研究目的
To develop a sustainable and scalable photocatalytic system for simultaneous hydrogen production and pollutant utilisation using carbon dots derived from biomass waste.
研究成果
The research demonstrates a sustainable approach for simultaneous hydrogen production and pollutant utilisation using biomass-derived carbon dots and a Ni-based co-catalyst. This system operates efficiently in untreated water, leveraging pollutants as electron donors, and presents a scalable and economically viable solution for green fuel synthesis.
研究不足
The study acknowledges the instability and decomposition of the molecular NiP catalyst over prolonged irradiation, which affects the hydrogen production rate. Additionally, the photocatalytic performances of CDs derived from different biomass sources vary, indicating a dependency on the precursor's composition and structure.
1：Experimental Design and Method Selection:
The study involved the synthesis of carbon dots (CDs) from various biomass precursors through pyrolysis under air. The photocatalytic activities of these CDs were evaluated in the presence of a Ni-based co-catalyst for hydrogen production in purified and untreated water.
2：Sample Selection and Data Sources:
CDs were synthesized from purified biomass components (α-cellulose, xylan, lignin) and crude biomass sources (leaves, cotton). The photocatalytic performances were tested in purified water, untreated river, and sea water.
3：List of Experimental Equipment and Materials:
Equipment included muffle furnaces for CD synthesis, a Newport Oriel solar light simulator for photocatalytic experiments, and a JEOL JEM–2011 electron microscope for TEM imaging. Materials included biomass precursors, NiP co-catalyst, and EDTA as a sacrificial electron donor.
4：Experimental Procedures and Operational Workflow:
CDs were synthesized by calcinating biomass precursors at optimized temperatures. Photocatalytic experiments were conducted under simulated solar light, with gas samples analyzed by gas chromatography.
5：Data Analysis Methods:
The photocatalytic performances were evaluated based on hydrogen yield, specific activities, and turnover numbers. Data were processed using CasaXPS for XPS analysis and Omnic software for FTIR spectra.
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