02443nas a2200265   4500008004100000022001400041245016400055210006900219260000900288300001400297490000600311520153400317653001101851653002301862653001501885653001801900653001901918653002001937100001701957700001901974700001801993700002102011700001802032856012702050       2019                        eng d  a2168-048500aDirect thermal polymerization approach to N-rich holey carbon nitride nanosheets and their promising photocatalytic H-2 evolution and charge-storage activities0 aDirect thermal polymerization approach to Nrich holey carbon nit  cMAY   a9428-94380 v73 a<p>Energy conversion and energy storage are two crucial challenges in green chemistry that have attracted tremendous attention for the last several decades. In this work, we have addressed both issues by synthesizing nitrogen-rich, few-layer-thick holey graphitic carbon nitride (g-C3N4) nanosheets by a simple, novel, direct thermal polymerization method, which is found to be very good in photocatalytic H-2 evolution reaction (energy-conversion) and charge-storage supercapacitor (energy-storage) applications. This as-synthesized conjugated polymer semiconductor (obtained stoichiometry C3N4.8) with unique structural and morphological advantages exhibits superior photocatalytic water splitting activity to H-2 evolution (2 620 mu mol h(-1) g(-1)) without the help of any cocatalysts under visible light in the presence of 20% triethanolamine (TEOA). The calculated apparent quantum yield is 8.5% at 427 nm, and the rate of photocatalytic hydrogen generation remained constant for nine consecutive catalytic cycles (9 h photocatalysis). The present material also shows electrochemical double layer capacitor (EDLC) behavior in alkaline electrolyte, where a symmetric coin cell device consisting of this electrode material without any large area support or conductive filler delivers high specific capacitance (275 F g(-1)), energy density (30 Wh kg(-1)), and power density (6651 W kg(-1)), and the supercapacitor cell can retain &gt;98% capacitance efficiency up to 10 000 measured cycles at various current densities.</p>
10ag-C3N410aHydrogen evolution10ananosheets10aPhotocatalyst10asupercapacitor10awater splitting1 aAntil, Bindu1 aKumar, Lakshya1 aReddy, K., P.1 aGopinath, C., S.1 aDeka, Sasanka  uhttps://library.ncl.res.in/content/direct-thermal-polymerization-approach-n-rich-holey-carbon-nitride-nanosheets-and-their