Atomic layer deposition derived amorphous TiO2 thin film decorating graphene nanosheets with superior rate capability

Li, Minsi; Li, Xifei; Li, Weihan; Meng, Xiangbo; Yu, Yan; Sun, Xueliang

doi:10.1016/j.elecom.2015.05.005

Cited by 61 publications

(22 citation statements)

References 30 publications

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“…This means that the oxide layers grown at 250 °C are crystalline (anatase), while the ones deposited at 80 °C are amorphous [42]. Examples of amorphous TiO2 deposited by low temperature ALD can be found in the literature [28,[43][44][45].…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic properties of TiO2@polymer and TiO2@carbon aerogel composites prepared by atomic layer deposition

Justh

Mikula

Bakoš

et al. 2019

Carbon

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Monolithic structured TiO2/aerogel composites were prepared from resorcinol-formaldehyde polymer aerogel (RFA) and its carbon aerogel (RFCA) derivative. A resorcinol-formaldehyde hydrogel was synthesized in a sol-gel reaction and transformed into polymer aerogel by supercritical drying. The RFA was converted to carbon aerogel by pyrolysis at 900 °C in dry N2.Amorphous and crystalline TiO2 layers were grown from TiCl4 and H2O precursors by atomic layer deposition (ALD) at 80 °C and 250 °C, respectively, on both RFA and RFCA. The substrates and the composites were studied by N2 adsorption, TG/DTA-MS, Raman, SEM-EDX and TEM techniques. Their photocatalytic activity was compared in the UV catalyzed decomposition reaction of methyl orange dye. Keywordsresorcinol-formaldehyde polymer aerogel, carbon aerogel, photocatalysis, ALD, TiO2 IntroductionBeside crystalline carbonaceous nanomaterials such as fullerene, graphene, graphene oxide, nanodiamond, carbon nanospheres, carbon nanotubes; mesoporous carbon aerogels have attracted a great deal of attention. Carbon aerogels, available also in monolithic form, have several favorable properties, for example they can be used as adsorbents or as substrates for catalysts, because of their robustness and high specific surface area [1,2]. They are also excellent thermal and phonic insulators, while conduct electricity. These properties can be tuned through their synthesis conditions. [3][4][5][6][7] Resorcinol-formaldehyde (RF) organic aerogels, that Pekala and co-workers synthetized for the first time [8], undergo two main stages during preparation. In the first stage a hydrogel is prepared by a sol-gel process and in the second stage after drying the aerogel is obtained. The resorcinol-formaldehyde polymer aerogel becomes a carbon aerogel in a consecutive third stage, which is carbonization occasionally followed by activation. Depending on the conditions carbonization or activation influence the structural and performance characteristics, like the specific surface area, significantly [9][10][11][12].Photocatalytic carbon nanocomposites have great potential in the field of environmental remediation, water splitting and self-cleaning surfaces [13,14]. Among the various semiconductor oxide photocatalysts TiO2 is researched widely, due to being stable and nontoxic. TiO2 has ideal band gap width for the half reactions of water splitting and its composites with other nanomaterials, such as carbon nanostructures, may enhance the photocatalytic activity. However, its use still faces some difficulties, such as a narrow light response range limited to UV. The carbon nanostructure inhibits the recombination by promoting the charge separation as an electron acceptor. This effect and the widening of the wavelength response range through Ti-O-C bonds as well as modifying the photocatalytic selectivity are three advantages of TiO2 composites [3,[15][16][17][18]. Moreover, a number of studies indicates that nanoporous or nanostructured carbon materials, such as activated carbon or graphene-oxide...

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Section: Resultsmentioning

confidence: 99%

Photocatalytic properties of TiO2@polymer and TiO2@carbon aerogel composites prepared by atomic layer deposition

Justh

Mikula

Bakoš

et al. 2019

Carbon

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“…Anodes synthesized via the ALD mainly focus upon the transition metal oxides (TMOs) including RuO 2 [ 67 ], SnO 2 [ 68 , 69 , 70 , 72 , 73 , 74 ], TiO 2 [ 75 , 76 , 77 , 78 , 79 , 80 , 102 ], and ZnO [ 81 ]. Although these potential anode materials can yield high theoretical capacities (~781 mAh·g −1 , corresponding to ~5400 Ah·L −1 , greatly exceeding ~837 Ah·L −1 for the graphite), it is still confronted with many critical issues.…”

Section: Construction Of Electrode Materials and Sses Via The Ald mentioning

confidence: 99%

Recent Progresses and Development of Advanced Atomic Layer Deposition towards High-Performance Li-Ion Batteries

Liang

Sun

et al. 2017

Nanomaterials

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Electrode materials and electrolytes play a vital role in device-level performance of rechargeable Li-ion batteries (LIBs). However, electrode structure/component degeneration and electrode-electrolyte sur-/interface evolution are identified as the most crucial obstacles in practical applications. Thanks to its congenital advantages, atomic layer deposition (ALD) methodology has attracted enormous attention in advanced LIBs. This review mainly focuses upon the up-to-date progress and development of the ALD in high-performance LIBs. The significant roles of the ALD in rational design and fabrication of multi-dimensional nanostructured electrode materials, and finely tailoring electrode-electrolyte sur-/interfaces are comprehensively highlighted. Furthermore, we clearly envision that this contribution will motivate more extensive and insightful studies in the ALD to considerably improve Li-storage behaviors. Future trends and prospects to further develop advanced ALD nanotechnology in next-generation LIBs were also presented.

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“…It suggested that the metallic cobalt was formed during the growth of CNTs, where the cobalt salt was reduced to metallic cobalt, as well as acting as a catalyst [17]. For the GCM 20 nanocomposites, one typical peaks (2θ ¼ 26.81) originating from the GC can be found [18]. Furthermore, all the well-defined diffraction peaks are correspond to monoclinic potassium birnessite (JCPDS no.…”

Section: Resultsmentioning

confidence: 94%

MnO2 grown in situ on graphene@CNTs as electrode materials for supercapacitors

Chen

Huang

Zhang

et al. 2015

Ceramics International

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Atomic layer deposition derived amorphous TiO2 thin film decorating graphene nanosheets with superior rate capability

Cited by 61 publications

References 30 publications

Photocatalytic properties of TiO2@polymer and TiO2@carbon aerogel composites prepared by atomic layer deposition

Photocatalytic properties of TiO2@polymer and TiO2@carbon aerogel composites prepared by atomic layer deposition

Recent Progresses and Development of Advanced Atomic Layer Deposition towards High-Performance Li-Ion Batteries

MnO2 grown in situ on graphene@CNTs as electrode materials for supercapacitors

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