Fabrication and characterization of ZnO-coated multi-walled carbon nanotubes with enhanced photocatalytic activity

Jiang, Linqin; Gao, Lian

doi:10.1016/j.matchemphys.2004.11.028

Cited by 160 publications

(40 citation statements)

References 14 publications

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“…However, PECVD process has obtained an appropriate attention due to its ability to synthesize vertically aligned CNT arrays at a predetermined position. In recent years, many groups have reported the coating of ZnO nano particles on the CNTs in order to improve the optical and field emission properties of CNTs [18][19][20]. Green et al [18] have reported the coating of a thin layer ZnO on CNTs using atomic layer deposition with diethyl zinc and H 2 O as precursors.…”

Section: Introductionmentioning

confidence: 99%

“…Green et al [18] have reported the coating of a thin layer ZnO on CNTs using atomic layer deposition with diethyl zinc and H 2 O as precursors. Gao and co-workers [20] have reported that CNTs coated with ZnO nanoparticles are obtained from the reaction of zinc acetate and lithium hydroxide monohydrate in hydrous ethanol. In these coating processes, the average size of ZnO particles and interparticle distance can be controlled, resulting in a change in the surface electronic properties of hybrid ZnO-CNTs materials.…”

Section: Introductionmentioning

confidence: 99%

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RETRACTED ARTICLE: Morphological and Field Emission Properties of ZnO Deposited MWCNT by RF Sputtering and PECVD

Farazmand

Fehli

Elahi

et al. 2015

J Inorg Organomet Polym

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We have reviewed the synthesis of nanocomposite zinc oxide deposited carbon nanotube with two different methods. Initially the multi-walled carbon nanotubes (MWCNT) were prepared by the plasma enhanced chemical vapour deposition technique. Then By two different methods ZnO layers were coated on the tubes. RF sputtering was one of the ways to directly deposit ZnO thin layer on the MWCNTs. On the other hand, we used the thermally physical vapour deposition for making thin Zn film to oxidize it later. Scanning electron microscopy and also Raman spectroscopy measurements of the prepared samples confirmed the presence of ZnO nanolayers on the CNT bodies. By the field emission microscopy measurements we found that ZnO deposited CNTs have a more efficient emissivity than that of CNTs alone.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

RETRACTED ARTICLE: Morphological and Field Emission Properties of ZnO Deposited MWCNT by RF Sputtering and PECVD

Farazmand

Fehli

Elahi

et al. 2015

J Inorg Organomet Polym

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“…The peaks at 2h = 26°and 44°are attributed to the graphite structure of MWCNTs [9,11,20]. Between zinc oxide's peaks, the three most intense peaks are related to (100), (002) and (101) crystal plates as observed elsewhere [13,21]. The peak intensities of the CNT and ZnO are different in various samples depended to the concentration ratio of carbon nanotubes and zinc oxide.…”

Section: Results and Discussion X-ray Diffraction (Xrd)mentioning

confidence: 88%

“…Zink oxide is a semiconductor material with an energy gap of 3.37 eV and a large exciton binding energy (60 meV) at room temperature [16][17][18][19]. ZnO has remarkable physical and chemical properties including nontoxic nature, low cost, high optical activity and stability, high sensitivity of UV-Vis light and high thermal and mechanical stability at room temperature [12,13,16,17,20,21]. These properties revealed that the ZnO is a useful material in electronics, optics, photonics, room temperature UV lasers, light emitting diodes and sensors [10-13, 20, 22].…”

Section: Introductionmentioning

confidence: 99%

The effect of concentration ratio and type of functional group on synthesis of CNT–ZnO hybrid nanomaterial by an in situ sol–gel process

Largani

Pasha

2016

Int Nano Lett

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In this research, MWCNT-ZnO hybrid nanomaterials were synthesized by a simple sol-gel process using Zn(CH 3 COO) 2 Á2H 2 O and functionalized MWCNT with carboxyl(COOH) and hydroxyl(OH) groups. Three different mass ratios of MWCNT:ZnO = 3:1, 1:1 and 1:3 were examined. The prepared nanomaterials were characterized by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX) and Fourier transform infrared spectroscopy (FTIR). Successful growth of MWCNT-ZnO hybrids for both COOH and OH functional groups and all the three mass ratios were obtained. The ZnO nanoparticles attached on the surfaces of CNTs have rather spherical shapes and hexagonal crystal structure. By increasing the concentration of ZnO, the number and average size of ZnO nanoparticles decorated the body of CNTs in hybrid structures increase. By increasing the ZnO precursor, the distribution of ZnO nanoparticles that appeared on the surface of CNTs becomes more uniform. The SEM observation beside EDX analysis revealed that at the same concentration ratio the amount of ZnO loading on the surface of MWCNT-COOH is more than MWCNT-OH. Moreover, the average size of ZnO nanoparticles attached on the surface of COOH functionalized CNTs is relatively smaller than that of OH functionalized ones.

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“…Currently, there has been widespread interest in the fabrication of one-dimensional nanoscale materials by coating CNTs with various kinds of materials including metals, non-metals, carbides and oxides [4]. Recently, the attachment of various metal oxides onto the CNT substrate, including SiO 2 , SnO 2 , Fe 3 O 4 , TiO 2 , ZnO and Al 2 O 3 , has been reported [5][6][7][8][9][10]. However, so far, relatively little attention has been paid to perovskite/CNT nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Single-Step Synthesis of LaMnO₃/MWCNT Nanocomposites and Their Photocatalytic Activities

Huang

Sun

et al. 2014

Nanomaterials and Nanotechnology

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Composites of the nano-sized perovskite-type oxide of LaMnO 3 and multi-walled carbon nanotubes (MWCNTs) were synthesized in a single step using the sol-gel method. Their photocatalytic activities for the degradation of various water-soluble dyes under visible light were evaluated. The prepared samples were characterized by thermogravimetry analysis, scanning electron microscopy, transmission electron microscopy, X-ray diffraction, photoluminescence spectroscopy and UV-vis diffused spectroscopy. Results showed that LaMnO 3 nanoparticles grew on the surface of MWCNTs with a grain size of around 20 nm. Photocatalysis measurements revealed that the LaMnO 3 /MWCNT nanocomposites had greater photocatalytic activities than pure LaMnO 3 nanoparticles, and the mass percentage of MWCNTs showed that 9.4% possessed the highest photocatalytic activity. These results indicate that LaMnO 3 /MWCNT nanocomposites are promising candidates as highly effective photocatalysts.

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Fabrication and characterization of ZnO-coated multi-walled carbon nanotubes with enhanced photocatalytic activity

Cited by 160 publications

References 14 publications

RETRACTED ARTICLE: Morphological and Field Emission Properties of ZnO Deposited MWCNT by RF Sputtering and PECVD

RETRACTED ARTICLE: Morphological and Field Emission Properties of ZnO Deposited MWCNT by RF Sputtering and PECVD

The effect of concentration ratio and type of functional group on synthesis of CNT–ZnO hybrid nanomaterial by an in situ sol–gel process

Single-Step Synthesis of LaMnO₃/MWCNT Nanocomposites and Their Photocatalytic Activities

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Fabrication and characterization of ZnO-coated multi-walled carbon nanotubes with enhanced photocatalytic activity

Cited by 160 publications

References 14 publications

RETRACTED ARTICLE: Morphological and Field Emission Properties of ZnO Deposited MWCNT by RF Sputtering and PECVD

RETRACTED ARTICLE: Morphological and Field Emission Properties of ZnO Deposited MWCNT by RF Sputtering and PECVD

The effect of concentration ratio and type of functional group on synthesis of CNT–ZnO hybrid nanomaterial by an in situ sol–gel process

Single-Step Synthesis of LaMnO3/MWCNT Nanocomposites and Their Photocatalytic Activities

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Single-Step Synthesis of LaMnO₃/MWCNT Nanocomposites and Their Photocatalytic Activities