摘要：Graphitic carbon nitride (g-C3N4) has emerged as a promising photocatalyst for CO2 reduction owing to its cost-effective synthesis and visible-light responsiveness. However, conventionally prepared g-C3N4 suffers from limited specific surface area and rapid recombination of photogenerated charges. In this study, a bottom-up acidification strategy was employed to modify the precursor, successfully fabricating high-surface-area g-C3N4. The optimized photocatalyst (CN-3) exhibited a specific surface area of 55.9 m2·g?1, quadrupling that of pristine g-C3N4 (CN-0). Photocatalytic evaluation revealed that all samples synthesized via the bottom-up approach demonstrated superior CO2 reduction performance, with the best-performing CN-3 achieving a CO production rate of 11.4 μmol·g?1·h?1—twice that of conventionally prepared g-C3N4. The enhanced activity is attributed to: the markedly increased surface area and reduced interlayer thickness, shortening charge migration paths; an upward shift of both valence and conduction bands, strengthening oxidation capacity to promote water oxidation; and introduced surface carbon vacancies that enhance CO2 adsorption while serving as electron traps, creating defect levels to facilitate charge separation and migration. This work provides a facile strategy to engineer high-performance g-C3N4 photocatalysts for solar fuel production. ? 2025

ISSN号：0169-4332

卷、期、页：v 713,

发表日期：2025-12-15

影响因子：0.000000

期刊分区（SCI为中科院分区）：二区

收录情况：SCIE（科学引文索引网络版）,EI（工程索引）

发表期刊名称：Applied Surface Science

通讯作者：李蓉蓉,贾亦静,贾亦静,杨晗,许振,黄萌

第一作者：魏强,周亚松

论文类型：期刊论文

论文概要：李蓉蓉,贾亦静,贾亦静,杨晗,许振,黄萌,魏强,周亚松，Visible-light-active high-surface-area g-C3N4 for efficient photocatalytic CO2 conversion，Applied Surface Science，2025，v 713,

论文题目：Visible-light-active high-surface-area g-C3N4 for efficient photocatalytic CO2 conversion