Nitrogen-doped hydrochars from shrimp waste as visible-light photocatalysts: Roles of nitrogen species

Food-waste-derived hydrochar to a low-cost p-type semiconducting photocatalyst (Zn–Al@HC): multifunctional role in real wastewater treatment and environmental sustainability

“…26 Furthermore, a decrease in the intensity of the SiO 2 peak was observed with the addition of the Zn–Al composite during the synthesis, which might be due to carbon gradually covering the crystal plane of SiO 2 . 27…”

“…26 Furthermore, a decrease in the intensity of the SiO 2 peak was observed with the addition of the Zn-Al composite during the synthesis, which might be due to carbon gradually covering the crystal plane of SiO 2 . 27 For the synthesized Zn-Al@HC photocatalyst, the XRD pattern obtained at 31.65°[220], 36.12°[311], and 56.42°[422], (JCPDS no: 00-005-0669) affirmed the formation of ZnAl 2 O 4 spinel phase in the photocatalyst supported by the carbonaceous structure, which follows the previous investigation conducted on the BC-ZnAl 2 O 4 composite 28 and Zn/Al LDHs@C. 29 Note that the decrease in crystallization degree and improvement in the amorphous sites in the Zn-Al@HC photocatalyst can cause structural defects and impact both the photo-induced e − /h + pairs and the efficiency of resulting charge carrier separation. This phenomenon will be further supported by CA and EIS results in the following sections.…”

Towards Negative Emissions: Hydrothermal Carbonization of Biomass for Sustainable Carbon Materials

“…Chen et al synthesized nitrogen-doped hydrochars (NDHCs) by a one-pot HTC method utilizing a biomass model compound (glucose) and shrimp waste. [380] These HTC carbon materials, utilized as visible light-induced photocatalysts, were assessed for their efficacy in degrading MB. The porous surface's enhanced adsorption capacity, coupled with the synergistic The ORR electrocatalytic performance of HTC carbon materials under acidic conditions with various rotation rates.…”

“…Reproduced with permission. [380] Copyright 2022, Elsevier. up to 71.6% under optimal operating conditions.…”

“…c) Proposed mechanism for MB degradation over HTC carbon materials photocatalyst under visible light irradiation. Reproduced with permission [380]. Copyright 2022, Elsevier.…”