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Robust Photocatalytic H2O2 Production over Inverse Opal g‑C3N4 with Carbon Vacancy under Visible Light
journal contribution
posted on 2019-09-06, 12:38 authored by Juying Lei, Bin Chen, Weijia Lv, Liang Zhou, Lingzhi Wang, Yongdi Liu, Jinlong ZhangIn the field of green
chemistry, producing hydrogen peroxide (H2O2) via photocatalysis could be a promising method
for obtaining chemical feedstock during industrial and environmental
processes. Herein, we simultaneously introduced inverse opal (IO)
structure and carbon vacancies (CVs) into carbon nitride to improve
H2O2 production by photocatalysis. Experimental
results reveal that, after visible light irradiation for 2 h, IO carbon
nitride (IO CN-Cv) shows a H2O2 generation value
of 325.74 μM over 1.69, 2.13, and 1.84 times more than the H2O2 generation of bulk CN-Cvs (bulk carbon nitride
with Cvs), bulk CN (bulk carbon nitride without Cvs), and nanosheet
CN (carbon nitride nanosheet), respectively. On the one hand, the
typical IO structure improves the efficiency of visible light absorption
and simultaneously provides more surface area for the adsorption of
molecular oxygen. Meanwhile, the introduction of Cvs improves the
separation ability of carriers. This study offers a new idea for enhanced
production of H2O2 using visible light with
metal-free materials in the era of energy shortage.
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surface areahydrogen peroxidecarbon vacanciesbulk carbon nitride2 hExperimental resultslight irradiationRobust Photocatalytic H 2 O 2 ProductionH 2 O 2 generationseparation abilityIO CN-Cvnanosheet CNIO structureenergy shortageVisible Light325.74 μ MH 2 O 2 generation valuelight absorptioncarbon nitridemetal-free materialsCarbon VacancyCVH 2 O 2 productionH 2 O 2chemical feedstockIO carbon nitride1.84 timesbulk CN-Cvs
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