A resource-utilization strategy of the waste PCBs was developed: preparation of high value-added silicon carbide (SiC) nanoparticles using the waste PCBs as both silica and carbon precursors. The preparation process contained three optimized steps: acid wash pretreatment with 3 mol L nitric acid at 60 °C for 96 h, low-temperature pyrolysis at 500 °C to allow the epoxy resin to decompose into carbon, and high-temperature pyrolysis at 1600 °C (in situ carbothermal reduction) to gain pure SiC nanoparticles. The pseudo first-order reaction rate constant (k) of the p-n heterojunction of SiC/TiO towards the photocatalytic degradation of methylene blue was 0.0219 min, 3.42 and 3.98 times that of TiO and no acid washed-SiC/TiO, respectively.
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| http://dx.doi.org/10.1016/j.jhazmat.2019.03.115 | DOI Listing |
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