A boron-doped carbon nano-/microballs (BC) was successfully obtained via a two-step procedure including hydrothermal reaction\n(180âË?Ë?C) and carbonization (800âË?Ë?C) with cheap starch and H3BO3 as the carbon and boron source. As a new kind of boron-doped\ncarbon, BC contained 2.03 at% B-content and presented the morphology as almost perfect nano-/microballs with different sizes\nranging from 500nm to 5
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