分类： 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间： 2017-05-02
Lu, W [Lu, Wei][ 1,2 ]
Xiao, P [Xiao, Peng][ 1 ]
Gu, JC [Gu, Jincui][ 1 ]
Zhang, JW [Zhang, Jiawei][ 1 ]
Huang, YJ [Huang, Youju][ 1 ]
Huang, Q [Huang, Qing][ 1 ]
Chen, T [Chen, Tao][ 1 ]
摘要： A polymer-based visible and quantitative fluorometric assay for CO2 gas is constructed using branched polyethyleneimine (PEI) covalently modified with tetraphenylethylene (TPE). The sensing mechanism relies on the reaction of CO2 with alkylamines of PEI to induce the “solution-to-precipitation” phase transi- tion of the sensory polymer (TPE–PEI), thus resulting in strong aggregation-induced fluorescent emission of TPE–PEI. It works in a relatively environmental benign ethanol medium and avoids the use of toxic amine compounds with unpleasant odor. More importantly, this system is proved to be highly tolerant to possibly coexisting water, carbon monoxide, acid SO2 and H2 S gases as well as many common volatile organic compounds. These characteristics make the presently developed fluorescent chemosensor hold great potential for many real-world applications.
提交时间： 2017-05-02
Zheng, J [Zheng, Jing][ 1 ]
Xiao, P [Xiao, Peng][ 1 ]
Liu, W [Liu, Wei][ 1 ]
Zhang, JW [Zhang, Jiawei][ 1 ]
Huang, YJ [Huang, Youju][ 1 ]
Chen, T [Chen, Tao][ 1 ]
摘要： Development of self-healing polymers with spontaneous self-healing capability and good mechanical performance is highly desired and remains a great challenge. Here, mechanical robust and self-healable supramolecular hydrogels have been fabricated by using
分类： 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间： 2017-05-02
Huang, YJ [Huang, Youju][ 1 ]
Kannan, P [Kannan, Palanisamy][ 2 ]
Zhang, L [Zhang, Lei][ 1 ]
Rong, Y [Rong, Yun][ 1 ]
Dai, LW [Dai, Liwei][ 1 ]
Huang, RQ [Huang, Rongqin][ 3 ]
Chen, T [Chen, Tao][ 1 ]
摘要： Bimetallic nanocatalysts often display enhanced physical and chemical properties compared to those of their monometallic counterparts. Herein, we introduce a simple method to fabricate an island like array of tiny Ag nanoparticles bounded on triangular Au nanoplates as the surface-enhanced Raman scattering (SERS) substrate. The surface morphology of the synthesized nanoparticles was characterized via field emission scanning electron microscopy (FE-SEM), and atomic force microscopy (AFM). Rhodamine 6G (R6G) is used as a model analyte to evaluate the performance of the tiny Ag nanoparticle bounded triangular Au nanoplates as a SERS-active substrate and validate the SERS effect. The fabricated SERS substrate showed drastically enhanced intensity with a SERS enhancement factor as high as 107, which is enough to detect a single molecule, and excellent reproducibility (less than `5%) of the signal intensity. This is because of the island-like tiny Ag nanoparticle bounded triangular Au nanoplates and their large number of “hot spots”. This substrate could also be used for label-free immunoassays, biosensing, and nanoscale optical antennas and light sources.
分类： 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间： 2017-05-02
Wu, ZY [Wu, Ziyang][ 1,2 ]
Lin, HB [Lin, Haibo][ 1 ]
Wang, YZ [Wang, Yunze][ 1 ]
Yu, XM [Yu, Xuemin][ 1,2 ]
Li, JL [Li, Jinglong][ 1 ]
Xiong, Z [Xiong, Zhu][ 1 ]
Wang, Y [Wang, Yi][ 1 ]
Huang, YJ [Huang, Youju][ 1 ]
Chen, T [Chen, Tao][ 1 ]
Liu, F [Liu, Fu][ 1 ]
摘要： Poly(vinylidene fluoride) (PVDF) membranes have been widely applied to treat wastewater, however, the removal of toxic aromatic phenolic compounds remains a technical challenge due to the serious adsorption fouling and difficult degradation. Herein, we aimed to design a superhydrophilic PVDF membrane decorated with Au nanoparticles, which enhanced the rapid degradation of p-nitrophenol (4-NP). The superhydrophilic PVDF membrane with a micro/nano structured surface was decorated with Au nanoparticles via poly(dopamine) (PDA) as a spacer. The influences of membrane affinity (e.g. Hydrophilic Membrane (HM), micro/nano structured superhydrophilic membrane (MSiM), and micro/ nano structured superhydrophobic membrane (MSoM)) on PDA deposition and the subsequent Au decoration were comprehensively investigated. The synthesized Au nanoparticles were characterized using transmission electron microscopy (TEM) and UV-vis absorption spectra. The morphology and composition was evaluated using scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Static catalytic experiments demonstrated that MSiM degraded over 90% of 4-NP in 5 minutes with a kinetic reaction rate constant of 47.84 10 2 min 1 and high stability over 6 cycles. A membrane catalytic reactor (MCR) was designed to realize the continuous catalytic degradation of 4-NP with a kinetic reaction rate constant of 7 10 2 min 1.
点击量
待评议
点击量
下载量
评论
