Anti-PPY monoclonal antibody, clone IZC 458-07

Polypyrrole (PPy)-TiO2@WO(3)catalyst supposed by cellulose aerogel beads was synthesized using inverse suspension crosslinking approach. The resulting particles were small and well-crystallized according to scanning and transmission electron microscopies. The efficiency of the resulting photocatalysis was tested relative to degradation of tetraethylated rhodamine (RhB), which was judged by solution discoloration and also by RhB content decrease. Excellent photocatalytic activity of cellulose aerogel (CE)-PPy-TiO2@WO(3)beads was attributed to the synergy between TiO(2)and WO3, which widened material absorption bandedge and improved migration efficiency of photogenerated electrons and holes. Presence of black PPy widened absorption band edge further promoting photogenerated electron and hole separation. More importantly, presence of macro-porous CE increased optical absorption of this composite photocatalyst and helped photocatalyst to retain its structural integrity during repeated recycling. If needed, photocatalyst can be easily removed from the reaction solution to prevent secondary pollution. Our complex CE-PPy-TiO2@WO(3)bead-like photocatalyst also demonstrated good mechanical strength and excellent flexibility, which allowed it to be folded and bent. We proposed photocatalytic mechanisms responsible for processes involving CE-PPy-TiO2@WO(3)beads, understanding of which will help to improve the photocatalytic performance of this material even further. Catalysts based on CE-PPy-TiO2@WO(3)beads can be used in complex environments and small spaces because of their flexibility and recyclability. It might be especially useful for applications in difficult-to-reach places (for example sandy places or narrow openings), in which it is difficult to place or recover a catalyst.

A green and facile method was adopted to fabricate graphene paper (GrP) decorated with polypyrrole (PPy) as supercapacitor electrode material. Polypyrrole was deposited on GrP at room temperature via one-step electropolymerization of 5% pyrrole with 0.5 M H2SO4 as electrolyte solution in a three-electrode configuration using GrP, platinum wire, and Ag/AgCl (1 M KCl), as working electrode, counter electrode and reference electrode, respectively. Different cyclic voltammetry (CV) deposition cycles (1, 3, 5, 8, 10 and 15) were applied under constant potentials in the range of 0.0 to 1.0 V at a scan rate of 30 mV/s. Successful electropolymerization of PPy onto GrP was confirmed via analytical (FT-IR, XPS and Raman spectroscopies), electrochemical (CV, electrochemical impedance spectroscopy), and morphological (scanning electron microscopy) characterizations of the fabricated GrP-PPy nanocomposite. Based on the CV data obtained in a three-electrode system, among the as-prepared electrodes those prepared with eight deposition cycles of PPy (GrP-PPy/8) produced the best supercapacitance performance. A flexible asymmetric all-solid-state supercapacitor device (AASD) was fabricated with GrP-PPy/8 as positive electrode and GrP as negative electrode. The areal capacitance of the AASD was as high as 128.9 mF/cm(2) at current density of 0.1 mA/cm(2). The AASD also exhibited excellent energy density (16.1 mWh/cm(2)) and power density (180 mW/cm(2)); and its cyclic stability was over 85% after 5,000 consecutive galvanostatic charge/discharge cycles. These results point to a novel and fast route to fabricate free-standing and flexible supercapacitor devices.