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| 1 | Nanoparticle-immersed paper imprinting mass spectrometry imaging reveals uptake and translocation mechanism of pesticides in plants显示文摘Design and discovery of carrier-mediated modified pesticides are vital for reducing pesticide dosage and increasing utilization,yet it remains a great challenge due to limited insights into plant translocation mechanisms.Nanostructure/nanoparticle assisted laser desorption/ionization strategy has established itself as a preferential analytical tool for biological tissue analysis,whereas potential applications in plant sciences are hindered with regard to the inability to slice plant leaves and petals.Herein,we report gold nanoparticle(AuNP)-immersed paper imprinting mass spectrometry imaging(MSI)for the spatiotemporal visualization of pesticide translocation in plant leaves.This approach plays a dual role in preserving spatial information and improving ionization efficiency for pesticides regardless of imaging artifacts due to homogenous AuNP deposition.Using this MSI platform,we proposed the elaborate plant translocation mechanism of agrochemicals for the first time,which is currently poorly understood.The dynamic processes of carrier-mediated pesticides can be clearly visualized,including crossing of plasma membranes by transporters,translocation downward in stems through the phloem,diffusion to the xylem and,conversely,accumulation at margins of the treated leaves.Moreover,this AuNP-assisted paper imprinting method could be highly compatible with laser-based MSI instruments,expediting researches across a broad range of fields,especially in nanomaterial development and life sciences. | Xinzhou Wu Run Qin Hanxiang Wu Guangkai Yao Yue Zhang Ping Li Yizhu Xu Zhixiang Zhang Zhibin Yin Hanhong Xu | 2020 | Nano Research2020，13，3： | 8 |
| 2 | 石墨烯负载的空心银钯纳米粒子的制备及其在过氧化氢检测中的应用显示文摘制备了在石墨烯上修饰的AgPd合金纳米粒子,并将其应用于对过氧化氢(H2O2)的电化学检测。通过两步合成得到此纳米复合物:利用柠檬酸钠作为保护剂和还原剂,合成石墨烯负载的Ag纳米粒子(Ag/GO);在100℃下,通过Ag与Pd2+之间的置换反应得到石墨烯负载的具有空心结构的AgPd合金纳米粒子(AgPd/GO)。用紫外-可见光谱(UV-vis),电子显微镜(TEM)等对此纳米复合物的结构及其吸收光谱和形貌进行了表征。电化学循环伏安法(CV)和计时安培法(i-t)的研究结果表明,修饰在石墨烯上的空心AgPd合金纳米粒子对H2O2还原具有显著的催化活性,对H2O2检测的线性范围为0.01~1.4 mmol/L(R=0.990);检出限为1.4μmol/L。 | 刘敏敏 魏文涛 逯一中 武海滨 陈卫 | 2012 | 分析化学2012，40，10： | 8 |
| 3 | 不同还原方法对氧化还原法制备的功能化石墨烯的影响显示文摘利用改进的Hummer法制备氧化石墨,然后分别采用化学还原法和热还原法将氧化石墨还原制得功能化石墨烯。采用X-射线衍射(XRD)、扫描电镜(SEM)、傅立叶红外(FT-IR)和热重(TG)等表征手段对功能化石墨烯制备过程中的原料石墨、氧化石墨和石墨烯进行了表征。结果表明,化学还原法和热还原法都能还原氧化石墨制得功能化石墨烯,但还原程度不同。与化学还原法相比,热还原法制备的功能化石墨烯含有较少含氧基团,且工艺简单,耗时少,是一种高效制备大量功能化石墨烯的方法。 | 叶飞 余林 曹小荣 陈胜洲 林维明 | 2012 | 化工新型材料2012，40，6： | 4 |
| 4 | 微波法制备石墨烯及其金属复合材料显示文摘采用改进的Hummers法制备氧化石墨(GO),通过微波辐射法(MWI),以绿色、无毒的聚乙二醇(PEG)为还原剂和稳定剂,原位制备石墨烯(RGO)及其金属纳米复合材料,实现了GO的控制还原及金属纳米粒子的均匀附着.利用紫外吸收光谱(UV-Vis)、傅里叶红外光谱(FT-IR)、透射电子显微镜(TEM)对所得材料进行分析表征,并通过循环伏安法(CV)对材料的电化学性能进行研究.结果表明:制得的RGO材料呈电子透明状,金属纳米粒子均匀分散在RGO片层上;而且复合材料对铁氰化钾的电催化活性很高,可以用于电化学传感器等电化学领域. | 李丽 张纪梅 | 2013 | 天津工业大学学报2013，32，6： | 2 |
| 5 | Organic salt-assisted liquid-phase shear exfoliation of expanded graphite into graphene nanosheets显示文摘How to improve the efficiency of liquid-phase shear exfoliation(LPSE)for mass production of large-size graphene nanosheets still remains an ongoing challenge.In this work,we have developed a LPSE method using a rotor-stator mixer.It is quite simple and efficient by exfoliation of expanded graphite(EG)in Nmethyl-2-pyrrolidone(NMP)with the assistance of organic salts including sodium citrate,potassium citrate and sodium tartrate.The LPSE of EG in NMP can provide improved yields,up to 6 times as high as values from exfoliation of natural flake graphite(NFG).The additive of organic salts in NMP can make a further improvement in graphene yields,1.5 times higher than that obtained only in NMP.Remarkably,the yields of the as-exfoliated graphene are as high as 10%under optimal conditions,and up to 50%after multiple-cycle exfoliation.Organic salts in LPSE act as analogue grinding aids enhancing the applied shear forces and thus contributing to the improved efficiency of LPSE,but they do not intercalate into the interplanar spaces of graphite.This facile LPSE method should have excellent potential in the large scale production of graphene nanosheets for numerous applications. | Bin Liang Kangwei Liu Peng Liu Long Qian Guangyao Zhao Weisheng Pan Chaojie Chen | 2021 | Journal of Materiomics2021，7，6： | 1 |
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