Abstract: Porous silicon is becoming a hot research topic both at home and abroad because of its unique and efficient photoelectric effect.The porous silicon was prepared by thermal reduction of silica (micro- or nano-silica) at a temperature of 450 ℃ and 500 ℃ by one-step reacting with LiAlH4.The products were characterized and analyzed by XRD, IR, SEM and SPEF. This experimental method is green and environmentally friendly which has potential value of application.
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