知识与财富的链接
以太西无烟煤为原料,采用化学氧化法制备煤基碳量子点(C-CQDs),进一步以C-CQDs和尿素为前体,原位复合制备得到煤基碳量子点/氮化碳(C-CQDs/g-C3N4)复合材料。采用TEM、XRD、FT-IR、UV-Vis、PL等手段对样品结构性能进行了表征和分析,进而考察了其在光催化还原CO2合成甲醇过程的催化性能。研究表明:C-CQDs均匀地负载在g-C3N4的表面,且掺杂适量的C-CQDs有利于提高C-CQDs/g-C3N4的光催化活性,当可见光照12 h时,其光催化还原CO2甲醇产量最高可达28.69μmol/(g cat),约为相同条件下纯石墨相g-C3N4作用时甲醇产量的2.2倍。
Using Taixi anthracite as a raw material, coal-based carbon quantum dots (C-CQDs) were prepared by chemical oxidation, and C-CQDs and urea were used as precursors to prepare coal-based carbon quantum dots/carbon nitride (C-CQDs /g-C3N4) composite materials. The composition and structure of the samples were characterized by means of TEM, XRD, FT-IR, UV-Vis and PL respectively, and the phoyocatalytic potential were assessed in terms of reduction CO2 into methanol under visible light irradiation. The results show that the C-CQDs were uniformly decorated on the surfaces of the C-CQDs/g-C3N4 composite, and the C-CQDs/g-C3N4 exhibited superior photoactivity, the methanol yield up to 28.69 μmol/(g cat), which is about 2.2 times in comparison with that of pure graphite carbon nitride (g-C3N4) in photocatalytic CO2 reduction.
