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Novel 3-D nanoporous graphitic-C3N4 nanosheets with heterostructured modification for efficient visible-light photocatalytic hydrogen production

机译:具有异质结构修饰的新型3-D纳米多孔石墨C3N4纳米片材,可有效产生可见光光催化制氢

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摘要

Phosphorus-doped g-C3N4 (P-C3N4) nanosheets with unique 3-D nanoporous structures are synthesized for the first time in this work; such functional porous architectures coupled with BiPO4 nanorods can exhibit superior photocatalytic activity for hydrogen production. X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and UV-vis diffusive reflectance spectroscopy have been employed to characterize the heterostructured photocatalytic materials. The as-prepared composite photocatalyst show outstanding activity for photocatalytic hydrogen production under visible light (lambda > 420 nm). The composite photocatalyst with 3.0 wt% BiPO4 shows an optimum photocatalytic activity with a H-2-production rate of 1110 mu mol h(-1) g(-1). The enhanced photocatalytic activity for P-C3N4 coupled with BiPO4 comes from the high migration efficiency of photoinduced electrons on the interface of P-C3N4 and BiPO4.
机译:这项工作中首次合成了具有独特的3-D纳米多孔结构的磷掺杂g-C3N4(P-C3N4)纳米片。这样的功能性多孔结构与BiPO4纳米棒相结合,可表现出优异的光催化活性,可用于制氢。 X射线衍射(XRD),透射电子显微镜(TEM),扫描电子显微镜(SEM),X射线光电子能谱(XPS)和紫外可见漫反射光谱已被用于表征异质结构的光催化材料。所制备的复合光催化剂在可见光(λ> 420 nm)下显示出优异的光催化制氢活性。具有3.0 wt%BiPO4的复合光催化剂显示出最佳的光催化活性,其H-2-生成率为1110μmol h(-1)g(-1)。 P-C3N4与BiPO4偶联提高了光催化活性,这是由于P-C3N4和BiPO4界面上的光生电子具有很高的迁移效率。

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