Low temperature electrochemical preparation of carbon with a high surface area from polytetrafluoroethylene

Surface modification of poly(tetrafluoroethylene)with benzophenone and sodium hydride by ultraviolet irradiation

“…chemical derivitization of PTFE surfaces. These anhydrous dichloromethane (DCM), octadecylacrylate, bromine, and ethyl alcohol (Et-OH) were methods include treatment with alkali metals in the presence of ammonia [2][3][4] and treatment with purchased from Aldrich (Milwaukee, WI). Sulfuric acid (95 to 98%) was purchased from EM Sciglow discharges, 5,6 especially with plasmas containing scavengers for fluorine radical to prevent ence (Gibbstown, NJ).…”

Novel and scalable solid-state synthesis of a nanocrystalline FeF3/C composite and its excellent electrochemical performance

“…25,26 The amount of carbon in the 2:1 sample was 16.7wt% measured by elemental analysis (CHNS E.A). From these understandings of the effects of PTFE and T on the synthesis of FeF 3 , we selected an optimized synthesis condition: 2:1 w:w PTFE: Fe(C 2 O 4 )•2H 2 O at 600°C for 1 h under Ar.…”

Preparation and porous control of amorphous carbons by co-defluorination of perfluorooctane and octafluorotoluene in vapor phases at 423 K

“…Conversely, the precise control of the porosity will sometimes necessitate other more effective methods, such as those using the inorganic template materials [8]. A method similar to the template method, the defluorination of polytetrafluoroethylene(PTFE) by means of alkali metals, also may allow for the synthesis of amorphous porous carbons without the use of a conventional activation process at high temperature [8][9][10][11][12]. In this process, a sp 1 carbyne-like chain structure is temporarily formed at the first step of defluorination of PTFE [13] followed by partial cross-inking between the vicinal linear chains to lead to sp 2 carbon products such as by-products around the inorganic alkali fluoride particles; finally, the particles can be easily removed from the carbon matrix by acid treatment to produce pores in the carbon.…”