The insufficient photogenerated charge separation efficiency and low light absorption capacity of carbon nitride (CN) limit the production efficiency of hydrogen. Grafting organic small molecules onto CN to construct a donor-acceptor (D-A) system is an effective strategy for enhancing the photocatalytic performance. This work constructed a fully organic D-A material by grafting 2-benzothiazolamine (BZM) onto tubular CN (TCN) to alter the band structure of TCN. The all-organic D-A system disrupts the structural symmetry of CN and forms new charge transfer pathways, thereby accelerating intermolecular electron separation and transfer. The results of the photocatalytic hydrogen production experiment show that the photocatalytic hydrogen production rate of TCN-BZM0.3 reaches 4.11 mmol g-1 h-1 and exhibits good photocatalytic stability. This work investigates the facilitating effect of D-A structures on charge transfer and elucidates the corresponding photocatalytic mechanism, thereby providing valuable insights into the rational design of highly efficient organic photocatalysts.
Zhihuan Miao, Xuyue Wang, Hao Zhang et al.· Journal of Colloid and Inter...· 0 citations
Biochar is a porous carbonaceous material synthesized through the pyrolysis of diverse biomass resources, including agricultural and forestry residues as well as livestock manure. It possesses superior characteristics such as a large specific surface area, adjustable pore architecture, abundant surface functional groups, and favorable electrical conductivity. With the increasingly severe global energy shortage and environmental pollution problems in recent years, biochar has emerged as a green, low-cost functional material with distinct application superiority in multiple key research directions, including energy storage and conversion, chemical catalysis, environmental restoration, and signal sensing and detection. This study comprehensively summarizes the latest research advances of biochar in the aforementioned application fields, focusing on innovative achievements in photocatalytic and electrocatalytic hydrogen generation, supercapacitors and electrochemical energy storage systems, persulfate activation technology, carbon dioxide capture, remediation of heavy metal and organic contaminants, volatile organic compound (VOC) adsorption, as well as electrochemical sensing devices. Existing research results demonstrate that modification strategies including metal and non-metal doping, surface oxidation treatment, and compounding with semiconductors or metal oxide materials can effectively improve the catalytic activity and functional performance of biochar. Furthermore, this paper prospects the future interdisciplinary development trends of biochar, analyzes the existing research gaps in mechanism exploration, structural optimization design, and industrial large-scale preparation, and provides theoretical and practical references for the further popularization and application of biochar in sustainable energy development and environmental governance fields.
Xi Luo, Yi-heng Lu, Guang-Teng Bai et al.· Molecules· 0 citations
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