二维/二维S-型Bi3NbO7/g-C3N4异质结光催化剂驱动选择性CO2还原制CH4(英文) 人工光合作用可直接将二氧化碳转化为一系列碳氢化合物,实现大气中的碳循环,被视为一种既能解决能源短缺又能减少温室气体,进而改善人类生存环境的新型绿色技术.光催化... 王楷,冯雪真,上官杨子,... - 《Chinese Journal of Catalysis》...
还原反应光催化性能氮化碳(CNs)是一种较为廉价的非金属材料,拥有许多特殊的物化性质,如独特的半导电性,碱性,高硬度,高化学稳定性和高机械稳定性等.氮化碳是氮掺入碳阵列中形成,这不仅提供了一个带隙不超过2.7eV的电子结构,也有助于增强其场发射,光催化和碱催化,碳捕获和能量储存等性能.这为其在许多领域的...
采用原位红外分析了各样品光催化还原CO2反应过程的差异,发现Pd/CN-SA表面的CO2吸附态物种在可见光照射下更容易参与至后续的光催化还原反应中;PdOx/CN和Pd/CN-NP表面的CO2吸附态物种含量足够丰富,但由于它们的光生电子还原能力有限,无法...
但光生载流子易复 3 4 合,光吸收性能和反应活性位点有限等缺点限制了其光催化还原 CO2 的效率。针对上 述缺陷,本文开发了高活性、高稳定性、价格经济的助催化剂,有效提升了 CN 光催 化还原CO2 性能,为高效还原CO2 光催化剂的设计与开发做出有益的探索。 本文首先探究了非贵金属助催化剂Bi 纳米球修饰对g-C...
3、最近,g-c3n4基双z型异质结用于高效co2光催化转化的报道非常少,催化效果也不尽人意。因此,构建双z型g-c3n4基异质结是一个提升co2还原活性的潜在策略。 技术实现思路 1、本发明的目的就是为了克服上述现有技术存在的缺陷而提供一种双z型g-c3n4/bi3o4cl/cd0.5zn0.5s异质结光催化剂及其制备与应用。通过简单的...
As a result, Nb2O5@g-C3N4 (1 : 5) poBeBes outstanding properties for CO2 reduction under visible light wip pe production of CH4 and CO of about 19.06 and 1.93 渭mol g?1, respectively. The CH4 selectivity is up to 98.79%. Furpermore, pe mechanism of photocatalytic CO2 reduction is ...
PhotocatalyticreductionGoldCNCatalysisA series of Au-g-C3N4 (Au-CN) catalysts were prepared through a NaBH4-reduction method using g-C3N4 (CN) from pyrolysis of urea as precursor. The cata…[HailongLiYanGaoZhuoXiongChenLiaoKaiminApplied Surface Science...
Pd-g-C3N4/reduced graphene oxide aerogelPhotocatalysisHydrogenation of CO2 to CH4Photocatalysis has been known as a promising technique for environmental remediation and clean energy production. However, there are two weaknesses for photocatalyst in powder form applied in the gas-phase catalysis. One is...
By combining the reducing ability of the conduction band of g-C3N4 and the oxidizing ability of the valence band of Cs2AgBiBr6 perovskite, this Z-scheme system exhibits superior CH4 production in photocatalytic CO2 reduction, in contrast to the high CO selectivity for the heterojunction ...
The photocatalytic activity of these materials was studied in the photoreduction of CO2 with H2O as the reductant in the gaseous phase. The composites exhibited excellent photoactivity compared to undoped g-C3N4. The CH4 production rate over 10FeCN and 15FeCN composites (2.8×102 and 2.9×102μ...