Journal
CATALYSIS SCIENCE & TECHNOLOGY
Volume 11, Issue 16, Pages 5432-5447Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1cy00595b
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Funding
- National Natural Science Foundation of China [21607034]
- Beijing Natural Science Foundation [8192011]
- Science and Technology General Project of Beijing Municipal Education Commission [KM202010016006]
- Pyramid Talent Training Project of Beijing University of Civil Engineering and Architecture [JDYC20200313]
- National Key R&D Program of China [2020YFC1808805]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB17000000]
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Graphitic carbon nitride (g-C3N4) as a green, visible-light-driven metal-free semiconductor material has significant importance in environmental purification and energy conversion. Creating defects to induce a polarization effect is a promising strategy for improving the photocatalytic properties of g-C3N4. The relationship between defects and the polarization effect in enhancing photocatalytic performance needs further clarification.
As a green, visible-light-driven metal-free semiconductor material, graphitic carbon nitride (g-C3N4) has generated tremendous significance in the fields of environmental purification and energy conversion. Inducing a polarization effect by creating defects in g-C3N4 is a promising strategy for improving photocatalytic properties. The polarization effect in photocatalysts could be created by manufacturing vacancies, doping impurity atoms, constructing heterostructure, etc. Recently, defective g-C3N4 has attracted wide attention due to its remarkable performance in the separation and migration of photogenerated charge carriers. However, the relationship between defects and the polarization effect remains to be clarified in terms of improving the photocatalytic performance. In this minireview, we summarize the recent advances on how the polarization effect and defect engineering expedite the photogenerated carrier migration and separation to improve the photocatalytic properties of g-C3N4. Is it pure synergy or is there some degree of antagonism? Ultimately, the major challenges for simply constructing the polarization effect and internal electric field in g-C3N4 and inspiring perspectives for future opportunities in polarization-defect type photocatalysis are discussed. It is believed that this work can provide a new idea for the design of novel and efficient photocatalysts in the future.
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