Decorating and Filling of Multi-Walled Carbon Nanotubes with TiO<sub>2</sub> Nanoparticles via Wet Chemical Method

Abstract

Multi-walled carbon nanotubes (MWCNTs) have been successfully modified with TiO 2 nanoparticles via wet chemical method. For this purpose tetra chloride titanium (TiCl 4 ) was used as titanium source. MWCNTs were exposed at different amount of TiCl 4 (0.25 and 0.1 ml) and different soaking times. The modified MWCNTs have been characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). TEM results showed that the MWCNTs were fully decorated with TiO 2 at short term immersion. Increasing soaking time caused to fill the MWCNTs with TiO 2 nanoparticles. The results showed that the amount of precursor had a significant role on quantity of decoration. The decoration of outer surface of MWCNTs with TiO 2 was more noticeable at large amount of TiCl 4 . XRD results revealed that the crystalline structure of TiO 2 on the surface and inner of MWCNTs was rutile. The average size of TiO 2 nanoparticles which modified MWCNTs were 20 nm.

Carbon nanotube supported PtO nanoparticles with hybrid chemical states for efficient hydrogen evolution

“…S5. The sharp peak at 26°a nd the broad peak at 43°are attributed to the characteristic peaks of CNTs [23], while no obvious diffraction peaks related to Pt or PtO 2 can be observed, suggesting the amorphous structure or ultra-small particle size of the NPs [20,24]. The Pt contents in the two samples are probed by inductively coupled plasma optical emission spectrometer (ICP-MS) and the measured values are 2.32 wt% and 2.20 wt% (Table S1) for PtO x /CNT and R-PtO x /CNT, respectively.…”

Experimental investigation of the rheological behavior and viscosity of decorated multi-walled carbon nanotubes with TiO2 nanoparticles/water nanofluids

“…3. The peaks at 27.387°, 36.007°, 41.158°and 54.213°belong to the diffraction peaks of (110), (101), (111) and (211) of rutile, and their broadness suggests the presence of very small crystals [36]. Rheological behavior of TiO 2 nanofluid containing various amounts of nanoparticles is presented in Fig.…”

Improvement of photocatalytic decomposition of methyl orange by modified MWCNTs, prediction of degradation rate using statistical models

“…2. The main characteristic peaks of MWCNTs that is belonged to the (002) and (100) Bragg re ection planes of graphite can be detected at 26.31° and 42.76°, respectively [19,21]. Fig.…”

“…Therefore, the both of crystal structures (anatase and rutile) can be con rmed in the synthesized TiO 2 nanoparticles. The fraction of each crystal structures can be approximately calculated using Equation 1 [19,20]:…”