Article
Chemistry, Multidisciplinary
Haoyi Li, Muchun Fei, Jennifer L. Troiano, Lu Ma, Xingxu Yan, Peter Tieu, Yucheng Yuan, Yuhan Zhang, Tianying Liu, Xiaoqing Pan, Gary W. Brudvig, Dunwei Wang
Summary: We propose a strategy to achieve oxidative CH4 carbonylation through immobilized Ir complexes on an oxide support. Our immobilization approach enables direct CH4 activation and facilitates easy separation and reutilization of the catalyst. Furthermore, we demonstrate that methyl migration is sensitive to the electrophilicity of carbonyl, which can be tuned by a gentle reduction to the Ir centers. The reduced catalyst featuring predominantly Ir(III) increases CH3OH production but reduces CH3COOH yield compared to the as-prepared catalyst mainly featuring Ir(IV).
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Yelan Xiao, Yecheng Leng, Xinxin Lu, Shun-Cheung Cheng, Hao Huang, Man-Kit Tse, Jiechun Liang, Wenguang Tu, Chi-Chiu Ko, Xi Zhu, Lu Wang, Yong Zhou, Yingfang Yao, Zhigang Zou
Summary: Photocatalytic radical fluoroalkylation is an important method to prepare organofluorine compounds. This study introduces a cost-effective and recyclable heterogeneous photocatalysis using cyano-modified graphitic carbon nitride as the photocatalyst. The photocatalytic process is attributed to the long-lived triplet excited states and the strong interaction between the catalyst and substrate. Moreover, the catalyst shows high performance, wide reaction scope, and can be easily recovered and reused for multiple catalytic cycles.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Physical
Wanessa L. Oliveira, Meiriele Antunes Ferreira, Henrique A. J. L. Mourao, Manoel J. M. Pires, Vinicius Ferreira, Honoria F. Gorgulho, Daniel F. Cipriano, Jair C. C. Freitas, Valmor R. Mastelaro, Otaciro R. Nascimento, Dalva E. C. Ferreira, Frederico Ramos Fioravante, Marcio C. Pereira, Joao P. de Mesquita
Summary: This study demonstrates that oxygenated graphitic carbon nitride (g-C3N4) prepared at different temperatures can degrade indigo carmine with hydrogen peroxide in the dark by a reaction similar to a conventional Fenton's reaction. The Fenton-like activity is directly related to the oxygenated functional groups on g-C3N4 structure, mainly -OH functional groups, suggesting a potential alternative to traditional metal catalysts in Fenton-like reactions for advanced oxidation.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Review
Engineering, Electrical & Electronic
Chuanlin Dai, Zihang Feng, Qiming Hu, Jiangyuan Qiu, Junhua You, Rui Guo, Xuanwen Liu, Hangzhou Zhang
Summary: This paper reviews the recent progress in the study of CN-based catalyst modification and composite strategies in the field of photo-Fenton. Three main modification strategies of CN and binary/ternary composite strategies based on CN are introduced. In addition, the charge transfer mechanism of heterojunction and CDs inserted CN are discussed. The current challenges and possible future directions of CN-based photo-Fenton catalysts are presented.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Chemistry, Physical
Shibiru Yadeta Ejeta, Toyoko Imae
Summary: Oxygen-doped graphitic carbon nitride (Og-CN) was synthesized and applied as a promising photocatalyst for the degradation of 2,4-dichlorophenoxyacetic acid in aqueous phase. Og-CN showed higher degradation efficiency compared to untreated g-CN, with UV light irradiation being more effective than visible light and good stability in repeated photocatalytic cycles. The photoreaction mechanism study confirmed the reactivity order of O-2(center dot-) > (OH)-O-center dot > h(+).
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Green & Sustainable Science & Technology
Varsha Raj Govindaraju, Kempahanumakkagari Sureshkumar, Thippeswamy Ramakrishnappa, Sreeramareddygari Muralikrishna, Devaramani Samrat, Ranjith Krishna Pai, Vanish Kumar, Kumar Vikrant, Ki-Hyun Kim
Summary: Graphitic carbon nitride (g-C3N4) has great potential in photocatalytic applications, but its electrochemical applicabilities are limited by low electrical conductivity. Enhancing electrocatalytic activity through doping and alloying can unlock greater potential for g-C3N4 in environment and energy sectors in the future.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Nanoscience & Nanotechnology
Danyang Sun, Rui Gao, Qiyong Liao, Zihui Meng, Wenfang Liu
Summary: This study focuses on improving the catalytic performance by introducing nanoporous structure into graphite carbon nitride. Modifying the nanoporous graphite carbon nitride with different aromatic compounds can effectively enhance the regeneration efficiency of nicotinamide adenine dinucleotide.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Shenghong Dong, Mingzhe Chen, Jiarui Zhang, Jinzhu Chen, Yisheng Xu
Summary: The plasmonic photocatalyst Pd/g-C3N4 shows excellent catalytic activity in the photo-induced hydrogenation of biomass-based aldehydes under visible-light irradiation. The Pd atom is identified as the true catalytic active site, and the photo-promoted reduction mainly occurs through the effect of surface plasmon resonance induced by noble metal nanoparticles.
GREEN ENERGY & ENVIRONMENT
(2021)
Article
Chemistry, Physical
Kathiravan Murugesan, Arunachalam Sagadevan, Lu Peng, Oleksandr Savateev, Magnus Rueping
Summary: In this study, a simple and scalable method for synthesizing aldehydes, ketones, and amides from abundant raw materials was developed. The method utilizes a photoactive catalyst and molecular oxygen, and has potential applications in drug development and understanding biological pathways.
Article
Chemistry, Physical
Cafer Saka
Summary: The surface properties of graphitic carbon nitride (GCN) were enhanced by doping with sulphur (S), boron (B), and oxygen (O). Metal-free GCN catalysts with heteroatom dopants showed improved surface functional groups and a carbon defect structure. These catalysts were used for hydrogen production from sodium borohydride (SB) methanolysis, resulting in a 2.2-fold increase in H2 production compared to GCN. The HGR value obtained with B, O, and S doped GCN was 9166 ml min-1g-1. XPS, SEM-EDX, TEM, FTIR, and XRD analyses were performed to investigate the structural properties of the catalysts, and the activation energy (Ea) for B, O, and S doped GCN was determined to be 28.89 kJ mol-1.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Review
Chemistry, Physical
Meng Zhao, Jing Feng, Weiting Yang, Shuyan Song, Hongjie Zhang
Summary: Single-atom catalysts are a highly active field in catalysis research, known for their unique performance in various chemical reactions. However, maintaining atomic level dispersion and preventing the aggregation of nanoclusters is a challenge due to the increased surface energy. Graphitic carbon nitride is a promising two-dimensional support for stabilizing isolated metal atoms, thanks to its abundant pyridine-like nitrogen atoms and unique structure originating from carbon-nitrogen interactions.
Review
Environmental Sciences
Dhruti Sundar Pattanayak, Dharm Pal, Jyoti Mishra, Chandrakant Thakur, Kailas L. Wasewar
Summary: Tetracyclines (TCs) antibiotics are widely used in human and veterinary medicines, but their active residues released into the environment pose risks to ecosystems and human health. Photodegradation using graphitic carbon nitride (g-C3N4) as a photocatalyst provides a promising solution for complete antibiotic degradation. Doping g-C3N4 with elements improves its activity, broadens its light-responsive range, and reduces electron-hole recombination. This review discusses the design and efficiency of doped g-C3N4 for TCs degradation in aquatic environments.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Onkar Sudhir Ekande, Mathava Kumar
Summary: The study investigated the activation of persulfate in the presence of blue LED light using acetic acid modified graphitic carbon nitride and its application in metronidazole removal. The results showed an improvement in specific surface area and reduced charge transfer resistance in ACN. The main reactive species identified was sulfate radicals, while holes in the valence band of ACN played a minor role in metronidazole removal.
Article
Chemistry, Physical
Shici Zhang, Jiaqi Chen, Chao Fang, Ying Zhang, Zhihua Xu, Zhaoxiong Yan, Kun Yao
Summary: In this study, carbonyl groups (C=O) were introduced onto the graphitic carbon nitride (g-C3N4) through a condensation reaction in acetic acid solution, resulting in enhanced photocatalytic degradation efficiency of antibiotics in wastewater. The introduction of carbonyl groups provided more collection sites for photogenerated electrons, facilitating the separation of electron-hole pairs and improving the photocatalytic performance.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Physical
Petr Praus
Summary: The electronegativity values of graphitic carbon nitride (g-C3N4) are complex and vary based on different calculation methods, ranging from 4.64-4.77eV and 3.79-4.62eV. Experimental verification is recommended for accurately determining the conduction band potentials of g-C3N4.