Na-CN/TiO2复合S型光催化剂的构建及其产H2O2性能研究
樊凡 , 王梦祥 , 王宇婷 , 崔永朋 , 王雅君
现代化工 ›› 2026, Vol. 46 ›› Issue (2) : 109 -115.
Na-CN/TiO2复合S型光催化剂的构建及其产H2O2性能研究
Construction of Na-CN/TiO2 composite S-scheme heterojunction and performance for photocatalytic H2O2 production
通过钠掺杂氮化碳(Na-CN)与TiO2(P25)复合构建了S型异质结光催化剂(Na-CN/T),实现了高效光催化产过氧化氢(H2O2)。在异丙醇溶液中,Na-CN/T的光催化产H2O2速率高达2 360.7 μmol/(g·h),较TiO2和未改性氮化碳(bulk-g-C3N4)分别提升2.1倍和82.7倍。实验结果表明,钠掺杂在氮化碳中引入了氮缺陷,有助于实现光生载流子的高效分离。Na-CN和TiO2的S型异质结的构建在保留复合催化剂强氧化还原能力的同时进一步提高了光生载流子的分离效率。
An S-scheme heterojunction photocatalyst (Na-CN/T) was constructed by composite of sodium-doped carbon nitride (Na-CN) and TiO2 (P25) to realize efficient photocatalytic hydrogen peroxide (H2O2) production.In isopropanol solution,the photocatalytic H2O2 production rate of Na-CN/T was as high as 2 360.7 μmol/(g·h),which was 2.1 and 82.7 times higher than that of TiO2 and unmodified carbon nitride (bulk-g-C3N4),respectively.Experimental results showed that sodium doping introduces nitrogen defects in carbon nitride,which helps to achieve efficient separation of photogenerated carriers.The construction of S-scheme heterojunction of Na-CN and TiO2 further improved the separation efficiency of photogenerated carriers while retaining the strong redox ability of the composite catalyst.
氮化碳 / 过氧化氢 / 掺杂 / S型异质结 / TiO2
carbon nitride / hydrogen peroxide / doping / S-scheme heterojunction / TiO2
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国家重点研发计划(2021YFB4000405)
国家重点研发计划(2019YFC1904500)
国家自然科学基金(52270115)
国家自然科学基金(52236003)
国家自然科学基金(21777080)
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