Use of Interfacial Interactions and Complexation of Carbon Dots to Construct Ultra ‐Robust and Efficient Photothermal Film From Micro‐Carbonized Polysaccharides

Solar energy conversion technologies, especially solar-driven photothermal conversion, are both clean and controllable. Carbonization of sodium carboxymethyl cellulose (CMC) produce just such a structure (termed CMC-g-CDs), which is used to produce an ultra-stable, robust, and efficient solar-thermal film by interfacial interactions within the CMC-g-CDs. Carbonization and complexation with Fe3+ increased the photothermal temperature and photothermal conversion efficiency by 47.95%. As a demonstration of a real-world application, the CMC-g-CDs-Fe film is used to construct a solar-driven TEG. AbstractSolar energy conversion technologies, particularly solar-driven photothermal conversion, are both clean and manageable. Although much progress has been made in designing solar-driven photothermal materials, significant challenges remain, not least the photobleaching of organic dyes. To tackle these issues, micro-carbonized polysaccharide chains, with carbon dots (CDs) suspended from the chains, are conceived, just like grapes or tomatoes hanging from a vine. Carbonization of sodium carboxymethyl cellulose (CMC) produces just such a structure (termed CMC-g-CDs), which is used to produce an ultra-stable, robust, and efficient solar-thermal film by interfacial interactions within the CMC-g-CDs. The introduction of the CDs into the matrix of the photothermal material effectively avoided the problem of photobleaching. Manipulating the interfacial interactions (such as electrostatic inte...
Source: Small - Category: Nanotechnology Authors: Tags: Research Article Source Type: research