This work used a combination of designed synthesis conditions for SBA-15 to gain new insights into the genesis of micropores and secondary mesopores bridging the primary mesoporous channels. Different SBA-15 samples were prepared at low temperature (35 and 60 °C) without stirring to generate a simple monodispersed rodlike morphology. Sodium chloride was used to control the occurrence of micropores. All samples were used as templates for the synthesis of CMK-5 type (nanopipes) of porous carbons via carbonization of occluded poly(furfuryl alcohol). Detailed characterization of the silica templates, the carbon/silica composites, and the nanoporous carbons led to the following main conclusions: (i) Combination of inorganic salts with low synthesis temperature (ca. 35 °C) afforded SBA-15 silica free of micropores and secondary mesopores, akin to MCM-41. The corresponding carbon was fibrous in nature and did not retain the rodlike morphology of the template; (ii) the microporous as well as mesoporous bridges c...