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Online since: February 2023
Authors: T. Sajini, T.R. Sreelakshmi, Beena Mathew
Fabrication of Vinyl Functionalised Multiwalled Carbon Nanotubes for the Removal of Organic Pollutant
Sreelakshmi T.R.1,a, Sajini T.2,b*, and Beena Mathew 3,c
1Department of Chemistry, Newman College, Affiliated to Mahatma Gandhi University, Kerala, India
2Department of Chemistry, St Berchmans College (Autonomous), Affiliated to Mahatma Gandhi University, Changanassery P O, Kottayam-686101, Kerala, India
3School of Chemical Sciences, Mahatma Gandhi University, Priyadarshini Hills P O, Kottayam -686560, Kerala, India
asreelakshmitr07@gmail.com, bsajinijose7@gmail.com, cbeenam4@gmail.com
Keywords: MWCNT; vinyl functionalization; 9-vinyl anthracene; organic pollutant.
5
Abstract.
Carbon nanotubes applications in various materials chemistry fields have been progressively developed.
Due to CNTs highly porous-hollow structure, large specific surface area, and light mass density, there is a strong interaction between CNTs and adsorbate molecule during adsorption [21,22].
The image of MWCNT revealed that the crude multiwalled nanotubes are entangled with one another and form a cross-linked structure due to the presence of impurities.
Prato, Chemistry of Carbon Nanotubes, Chem.
Carbon nanotubes applications in various materials chemistry fields have been progressively developed.
Due to CNTs highly porous-hollow structure, large specific surface area, and light mass density, there is a strong interaction between CNTs and adsorbate molecule during adsorption [21,22].
The image of MWCNT revealed that the crude multiwalled nanotubes are entangled with one another and form a cross-linked structure due to the presence of impurities.
Prato, Chemistry of Carbon Nanotubes, Chem.
Online since: February 2026
Authors: Rolland Djomi, Chualeu Parfait Michel Touani, Adolphe Claudel Hamka Hamka, Theodore Tchotang, Roland Olembe, Gael Delore Kan
For thermal properties
To evaluate the thermal properties, we took measurements between 100 and 120 mg for each test piece for analysis using a “LENSEIS” brand electrical device with an alumina oxide crucible and a capacity of 150 mg; the heating rate is 10°/min, the gases used are oxygen and nitrogen, and the analysis is carried out at the Laboratory of Physical and Analytical Chemistry at the University of Yaoundé I.
1.4.
The data was processed using Origin software from the Research Unit in Pollution Chemistry and Environmental Engineering at the University of Dschang [14]. 2.
Thermal properties The machine is a "LENSEIS" electric device from the organic chemistry laboratory of the University of Yaoundé 1, with an alumina oxide crucible and a capacity of 150 mg.
The analyses are carried out by the Research Unit in Environmental Chemistry and Engineering at the University of Dschang [14].
[17] Traore, B. (2018), Development and characterisation of a composite structure (sand and recycled plastic waste): Strength improvement using clay fillers, (Doctoral dissertation, University of Bourgogne France-Comté; University of Félix Houphouët-Boigny (Abidjan, Ivory Coast))
The data was processed using Origin software from the Research Unit in Pollution Chemistry and Environmental Engineering at the University of Dschang [14]. 2.
Thermal properties The machine is a "LENSEIS" electric device from the organic chemistry laboratory of the University of Yaoundé 1, with an alumina oxide crucible and a capacity of 150 mg.
The analyses are carried out by the Research Unit in Environmental Chemistry and Engineering at the University of Dschang [14].
[17] Traore, B. (2018), Development and characterisation of a composite structure (sand and recycled plastic waste): Strength improvement using clay fillers, (Doctoral dissertation, University of Bourgogne France-Comté; University of Félix Houphouët-Boigny (Abidjan, Ivory Coast))
Online since: March 2026
Authors: Tien Chien Jen, Adedotun Adetunla, Ngozi Enemuo, Uchenna Godwin Azubuike
Atomic layer deposition (ALD) is emerging as a desirable modification technique for achieving uniform and improved membrane structures.
This uniformity extends across complex geometries, including the inner surfaces of porous membranes and high-aspect-ratio structures, ensuring consistent functionalization without clogging or blocking pores [22].
Integration of ALD with Membrane Technology Integrating ALD with membrane technology represents a significant advancement in membrane modification, offering the potential to fabricate membranes with exceptional control over pore structure, surface chemistry, and functional stability.
As sustainability becomes a core concern, green ALD chemistries are expected to gain traction.
Achieving these feats will involve collaborations across disciplines, including membrane science, surface chemistry, nanotechnology, and process engineering.
This uniformity extends across complex geometries, including the inner surfaces of porous membranes and high-aspect-ratio structures, ensuring consistent functionalization without clogging or blocking pores [22].
Integration of ALD with Membrane Technology Integrating ALD with membrane technology represents a significant advancement in membrane modification, offering the potential to fabricate membranes with exceptional control over pore structure, surface chemistry, and functional stability.
As sustainability becomes a core concern, green ALD chemistries are expected to gain traction.
Achieving these feats will involve collaborations across disciplines, including membrane science, surface chemistry, nanotechnology, and process engineering.
Online since: December 2010
Authors: Marek Pietrow, J. Wawryszczuk
In our previous paper [3] it was suggested that the structure of traps in alkanes is related to their crystalline structure; the temperature dependence of the positronium intensity seemed to be different for C24, which has trigonal structure [4], than for C36, which is monoclinic.
In this work we present the results of experiments describing the depth of traps for a set of alkanes with different crystal structures.
The traps emptied by the 2.2 μm light appear in long chain alkanes only, thus it seemed plausible to ascribe their origin to different crystalline structures of these media – the change of structure from triclinic/monoclinic occurs for even alkanes at n=24/n=26.
The properties of electron traps in mixed structures need further study.
Byakov in: Principles and Applications of Positron and Positronium Chemistry, edited by Y.C.
In this work we present the results of experiments describing the depth of traps for a set of alkanes with different crystal structures.
The traps emptied by the 2.2 μm light appear in long chain alkanes only, thus it seemed plausible to ascribe their origin to different crystalline structures of these media – the change of structure from triclinic/monoclinic occurs for even alkanes at n=24/n=26.
The properties of electron traps in mixed structures need further study.
Byakov in: Principles and Applications of Positron and Positronium Chemistry, edited by Y.C.
Online since: July 2011
Authors: Xiang Rong Ma, Zhi Fang Zhang, Fang Yan Du
Controlled Fabrication and Properties of Ce0.5Zr0.5O2 Solid Solutions
Zhifang Zhang1, a, Fangyan Du1,b, Xiangrong Ma1, c
1School of Chemistry and Chemical Engineering, Yulin University, Yulin 719000, China
azhifang889@sohu.com, bdeng-bw@sohu.com, cmaxiangrong615@163.com
Keywords: Ce0.5Zr0.5O2 solid solution, sol-gel method, ionic liquids.
The samples were characterized in the aspects of pore structure and surface morphology.
The pore structure may be influenced by the varying calcination temperature of the sample.
These results indicated that the pore structure was significantly affected by the calcination temperatures.
These results are well agreeable with the HRTEM observations shown in Fig. 1, suggested that the structure of the CZA solid solution calcined at 773 K had full interconnected porosity and hierarchical structure.
The samples were characterized in the aspects of pore structure and surface morphology.
The pore structure may be influenced by the varying calcination temperature of the sample.
These results indicated that the pore structure was significantly affected by the calcination temperatures.
These results are well agreeable with the HRTEM observations shown in Fig. 1, suggested that the structure of the CZA solid solution calcined at 773 K had full interconnected porosity and hierarchical structure.
Online since: November 2013
Authors: Mohamad Rusop, N.A.M. Asib, Aadila Aziz, Nurul Afaah Abdullah, Zuraida Khusaimi
Besides that, porous ZnO films must be deposited in controlled scale of film surfaces, either nano or micro-scale structures in order to improve the photocatalytic activity[10].
This revealed that the needle-like ZnO formed on TiO2 nanoparticles are hexagonal with a wurtzite structure as reported by Li Shi Wang et al.[18].
The XRD results showed the needle-like ZnO formed on TiO2 nanoparticles are hexagonal with a wurtzite structure.
References [1] Yi-Mu Lee and Hsi-WenYang, "Optimization of processing parameters on the controlled growth of ZnO nanorod arrays for the performance improvement of solid-state dye-sensitized solar cells," Journal of Solid State Chemistry, vol. 184, pp. 615-623, 2011
Rusop, "Controlled Growth of Zinc Oxide Nanorods by Aqueous-Solution Method," Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry, vol. 40, pp. 190–194, 2010.
This revealed that the needle-like ZnO formed on TiO2 nanoparticles are hexagonal with a wurtzite structure as reported by Li Shi Wang et al.[18].
The XRD results showed the needle-like ZnO formed on TiO2 nanoparticles are hexagonal with a wurtzite structure.
References [1] Yi-Mu Lee and Hsi-WenYang, "Optimization of processing parameters on the controlled growth of ZnO nanorod arrays for the performance improvement of solid-state dye-sensitized solar cells," Journal of Solid State Chemistry, vol. 184, pp. 615-623, 2011
Rusop, "Controlled Growth of Zinc Oxide Nanorods by Aqueous-Solution Method," Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry, vol. 40, pp. 190–194, 2010.
Online since: January 2016
Authors: Worapong Thiemsorn, Tida Tungyai, Heiko Hessenkemper
Study of the Structures and Physical Properties of Calcium Borophosphate Glass Containing Transition Metal Oxides
Worapong Thiemsorn1,a, Tida Tungyai1,b and Heiko Hessenkemper2,c
1Department of Industrial Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand
2Institute of Ceramic, Glass and Construction Materials, Freiberg University of Mining Technology, Freiberg, 09596, Germany
aworapong.t@cmu.ac.th, bTida.tungyai@gmail.com, chessenke@mailserver.tu-freiberg.de
Keywords: Calcium borophosphate; Glass; Transition oxide; Physical properties; Tetrahedral site
Abstract.
The structures and physical properties were investigated.
The structures of CBF glass were investigated using Fourier transformed infrared spectroscopy (FTIR).
It indicated that all glasses had an amorphous structure without evidence of crystallization.
From the results of structure analyses and physical properties, the relationship between the properties and structure changes of the glasses due to the incorporation of CeO2, Sb2O3 and CoO were established.
The structures and physical properties were investigated.
The structures of CBF glass were investigated using Fourier transformed infrared spectroscopy (FTIR).
It indicated that all glasses had an amorphous structure without evidence of crystallization.
From the results of structure analyses and physical properties, the relationship between the properties and structure changes of the glasses due to the incorporation of CeO2, Sb2O3 and CoO were established.
Online since: December 2012
Authors: Zhao Hua Jiang, Miao Wang, Yun Long Wang, Ming Zhou
Characterization of graphite containing ceramic coating prepared on carbon steel by plasma electrolytic oxidation
Yunlong Wang1,* , Miao Wang1,2, Ming Zhou1,* and Zhaohua Jiang3
1Center for photon Manufacturing Science and Technology, School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013,China
2Research institution of new materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013,China
3School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001, China
Corresponding author, Tel/fax: 86-511-88790191, E-mail: Wangyunlonghit@yahoo.com.cn
Co- Corresponding author, Tel/fax: 86-511-88790191, E-mail: Mingzhou@ujs.edu.cn
Keywords: Plasma electrolytic oxidation, Ceramic coatings, Graphite, Surface, Structure
Abstract.
It is reported that coatings obtained by PEO on metals were usually surface porous structure.
This special structure reveals the vantages of the coating.
The porous and course surface is just a worm structure, which is beneficial to reduce wear.
Russian Journal of Applied Chemistry 2010;83:664-670 [10] Matykina E, Berkani A, Skeldon P, Thompson, GE.
It is reported that coatings obtained by PEO on metals were usually surface porous structure.
This special structure reveals the vantages of the coating.
The porous and course surface is just a worm structure, which is beneficial to reduce wear.
Russian Journal of Applied Chemistry 2010;83:664-670 [10] Matykina E, Berkani A, Skeldon P, Thompson, GE.
Online since: January 2010
Authors: Takashi Maeshima, Hideaki Matsuoka
After aging,
Al3(Zr1-xTix) precipitates with a metastable L12 structure formed within solute-enriched dendrites.
It is known that ordered structure, L12 type Al3Zr precipitates contribute to these properties [1].
The determination of composition and the observation of the precipitate inner structure are of great difficulty.
It is clear that coherent precipitates form so that there is a definite relationship between the structures of the precipitate and matrix.
Chen: Materials Chemistry and Physics Vol. 73 (2002), p. 111 [8] B.
It is known that ordered structure, L12 type Al3Zr precipitates contribute to these properties [1].
The determination of composition and the observation of the precipitate inner structure are of great difficulty.
It is clear that coherent precipitates form so that there is a definite relationship between the structures of the precipitate and matrix.
Chen: Materials Chemistry and Physics Vol. 73 (2002), p. 111 [8] B.