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Bao J, Bai W, Wu M, Gong W, Yu Y, Zheng K, Liu L. Template-mediated copper doped porous g-C 3N 4 for efficient photodegradation of antibiotic contaminants. CHEMOSPHERE 2022; 293:133607. [PMID: 35032511 DOI: 10.1016/j.chemosphere.2022.133607] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 12/30/2021] [Accepted: 01/11/2022] [Indexed: 06/14/2023]
Abstract
Graphite carbon nitride (g-C3N4) has great potential to treat antibiotic wastewater, but limited by small specific surface area, rapid recombination of photogenerated carriers and narrow visible light absorption range. In order to solve above problems, we designed a simple template-mediated approach by supramolecular self-assembly (Cu-melamine-cyanuric acid) to prepare copper doped porous graphitic carbon nitride (Cu-pCN) photocatalyst. The pre-organized template self-assembly driven by hydrogen bonds and electrostatic interaction, resulted in highly porous structure. The specific surface area of Cu-pCN increased to 142.8 m2/g from 11.37 m2/g of conventional bulk g-C3N4. In addition, the doping of Cu endowed them with better light absorption, higher separation and transfer rate of photogenerated carriers. Consequently, the obtained Cu-pCN displayed the superior photocatalytic degradation rate for tetracycline (TC) and high recycling stability.
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Affiliation(s)
- Jie Bao
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, 928 Second Avenue, Xiasha Higher Education Park, Hangzhou, 310018, China
| | - Wending Bai
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, 928 Second Avenue, Xiasha Higher Education Park, Hangzhou, 310018, China
| | - Mingbang Wu
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, 928 Second Avenue, Xiasha Higher Education Park, Hangzhou, 310018, China
| | - Wenli Gong
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, 928 Second Avenue, Xiasha Higher Education Park, Hangzhou, 310018, China
| | - Yucong Yu
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, 928 Second Avenue, Xiasha Higher Education Park, Hangzhou, 310018, China
| | - Kang Zheng
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, 928 Second Avenue, Xiasha Higher Education Park, Hangzhou, 310018, China
| | - Lin Liu
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, 928 Second Avenue, Xiasha Higher Education Park, Hangzhou, 310018, China.
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Facile Preparation of Carbon Nitride-ZnO Hybrid Adsorbent for CO2 Capture: The Significant Role of Amine Source to Metal Oxide Ratio. Catalysts 2021. [DOI: 10.3390/catal11101253] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The presence of CO2 in gaseous fuel and feedstock stream of chemical reaction was always considered undesirable. High CO2 content will decrease quality and heating value of gaseous fuel, such as biohydrogen, which needs a practical approach to remove it. Thus, this work aims to introduce the first C3N4-metal oxide hybrid for the CO2 cleaning application from a mixture of CO2-H2 gas. The samples were tested for their chemical and physical properties, using field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), physical adsorption analysis (BET), fourier-transform infrared (FTIR), x-ray diffraction (XRD), and x-ray photoelectron spectroscopy (XPS). The CO2 capacity test was carried out by means of a breakthrough test at 1 atm and 25° C using air as a desorption system. Among the samples, amine/metal oxide mass ratio of 2:1 (CNHP500-2(2-1)) showed the best performance of 26.9 wt. % (6.11 mmol/g), with a stable capacity over 6 consecutive cycles. The hybrid sample also showed 3 times better performance than the raw C3N4. In addition, it was observed that the hydrothermal C3N4 synthesis method demonstrated improved chemical properties and adsorption performance than the conventional dry pyrolysis method. In summary, the performance of hybrid samples depends on the different interactive factors of surface area, pore size and distribution, basicity, concentration of amine precursors, ratio of amines precursors to metal oxide, and framework stability.
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Dolai S, Barrio J, Peng G, Grafmüller A, Shalom M. Tailoring carbon nitride properties and photoactivity by interfacial engineering of hydrogen-bonded frameworks. NANOSCALE 2019; 11:5564-5570. [PMID: 30860536 DOI: 10.1039/c9nr00711c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The rational synthesis of carbon nitride materials, ranging from polymeric carbon nitride to nitrogen-doped carbon, by supramolecular preorganization of their monomers is a powerful tool for the design of their morphology and photophysical and catalytic activities. Here we show a new facile and scalable approach for the synthesis of ordered CN materials with excellent photoactivity, which consists of supramolecular interfacial preorganization of CN monomers at the interface of two non-miscible solvents. Molecular dynamic simulations supported by experimental results reveal that an appropriate choice of monomers and solvents leads to the formation of a supramolecular assembly solely at the interface of the solvents. As a proof of concept, we show that the properties of the CN materials after thermal condensation can be tuned by adding an additional monomer to one solvent only. The advantages of the new method are demonstrated here through the tunable morphologies and surface area, the formation of new electronic junctions and high activity as a photocatalyst for hydrogen evolution and pollutant degradation of the CN materials.
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Affiliation(s)
- Susmita Dolai
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel.
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Vidyasagar D, Manwar N, Gupta A, Ghugal SG, Umare SS, Boukherroub R. Phenyl-grafted carbon nitride semiconductor for photocatalytic CO2-reduction and rapid degradation of organic dyes. Catal Sci Technol 2019. [DOI: 10.1039/c8cy02220h] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Molecular engineering of graphitic carbon nitride (g-C3N4) is achieved by the copolymerization of π-conjugated phenyl urea, melamine, and urea.
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Affiliation(s)
- Devthade Vidyasagar
- Materials and Catalysis Laboratory
- Department of Chemistry
- Visvesvaraya National Institute of Technology (VNIT)
- Nagpur
- India
| | - Nilesh Manwar
- Chemical and Materials Science Division (CMSD)
- CSIR-Indian Institute of Petroleum (IIP)
- Dehradun
- India
| | - Akanksha Gupta
- Materials and Catalysis Laboratory
- Department of Chemistry
- Visvesvaraya National Institute of Technology (VNIT)
- Nagpur
- India
| | | | - Suresh S. Umare
- Materials and Catalysis Laboratory
- Department of Chemistry
- Visvesvaraya National Institute of Technology (VNIT)
- Nagpur
- India
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Huy TH, Bui DP, Kang F, Wang YF, Liu SH, Thi CM, You SJ, Chang GM, Pham VV. SnO 2/TiO 2 nanotube heterojunction: The first investigation of NO degradation by visible light-driven photocatalysis. CHEMOSPHERE 2019; 215:323-332. [PMID: 30321811 DOI: 10.1016/j.chemosphere.2018.10.033] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 10/04/2018] [Accepted: 10/06/2018] [Indexed: 05/22/2023]
Abstract
Titania (TiO2) as a commercial photocatalyst has been continually struggling due to the limitation of ultraviolet light response and the high recombination rate of photoinduced carriers. The development of heterojunction nanostructures provides great promise to achieve the activation by visible light and suppress the photoinduced electron-hole pairs recombination. Herein, we synthesized a SnO2 and TiO2 nanotube heterojunction (SnO2/TNT) via a one-step hydrothermal strategy and systematically investigated NO photocatalytic degradation over the SnO2/TNTs heterojunction under visible light at the parts per billion level. Various physicochemical characterization techniques were conducted to verify the physical and chemical properties of the materials. For example, the morphology and lattice spacings of the materials were examined by high-resolution TEM (HR-TEM) images and selected area electron diffraction (SAED) pattern, X-ray photoelectron spectroscopy (XPS) was employed to study the oxidation states and propose the band alignment diagram of the SnO2/TNTs heterojunction, and photoluminescence spectroscopy was employed for understanding of carrier's trapping, migration and transfer. The photocatalytic results show that the SnO2/TNTs heterojunction exhibits the superior photocatalytic performance, and the photocatalytic degradation efficiency of NO can reach 60% under visible light with effective inhibition of NO2 production. The excellent photocatalytic ability is due to the low recombination rate of the photoinduced electron-hole pairs. Furthermore, a trapping experiment was combined with electron spin resonance (ESR) and utilized to identify the involvement of reactive radicals in the photocatalysis process suggesting that and OH mediated pathways play a predominant role in NO removal.
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Affiliation(s)
- Tran Hong Huy
- Faculty of Materials Science and Technology, University of Science, VNU-HCM, Ho Chi Minh City, 700000, Viet Nam
| | - Dai Phat Bui
- Faculty of Materials Science and Technology, University of Science, VNU-HCM, Ho Chi Minh City, 700000, Viet Nam
| | - Fei Kang
- Department of Environmental Engineering, Chung Yuan Christian University, Taoyuan, 32023, Taiwan
| | - Ya-Fen Wang
- Department of Environmental Engineering, Chung Yuan Christian University, Taoyuan, 32023, Taiwan
| | - Shou-Heng Liu
- Department of Environmental Engineering, National Cheng Kung University, Tainan, 70101, Taiwan
| | - Cao Minh Thi
- Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh City, 700000, Viet Nam
| | - Sheng-Jie You
- Department of Environmental Engineering, Chung Yuan Christian University, Taoyuan, 32023, Taiwan
| | - Gen-Mu Chang
- Department of Environmental Engineering, Chung Yuan Christian University, Taoyuan, 32023, Taiwan.
| | - Van Viet Pham
- Faculty of Materials Science and Technology, University of Science, VNU-HCM, Ho Chi Minh City, 700000, Viet Nam.
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Barrio J, Shalom M. Rational Design of Carbon Nitride Materials by Supramolecular Preorganization of Monomers. ChemCatChem 2018. [DOI: 10.1002/cctc.201801410] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Jesús Barrio
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology; Ben-Gurion University of the Negev; Beer-Sheva 8410501 Israel
| | - Menny Shalom
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology; Ben-Gurion University of the Negev; Beer-Sheva 8410501 Israel
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Chen Z, Lu S, Wu Q, He F, Zhao N, He C, Shi C. Salt-assisted synthesis of 3D open porous g-C 3N 4 decorated with cyano groups for photocatalytic hydrogen evolution. NANOSCALE 2018; 10:3008-3013. [PMID: 29372745 DOI: 10.1039/c7nr05927b] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Three-dimensional open porous graphitic carbon nitride with cyano groups (3D OPG-C3N4-CN) has been fabricated by a facile two-step process that combines NaCl-assisted freeze-drying with calcination. NaCl not only works as a template for the 3D open porous structure, but also facilitates the decomposition of g-C3N4 around 500 °C to some extent. Meanwhile, a moderate amount of cyano groups acting as electron capture centers are introduced at the edge of the 3D open porous g-C3N4 during the formation process. Compared with bulk g-C3N4 without NaCl assistance, the 3D OPG-C3N4-CN exhibits improved light absorption, reduced carrier recombination and more active sites. As a result, the enhanced hydrogen production of 3D OPG-C3N4-CN reaches up to 1590 μmol h-1 g-1 when using Pt as a cocatalyst, which is about six times as much as that of the bulk g-C3N4.
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Affiliation(s)
- Zhangfa Chen
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials, Tianjin University, Weijin Road, No. 92, Tianjin 300072, PR China.
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