Catalytic performance of carbon nanotubes in H2O2 decomposition: Experimental and quantum chemical study

Abstract

The catalytic performance of multi-walled carbon nanotubes (MWCNTs) with different surface chemistry was studied in the decomposition reaction of H 2 O 2 at various values of pH and temperature. A comparative analysis of experimental and quantum chemical calculation results is given. It has been shown that both the lowest calculated activation energy (~18.9 kJ/mol) and the highest rate cons tant correspond to the N-containing CNT. The calculated chemisorption energy values correlate with the operation stability of MWCNTs. Based on the proposed quantum chemical model it was found that the catalytic activity of carbon materials in electron tran sfer reactions is controlled by their electron donor capability.

Thermal sensitivity of carbon nanotube and graphene oxide containing responsive hydrogels

“…The outstanding mechanical and conductive properties of carbon nanoparticles (CNPs), together with their unique structure and low density, place them among the most common fillers. Carbon nanofiber and carbon nanotubes (CNT) [14][15][16][17][18][19][20] 1,2 , N. Miklósi 1 and its derivatives [21][22][23][24], mainly graphene oxide (GO), have attracted marked interest in the last few years. In biomedical applications, however, the uncertainty surrounding the toxicity of CNTs [14] could affect choices of nanocarbon filler.…”

Microwave purification of multi-wall carbon nanotubes in gas phase

“…For example, Ivar Kruusenberg et al and Voitko et al soaked CNTs in concentrated acid to remove impurities [11,12]. MacKenzie et al add microwave heating in acid pickling process to improve purification result [13,14].…”

“…ACCEPTED MANUSCRIPT 12 G band properties of different MWNTs are disclosed in Table 1. Red shift means that the characteristic spectrum line moves to the infrared end of the spectrum, the wavelength increases and the frequency decreases [20].…”

The interactions of UV and/or H2O2 treated CNTOH and CNTCOOH with environmental fulvic acids

“…The superior hydrophobicity, high specific surface area, and hollow and layered structure of carbon nanotubes (CNT) (Upadhyayula et al, 2009) confirm their growing application in sorption studies (Yu et al, 2014) or catalysis (Voitko et al, 2015). Increased CNT consumption will result in their enlarged disposal into the environment (Dale et al, 2015;Gottschalk et al, 2009;Yu et al, 2014).…”