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A simple approach to fabricate silicon carbide (SiC) whisker is reported via using cellulose nanocrystal (CNC) as templates. The CNC with a length between 2 and 4 lm and a width about 40 nm is prepared by hydrolysis of microcrystalline cellulose (MCC) in strong sulfuric acid condition. The sol-gel reaction of tetraethyl orthosilicate (TEOS) is employed to coat the CNC in the presence of acetic acid as acid catalyst. The SiC whisker is obtained by calcination of CNC/SiO 2 hybrid at 1200 C.

A visible-light-induced palladium-catalyzed cascade reaction was developed by etherification/C–C coupling cyclization of α-bromoacetophenones with phenols.