About this Research Topic
Carbon dioxide (CO2) emission has led to global warming. The depletion of fossil fuels will ultimately force us to seek alternative energy sources to maintain a sustainable economy. Converting CO2 into value-added chemicals using solar energy is a promising strategy to simultaneously solve environmental deterioration and fossil fuel crisis. To achieve this goal, it is essential to design efficient photocatalysts. Recently, colloidal quantum dots (QDs) have exhibited great potentials in photocatalytic applications due to their excellent properties, such as large extinction coefficients, abundant surface sites, easy preparation, low cost, and tunable bandgaps. However, it remains a challenge to improve the photocatalytic performance of QDs to meet the demand of large-scale applications.
In recent years, QD-based photocatalysts have exhibited a spectacular performance evolution. A fundamental goal of this Research Topic is the development of novel strategies toward QD-based photocatalysts for CO2 reduction. These strategies can include dimension control, composition regulation, as well as surface/interface engineering. Moreover, as the mechanisms of photocatalytic CO2 reduction are unclear, this collection will cover systematic studies of reaction mechanisms and the spectroscopic characterization of catalytic intermediates. Furthermore, the aim of this Research Topic is also to search for new ideas and innovations and to understand the basic science behind the development of QDs for their application in photocatalytic CO2 reduction.
This Research Topic aims to collect recent developments and applications of QDs as well as highlight prospective directions in this field. This Research Topic covers QD catalysts based on conventional and metal halide perovskite QDs for CO2 reduction. We welcome the submission of Original Research articles, Reviews, Perspectives, and Mini-Reviews to this Research Topic. Potential topics of primary interest include, but are not limited to:
• Applications of photocatalytic technologies in CO2 conversion
• Relationship of catalyst structure and catalytic performance
• Identification of active sites
• Mechanistic studies (intermediates, reaction pathways, roles of additives)
• Surface functionalization and modification of QDs
• Theoretical and experimental studies on photocatalytic mechanisms of CO2 reduction
In addition, we strongly recommend that the submitted papers meet the following requirements:
(1) Counter oxidation reaction should be oxygen evolution, and stoichiometric oxygen production must be shown;
(2) Rate of reduction product(s) and oxygen formations must be shown in the actual molar amount, not divided by the weight of photocatalyst, and quantum efficiency must be evaluated;
(3) For both oxidation and reduction products, certification of the isotope-labeled sources, water, and carbon dioxide, respectively, must be shown;
(4) The molar amount of products must be at least ten times higher than the material used as a photocatalyst; alternatively, no change in amount and structure after photoreaction should be shown;
(5) Action spectrum being the same as absorption spectrum of a photocatalyst in the shape should be shown.
Keywords: quantum dots, photocatalysis, CO2 reduction, mechanistic studies, catalytic engineering
Important Note: All contributions to this Research Topic must be within the scope of the section and journal to which they are submitted, as defined in their mission statements. Frontiers reserves the right to guide an out-of-scope manuscript to a more suitable section or journal at any stage of peer review.