Control synthesis of rutile TiO2 microspheres, nanoflowers, nanotrees and nanobelts via acid-hydrothermal method and their optical properties

Zhou, Weijia; Liu, Xiaoyan; Cui, Jingjie; Liu, Duo; Li, Jing; Jiang, Huaidong; Wang, Jing; Liu, Hong

doi:10.1039/c1ce05186e

Cited by 134 publications

(107 citation statements)

References 36 publications

(36 reference statements)

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“…These spheres are formed during synthesis, as the nanorods produced initially in solution having the rutile phase, tend to aggregate in spheres in order to reduce the surface energy [60]. Thus, the nanorod spheres observed after microwave synthesis for all conditions studied are believed to have the rutile phase, with the individual TiO 2 nanorods having a [001] growth direction, such as previous related studies [5,63]. The nanorod spheres produced at 80 • C with water presented significant structural differences, and it can be expected that these dissimilarities are related to the nanorod sphere evolution along synthesis.…”

Section: Electron Microscopymentioning

confidence: 99%

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Photocatalytic TiO2 Nanorod Spheres and Arrays Compatible with Flexible Applications

et al. 2017

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Abstract:In the present study, titanium dioxide nanostructures were synthesized through microwave irradiation. In a typical microwave synthesis, nanorod spheres in the powder form were simultaneously produced with nanorod arrays grown on polyethylene terephthalate (PET) substrates. The syntheses were performed in water or ethanol with limited temperature at 80 • C and 200 • C. A simple and low-cost approach was used for the arrays growth, which involved a PET substrate with a zinc oxide seed layer deposited by spin-coating. X-ray diffraction (XRD) and Raman spectroscopy revealed that synthesis in water result in a mixture of brookite and rutile phases, while using ethanol as solvent it was only observed the rutile phase. Scanning electron microscopy (SEM) showed that the synthesized spheres were in the micrometer range appearing as aggregates of fine nanorods. The arrays maintained the sphere nanorod aggregate structures and the synthesis totally covered the flexible substrates. Transmission electron microscopy (TEM) was used to identify the brookite structure. The optical band gaps of all materials have been determined from diffuse reflectance spectroscopy. Photocatalytic activity was assessed from rhodamine B degradation with remarkable degradability performance under ultraviolet (UV) radiation. Reusability experiments were carried out for the best photocatalyst, which also revealed notable photocatalytic activity under solar radiation. The present study is an interesting and competitive alternative for the photocatalysts existing nowadays, as it simultaneously results in highly photoactive powders and flexible materials produced with low-cost synthesis routes such as microwave irradiation.

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Section: Electron Microscopymentioning

confidence: 99%

“…TiO2 nanorod micro-sized spheres have been reported previously [3,34,63]. These spheres are formed during synthesis, as the nanorods produced initially in solution having the rutile phase, tend to aggregate in spheres in order to reduce the surface energy [60].…”

Section: Electron Microscopymentioning

confidence: 99%

Photocatalytic TiO2 Nanorod Spheres and Arrays Compatible with Flexible Applications

et al. 2017

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“…Especially, the design and synthesis of TiO 2 nanomaterials with 3D hierarchical architectures have triggered more and more research in nanoscience and nanotechnology. For example, the hydrochloric acid assisted hydrothermal method has been investigated in an effort to produce 3D hierarchical TiO 2 nanotrees and nanoflowers [19][20][21]. The role of hydrochloric acid in the nanostructures formation is to avoid fast hydrolysis of titanium precursor.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis and enhanced photocatalytic performance of dahlia-like TiO2 structures via an EDA-assisted hydrothermal method

Fan

Meng

et al. 2016

J Mater Sci: Mater Electron

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Novel dahlia-like TiO 2 structures were successfully synthesized by an ethylenediamine (EDA)-assisted hydrothermal method. The EDA served as ligand and facilitated the growth of dahlia-like TiO 2 structures. Particularly, the dahlia-like TiO 2 structures were built by twodimensional (2D) thin nanosheets, which interconnected with each other. In addition, the dahlia-like TiO 2 structures own relatively large specific surface areas of 158.85 m 2 /g. Furthermore, the dahlia-like TiO 2 structures exhibit higher photocatalytic activity than that of commercial P25 for degradation of Rhodamine under UV light irradiation. The enhanced photocatalytic activity is due to the synergetic effect of the architecture and high BET surface area of the photocatalyst.

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“…In addition to the above methods, hydrothermal treat-ment remains a promising method to construct large-scale nanostructures at relative low temperature and low cost [11][12][13]. Hydrothermal treatment has already been used to bioactivate the titanium scaffold surface with functionalized nanostructures [14].…”

Section: Introductionmentioning

confidence: 99%

Large-scale functionalization of biomedical porous titanium scaffolds surface with TiO2 nanostructures

Qian

Zeng

et al. 2017

Sci. China Mater.

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Construction of functional porous titanium scaffold is drawing ever growing attention, due to its effectiveness in solving the mechanical mismatch between titanium implant and bone tissue. However, the poor water permeability as well as the problem in achieving uniform surface modification inside scaffold hinders the further biomedical application of porous titanium scaffold. In this study, largescale functional TiO 2 nanostructures (nanonetwork, nanoplate and nanowire) were constructed on three-dimensional porous titanium scaffolds surface via an effective hydrothermal treatment method. These nanostructures increase the hydrophilicity of the titanium scaffold surface, facilitating the cell culture medium to penetrate into the inner pore of the scaffold. Zeta potential analyses indicate that the surface electrical properties depend on the nanostructure, with nanowire exhibiting the lowest potential at pH 7.4. The influence of the nano-functionalized scaffold on protein adsorption and cell adhesion was examined. The results indicate that the nano-functionalized surface could modulate protein adsorption and bone marrow derived mesenchymal stem cells (BMSCs) adhesion, with the nanowire functionalized porous scaffold homogeneously promoting protein adsorption and BMSCs adhesion. Our research will facilitate future research on the development of novel functional porous scaffold.

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Control synthesis of rutile TiO2 microspheres, nanoflowers, nanotrees and nanobelts via acid-hydrothermal method and their optical properties

Cited by 134 publications

References 36 publications

Photocatalytic TiO2 Nanorod Spheres and Arrays Compatible with Flexible Applications

Photocatalytic TiO2 Nanorod Spheres and Arrays Compatible with Flexible Applications

Facile synthesis and enhanced photocatalytic performance of dahlia-like TiO2 structures via an EDA-assisted hydrothermal method

Large-scale functionalization of biomedical porous titanium scaffolds surface with TiO2 nanostructures

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