity ratiometric fluorescence temperature sensing using the microencapsulation of CsPbBr3 and K2SiF6:Mn4+phosphor

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Chinese Chemical Letters 2022年第11期33卷 4798-4802页

作者： Jingwen Jin Jie lin Yipeng Huang linchun Zhang Yaqi Jiang Dongjie Tian fangyuan lin Yiru Wang Xi Chen Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis&Instrumentation College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China State Key Laboratory of Marine Environmental Science Xiamen UniversityXiamen 361005China Shenzhen Research Institute of Xiamen University Shenzhen 518000China

A dual emission sensing film has been prepared for colorimetric temperature sensing using CsPbBr_(3)perovskite nanocrystals(CsPbBr_(3)NCs)and manganese doped potassium fluorosilicate(K_(2)SiF_(6):Mn^(4+),KSF)encapsulated in polystyrene by a microencapsulation *** CsPbBr_(3)-KSF-PS film shows good temperature sensing response from 30℃to 70℃,with a relative temperature sensitivity(Sr)up to 10.31%℃^(−1) at 45℃.Meanwhile,the film maintains more than 95%intensity after 6 heating-cooling cycles and keeps its fluorescence characteristics after 3 *** film can be used to monitor temperature change by naked eye under a UV *** particular,the temperature discoloration point of the sensing film can be controlled by the ratio change of CsPbBr_(3):KSF to expand its *** study of the CsPbBr_(3)-KSF-PS sensing mechanism in this work is helpful to provide effective strategies for the design of reliable,high sensitivity and stable temperature sensing system using CsPbBr_(3)NCs.

关键词： Ratiometric fluorescence sensing High sensitivity Perovskite nanocrystals Temperature Microencapsulation

Study of the effect of chemical composition on the surface wettability of three-dimensional graphene foams

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Chinese Chemical Letters 2020年第7期31卷 1839-1842页

作者： Guihua Huang Xinhong Song Yiying Chen fangyuan lin Yipeng Huang Feiming Li Zhiyong Guo Qiuhong Yao Xi Chen Institute of Analytical Technology and Smart Instruments College of Environment and Public HealthXiamenHuaxia UniversityXiamen 361024China State Key Laboratory of Marine Environmental Science Xiamen UniversityXiamen 361005China College of Ocean Science and Engineering.Shanghai Maritime University Shanghai 201306China

The chemical composition obviously affects the surface wettability of a three-dimensional(3D)graphene material apart from its surface energy and *** the hydrothermal preparation,the heteroatom doping changes the chemical composition and wettability of the 3D graphene *** realize the controllable surface wettability of graphene materials,aminobenzene sulfonic acid(ABSA)was selected as a typical doping agent for the preparation of nitrogen and sulfur co-doped 3D graphene foam(SNGF)using a hydrothermal *** from using o-ABSA or p-ABSA as the dopant,SNGF with tunable surface wettability is obtained only when m-ABSA is *** result indicates that the substituent position of-SO3H group in the benzene ring of ABSA is rather important for the tunable *** work provides some theo retical foundations for dopant selection and some new insights in manipulating the properties of 3D graphene foams by adjusting the configuration of dopants.

关键词： 3D graphene foam Surface wettability Dopant configuration Chemical composition Aminobenzene sulfonic acid

MnⅡ-Doped Semiconductor Nanocrystals: Oxygen Sensing Based On Luminescent Dopants and Host-Dopant Energy Transfer

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MnⅡ-Doped Semiconductor Nanocrystals: Oxygen Sensing Based ...

Lead Halide Perovskite Nanocrystals Embedded in Hollow Siliceous Nanospheres and Polyvinylidene Fluoride with Enhanced Stability in Polar Media

中国化学会第十三届全国分析化学年会

作者： fangyuan lin Feiming Li Xi Chen Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis &Instrumentation College of Chemistry and Chemical Engineering Xiamen University State Key Laboratory of Marine Environmental Science Xiamen University

The design of photoluminescence-quenching probes (PLQPs) for oxygen has always been an important direction of *** semiconductor nanocrystals have been proposed as emerging oxygen-responsive probes,but the inherent oxygen sensing of long-lifetime semiconductor NCs has not been reported so ***,Mn-doped CsPbCl perovskite nanocrystals (Mn:CsPbCl PNCs)with long-lifetime Mn emission (T→A)from host-dopant energy transfer (HDET) are described to demonstrate the oxygen sensing *** have revealed that the Mn-related luminescence can be reversibly quenched by oxygen,because of the dynamic deactivation of luminous state in ***,Mn:CsPbCl NCs are viable PLQPs obeying the Stern-Volmer law,where the PL quenching degree is up to 53%for pure ***,the Mn-doped ZnS nanocrystals(Mn:ZnS NCs) with similar long-lifetime emission (ms-scale) is also amenable to the reversible dual-emission quenching by *** is enlightening to develop the potential of inherent oxygen sensing based on the Mn-doped semiconductor nanocrystals.

关键词： Mn:CsPbCl3 NCs Mn:ZnS NCs Long-Lifetime Luminescent Dopant Host-Dopant Energy Transfer Inherent Oxygen Sensing

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Lead Halide Perovskite Nanocrystals Embedded in Hollow Silic...

水分和密度对化感水稻产量、品质及籽粒中Pb、Cd含量的影响

中国化学会第十三届全国分析化学年会

作者： Yipeng Huang Feiming Li fangyuan lin Xi Chen Department of Chemistry and the MOF Key Laboratory of Spectrochemical Analysis ＆Instrumentation College of Chemistry and Chemical Engineering Xiamen University

The poor stability of lead halide perovskite nanocrystals（LHP NC） in polar solvents has always been the biggest challenge since its birth, and this problem has tremendously hindered the applications of LHP NCs in many fields[1,2]. To address this problem, LHP NCs embedded in hollow siliceous nanospheres and polyvinylidene fluoride（LHP NCs@HSNs/PVDF） have been synthesized. The hydrophobic LHP NCs@HSNs/PVDF shows strong repulsion to water, and the photoluminescence of LHP NCs@HSNs/PVDF can be retained in ethanol longer than 2 weeks. The polar solvent resisted properties enable the surface processes of LHP NCs@HSNs/PVDF in some common solvents, and this may open an avenue for the applications of LHP NCs in fluorescence imaging, drug delivery and release, sensing, catalysis, etc.

关键词： Lead halide perovskite Hollow siliceous nanosphere Polyvinylidene fluoride Polar solvent

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华南农业大学学报 2018年第4期39卷 25-32页

作者：李奇吴在敬林芳源胡飞华南农业大学农学院广东广州510642 广东省江门市新会区农技推广中心广东江门529100 广东省江门市新会区农林局广东江门529100

【目的】探讨化感水稻产量、品质及重金属含量与水分管理和种植密度的关系,更好地发挥化感水稻环境友好的特点。【方法】以‘化感稻3号’、‘化两优78号’以及早季的‘玉香油占’和晚季的‘百香占’为材料,研究不同水分管理(孕穗期晒田W... 详细信息

【目的】探讨化感水稻产量、品质及重金属含量与水分管理和种植密度的关系,更好地发挥化感水稻环境友好的特点。【方法】以‘化感稻3号’、‘化两优78号’以及早季的‘玉香油占’和晚季的‘百香占’为材料,研究不同水分管理(孕穗期晒田WN、孕穗期不晒田WS)和种植密度(高密度DH、当地种植密度DN)处理下稻米的产量、品质以及籽粒中Pb和Cd含量的变化。【结果】稻米产量和品质在不同水分和密度管理条件下差异不显著,但在品种间有显著差异,表现为‘化两优78号’产量高于其他品种。WSDN处理显著降低了常规稻‘百香占’的精米率,但对化感品种影响不显著。WS处理降低了稻米Pb和Cd含量,尤其是显著降低了化感稻米Cd含量。密度和品种对稻米Pb和Cd含量影响不显著。【结论】水分和密度处理对化感水稻的产量和稻米品质影响不显著,但WS处理能够显著降低化感水稻籽粒中Cd含量。

关键词：化感水稻水分管理种植密度稻米品质 Pb Cd

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我国数据库权利行使的正当性分析

新世纪图书馆 2016年第8期 34-35,46页

作者：林方圆南京审计大学图书馆

目前,我国数据库权利是在著作权法、反不正当竞争法和合同法的框架下行使的。论文首先阐明我国数据库权利行使在法律这一正当性前提下进行,揭示其权利行使的自由和正义性都需要法律的保障,最后对依法保障我国数据库权利行使提出了几点... 详细信息

目前,我国数据库权利是在著作权法、反不正当竞争法和合同法的框架下行使的。论文首先阐明我国数据库权利行使在法律这一正当性前提下进行,揭示其权利行使的自由和正义性都需要法律的保障,最后对依法保障我国数据库权利行使提出了几点建议。

关键词：数据库权利行使著作权法反不正当竞争法合同法

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高校图书馆基层馆员的职业倦怠研究

科技情报开发与经济 2014年第21期24卷 45-46页

作者：林方圆南京审计学院图书馆江苏南京211815

高校图书馆工作中,基层馆员是图书馆服务的主要力量,但由于种种原因,基层馆员中存在职业倦怠现象。通过对高校图书馆基层馆员职业倦怠现象的研究,提出了矫正基层馆员职业倦怠现象的建议。

关键词：高校图书馆基层馆员职业倦怠

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广东省稻田杂草控制效果及影响因素

植物保护 2017年第4期43卷 158-166页

作者：彭亮李奇姬静华林芳源胡飞华南农业大学农学院广州510642 广东省江门市新会区农林局江门529000

为了解常规管理条件下对广东稻田杂草的控制效果及其影响因素,于2015年对粤东、粤西、粤北地区及珠江三角洲的早、晚季稻田杂草进行了调查分析。结果表明:在常规控制措施下稻田中综合草害指数与水稻产量呈负相关,推荐剂量的除草剂不能... 详细信息

为了解常规管理条件下对广东稻田杂草的控制效果及其影响因素,于2015年对粤东、粤西、粤北地区及珠江三角洲的早、晚季稻田杂草进行了调查分析。结果表明:在常规控制措施下稻田中综合草害指数与水稻产量呈负相关,推荐剂量的除草剂不能有效控制稻田杂草的危害,特别是在早季需要辅以人工措施对稻田杂草进行管理。稻田杂草对除草剂产生了不同程度的抗药性。化学除草剂成本低,水稻种植者目前仍可以通过更换除草剂品种和加大剂量对杂草进行控制。化感抑草品种的推广需要在品质和产量上进一步满足生产的需要。在杂草耐药性增加、环境和政策要求减少化学除草剂投入的双重压力下,选育具有化感抑草效果的水稻品种,结合农艺措施,应该成为今后稻田控草的发展方向之一。

关键词：稻田杂草综合草害指数除草剂化感抑草

农艺措施和除草剂用量对化感稻产量及杂草生物量的影响

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植物保护学报 2018年第5期45卷 1145-1153页

作者：李奇林芳源吴在敬文明德胡飞华南农业大学农学院广州510642 广东省江门市新会区农林局江门529000 广东省江门市新会区农技推广中心新会529100 江门新会区兆峰水稻专业合作社广东江门529000

为实现水稻生产减施除草剂的目标,将化感材料与农艺措施相结合取得对稻田杂草有效控制的效果,田间采用再裂区试验法研究了化感稻3号和N两优201两个水稻化感材料和非化感材料五山丝苗在不同水分管理、移栽密度和除草剂不同用量下,对水稻... 详细信息

为实现水稻生产减施除草剂的目标,将化感材料与农艺措施相结合取得对稻田杂草有效控制的效果,田间采用再裂区试验法研究了化感稻3号和N两优201两个水稻化感材料和非化感材料五山丝苗在不同水分管理、移栽密度和除草剂不同用量下,对水稻产量和田间杂草生物量的影响。结果表明:无论早季稻田还是晚季稻田,施用常规除草剂量的小区杂草生物量均为0,施用常规剂量50%除草剂且仅在孕穗期晒田的小区和常规密度小区有少量杂草发生。不施除草剂的水稻材料小区杂草生物量依次为化感稻3号

关键词：化感稻水分管理密度管理除草剂用量