Recycling hot-water extractions of lignocellulosic biomass in bio-refinery for synthesis of carbon nanoparticles with amplified luminescence and its application in temperature sensing

Longfei Zhang, Shaoyi Lyu, Qijun Zhang, Stephen C. Chmely, Yuntao Wu, Chuck Melcher, Kalavathy Rajan, David P. Harper, Siqun Wang, Zhilin Chen

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Fluorescent carbon dots (CDs) with amplified photoluminescence (PL) intensity were synthesized using recycled hot-water extraction wastes of lignocellulosic biomass according to a bio-refinery concept without carbonization of the entire biomass. The recycled waste liquid was obtained by pre-extracting biomass with pressurized hot-water under 120–180 °C for 30 and 60 min. CDs with controlled N-doping were obtained by a hydrothermal carbonization strategy of the pre-extraction liquid at 220 °C for 5 h. The main chemical component of pre-extraction hydrolysates was analyzed by high-performance liquid chromatography (HPLC). The effects of hydrolyzed sugars and other heteroatom-containing extracts on fluorescence of CDs were investigated by measuring the PL performance. The superior biomass-based CDs exhibited tunable quantum yields (QYs) of 6.2 %–11.8 % with hot-water extractions as precursor without carbonization destruction of the entire biomass. CDs with higher QYs could serve as an effective luminescent sensing platform for probes, temperature sensing, and anti-counterfeit applications.

Original languageEnglish (US)
Article number112066
JournalIndustrial Crops and Products
StatePublished - Mar 2020


All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science

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