Bifunctional hydroxyl group over polymeric carbon nitride to achieve photocatalytic H2O2 production in ethanol aqueous solution with an apparent quantum yield of 52.8% at 420 nm

Hydroxyl group modified polymeric carbon nitride achieves efficient photoreduction of O2 to H2O2 and highly selective photooxidization of C2H5OH simultaneously.

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Remarkably high apparent quantum yield of the overall photocatalytic H2O splitting achieved by utilizing Zn ion added Ga2O3 prepared using dilute CaCl2 solution

Chemical Communications ◽

10.1039/c5cc03483c ◽

2015 ◽

Vol 51 (65) ◽

pp. 12935-12938 ◽

Cited By ~ 53

Author(s):

Yoshihisa Sakata ◽

Takuya Hayashi ◽

Ryō Yasunaga ◽

Nobuyuki Yanaga ◽

Hayao Imamura

Keyword(s):

Aqueous Solution ◽

Photocatalytic Activity ◽

Quantum Yield ◽

High Photocatalytic Activity ◽

Apparent Quantum Yield ◽

Cacl2 Solution

Remarkably high photocatalytic activity for the overall H2O splitting was achieved by utilizing a Rh0.5Cr1.5O3(Rh; 0.5 wt%)/Zn(3 mol%)–Ga2O3 photocatalyst when Ga2O3 was prepared using dilute CaCl2 aqueous solution (0.001 mol l−1).

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Molecular engineering of polymeric carbon nitride for highly efficient photocatalytic oxytetracycline degradation and H2O2 production

Applied Catalysis B Environmental ◽

10.1016/j.apcatb.2020.118970 ◽

2020 ◽

Vol 272 ◽

pp. 118970 ◽

Cited By ~ 35

Author(s):

Yang Yang ◽

Guangming Zeng ◽

Danlian Huang ◽

Chen Zhang ◽

Donghui He ◽

...

Keyword(s):

Carbon Nitride ◽

Molecular Engineering ◽

H2o2 Production ◽

Highly Efficient ◽

Polymeric Carbon

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Mechanistic analysis of multiple processes controlling solar-driven H2O2 synthesis using engineered polymeric carbon nitride

Nature Communications ◽

10.1038/s41467-021-24048-1 ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

Yubao Zhao ◽

Peng Zhang ◽

Zhenchun Yang ◽

Lina Li ◽

Jingyu Gao ◽

...

Keyword(s):

Active Sites ◽

Carbon Nitride ◽

Separation Efficiency ◽

Structural Features ◽

Reduction Reaction ◽

Transformation Process ◽

Photon Absorption ◽

Apparent Quantum Yield ◽

Dioxygen Reduction ◽

Polymeric Carbon

AbstractSolar-driven hydrogen peroxide (H2O2) production presents unique merits of sustainability and environmental friendliness. Herein, efficient solar-driven H2O2 production through dioxygen reduction is achieved by employing polymeric carbon nitride framework with sodium cyanaminate moiety, affording a H2O2 production rate of 18.7 μmol h −1 mg−1 and an apparent quantum yield of 27.6% at 380 nm. The overall photocatalytic transformation process is systematically analyzed, and some previously unknown structural features and interactions are substantiated via experimental and theoretical methods. The structural features of cyanamino group and pyridinic nitrogen-coordinated soidum in the framework promote photon absorption, alter the energy landscape of the framework and improve charge separation efficiency, enhance surface adsorption of dioxygen, and create selective 2e− oxygen reduction reaction surface-active sites. Particularly, an electronic coupling interaction between O2 and surface, which boosts the population and prolongs the lifetime of the active shallow-trapped electrons, is experimentally substantiated.

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Identification and Analysis of Multiple Factors Controlling Solar-driven H2O2 Synthesis Using Engineered Polymeric Carbon Nitride

10.21203/rs.3.rs-74522/v1 ◽

2020 ◽

Author(s):

Yubao Zhao ◽

Jingyu Gao ◽

Lina Li ◽

Sheng Chen ◽

Chun Hu ◽

...

Keyword(s):

Carbon Nitride ◽

Reduction Process ◽

Transformation Process ◽

Photon Absorption ◽

Apparent Quantum Yield ◽

Environmental Friendliness ◽

Dioxygen Reduction ◽

Time Regime ◽

P Type ◽

Polymeric Carbon

Abstract Solar-driven hydrogen peroxide (H2O2) production presents unique merits of sustainability and environmental friendliness. Herein, highly efficient solar-driven H2O2 production through dioxygen reduction is achieved by employing polymeric carbon nitride (PCN) framework with sodium cyanaminate moiety (PCN-NaCA), affording a superior H2O2 production rate of 175 μmol/h on 10 mg photocatalyst and a notable apparent quantum yield of 27.6% at 380 nm. The overall photocatalytic transformation process is systematically analyzed using various steady-state/transient spectroscopic and computational methods. The presence of sodium cyanaminate moiety in PCN-NaCA induces the following multiple effects: enhancing photon absorption, creating the coexistence of p-type and n-type domains, strengthening surface adsorption of dioxygen, and favoring highly selective 2e− ORR. In particular, the adsorption of dioxygen on PCN-NaCA enhances the population and lifetime of trapped electrons in the ps-ns time regime, which should have a notable synergic effect on oxygen reduction process.

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Pyrene-functionalized polymeric carbon nitride with promoted aqueous–organic biphasic photocatalytic CO2 reduction

Journal of Materials Chemistry A ◽

10.1039/c8ta09801h ◽

2019 ◽

Vol 7 (13) ◽

pp. 7373-7379 ◽

Cited By ~ 17

Author(s):

Xuezhong Gong ◽

Sijia Yu ◽

Meili Guan ◽

Xianglin Zhu ◽

Can Xue

Keyword(s):

Aqueous Solution ◽

Organic Phase ◽

Carbon Nitride ◽

Co2 Reduction ◽

Alkene Oxidation ◽

Polymeric Carbon

Covalently grafting pyrene groups on polymeric carbon nitride enables photocatalytic CO2 reduction in aqueous solution with simultaneous alkene oxidation in organic phase.

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Hydroxyl group modified polymeric carbon nitride with highly selective hydrogenation of nitrobenzene to N-phenylhydroxylamine under visible light

Green Chemistry ◽

10.1039/d1gc00325a ◽

2021 ◽

Author(s):

Linjuan Pei ◽

Hao Tan ◽

Meixian Liu ◽

Ruiyi Wang ◽

Xianmo Gu ◽

...

Keyword(s):

Visible Light ◽

Surface Properties ◽

Selective Hydrogenation ◽

Carbon Nitride ◽

Reduction Reaction ◽

Hydroxyl Group ◽

Nitrobenzene Reduction ◽

Polymeric Carbon

Regulating the surface properties of catalysts to control the selectivity of reaction is fascinating. The bulk polymeric carbon nitride exhibited poor N-phenylhydroxylamine yield in nitrobenzene reduction reaction mainly due to...

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Dissolution and Performing Homogeneous Photocatalysis of Polymeric Carbon Nitride

10.26434/chemrxiv.6959627 ◽

2018 ◽

Author(s):

Chaofeng Huang ◽

Jing Wen ◽

Yanfei Shen ◽

Fei He ◽

Li Mi ◽

...

Keyword(s):

Conjugated Polymer ◽

Carbon Nitride ◽

Heterogeneous Catalysts ◽

Methane Sulfonic Acid ◽

Environment Friendly ◽

The Poor ◽

Catalytic Sites ◽

Homogeneous Photocatalysis ◽

Polymeric Carbon ◽

First Time

<a></a><a>As a metal-free conjugated polymer, carbon nitride (CN) has attracted tremendous attention as heterogeneous (photo)catalysts. </a><a></a><a>By following prototype of enzymes, making all catalytic sites of accessible via homogeneous reactions is a promising approach toward maximizing CN activity, but hindered due to </a><a></a><a>the poor insolubility of CN</a>. Herein, we report the dissolution of CN in environment-friendly methane sulfonic acid and the homogeneous photocatalysis driven by CN for the first time with the activity boosted up to 10-times, comparing to the heterogeneous counterparts. Moreover, facile recycling and reusability, the <a>hallmark</a> of heterogeneous catalysts, were kept for the homogeneous CN photocatalyst via reversible precipitation using poor solvents. It opens new vista of CN in homogeneous catalysis and offers a successful example of polymeric catalysts in bridging gaps of homo/heterogeneous catalysis.

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