Surface functionalized multi-wall carbon nanotubes for degradation of organic dyes

被引：22
作者：
Shetty, Shivakumar Jagadish [1 ]
Shilpa, M. P. [1 ]
Bhat, Saideep Shirish [1 ]
Pavithra, K. S. [2 ]
Moorkoth, Sudheer [3 ]
Gupta, Ashutosh [3 ]
Surabhi, Srivathsava [4 ,5 ]
Shivamurthy, R. C. [6 ]
Gurumurthy, S. C. [1 ]
机构：
[1] Manipal Acad Higher Educ MAHE, Manipal Inst Technol, Dept Phys, Nano & Funct Mat Lab NFML, Manipal 576104, Karnataka, India
[2] GM Inst Technol, Res Ctr, Dept Chem, Davangere 577006, Karnataka, India
[3] Manipal Acad Higher Educ, Manipal Coll Pharmaceut Sci, Dept Pharmaceut Qual Assurance, Manipal 576104, Karnataka, India
[4] Univ Concepcion UdeC, Fac Ingn FI, Dept Ingn Mat DIMAT, Lab Nanocomp, Concepcion, Chile
[5] Univ Autonoma Nuevo Leon UANL, Fac Ciencias Fisico Matemat FCFM, Lab Nanociencias & Nanotecnol, San Nicolas De Los Garza 66451, Nuevo Leon, Mexico
[6] Manipal Acad Higher Educ, Manipal Inst Technol, Dept Mech & Ind Engn, Manipal 576104, Karnataka, India
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2024年 / 311卷
关键词：
Methylene blue; Indigo carmine; UV light irradiation; F-MWCNTs; Photocatalytic activity; Dye degradation; PHOTOCATALYTIC DEGRADATION; METHYLENE-BLUE; INDIGO CARMINE; WATER-TREATMENT; WASTE-WATER; MECHANICAL-PROPERTIES; COMPOSITE NANOFIBERS; ADSORPTION BEHAVIOR; REMOVAL; EFFICIENCY;
D O I：
10.1016/j.matchemphys.2023.128566
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Eliminating the hazardous dyes from the wastewater is essential for the sustainable furtherance of eco-friendly-oriented industrial growth. The untreated effluents containing dyes can damage the ecosystem and cause serious health issues to humans, animals, and aquatic species. In the present work, the multi-wall carbon nanotubes (MWCNTs) were functionalized using the combination of sulphuric acid and nitric acid. These functionalized multi-wall carbon nanotubes (F-MWCNTs) were characterized using Fourier transform infrared spectroscopy (FTIR) and energy dispersive X-ray analysis (EDAX) to confirm the presence of functional groups. The catalytic dye degradation efficiency of pristine multi-wall carbon nanotubes (P-MWCNTs) and F-MWCNTs was tested for methylene blue (MB), and indigo carmine (IC) dyes under dark and ultraviolet (UV) light exposure conditions. F-MWCNTs have exhibited appreciable degradation efficiency (similar to 90%) under dark and UV light compared to P-MWCNTs. An increment in efficiency was observed for UV-light-aided dye degradation. The impact of pH and temperature on degradation was analyzed in detail. The reaction kinetics was studied to determine the rate constants of the degradation reactions. A substantial quantum efficiency (QE) enhancement was noticed for F-MWCNTs compared to P-MWCNTs for both MB and IC degradation.
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页数：12
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