Facile fabrication of transparent, broadband photoresponse, self-cleaning multifunctional graphene–TiO2 hybrid films

Zhu, Jianping; Cao, Yang; He, Junhui

doi:10.1016/j.jcis.2014.01.015

Cited by 39 publications

(30 citation statements)

References 55 publications

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“…The other peak at 45.4 • is due to 211 anatase plane and appears when the film is deposited from the solution with TS:GD of 1:4 and annealed at 150 • C [18]. The reflection peak at 56.6 • is assigned to 211 anatase and 105 rutile planes [3,13,15]. These signals are weak in the composite films with low TiO 2 content, but are quite strong in the TiO 2 -rich film annealed at 150 • C. Another signature of TiO 2 , 200 anatase plane at 48 • only appears in the rich-TiO 2 film annealed at 150 • C. Therefore, a TiO 2 -rich composite film annealed at 150 • C shows ideal transformation of titanium precursors to crystalline TiO 2 .…”

Section: Resultsmentioning

confidence: 99%

“…Carbon-based materials may be combined with TiO 2 , to alleviate the fast recombination of the excited electron-hole pairs and to serve as supporting matrix for TiO 2 [8,[11][12][13]. Compared to 3D carbon materials, graphene nanosheets with 2D structure are a better alternative, in that the incorporation and entrapment of TiO 2 nanoparticles into 2D graphene nanosheets is readily achieved.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, graphene-TiO 2 hybrid compound, in the form of powders or thin films, enables an extended light harvesting capability, owing to Ti-O-C bonding. Also, graphene-TiO 2 interfaces provide effective charge transfer junctions, which help the injection of electrons from TiO 2 to graphene sheets leading to prolonged recombination [7,[13][14][15][16]. Beside coordination with inorganic materials, graphene provides a strong chemical affinity with organic materials, in particular with the organic dyes [17].…”

Section: Introductionmentioning

confidence: 99%

“…To alleviate this complication, several strategies have been suggested, such as using TiO 2 nanowires instead of nanoparticles [7], and using layer-by-layer assembly of TiO 2 and graphene nanosheets [13]. In a study conducted by Cheng et al [14], graphene-TiO 2 composite was synthesized by solvothermal reaction, using various graphene to TiO 2 ratios.…”

Section: Introductionmentioning

confidence: 99%

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Photocatalytic Graphene-TiO2 Thin Films Fabricated by Low-Temperature Ultrasonic Vibration-Assisted Spin and Spray Coating in a Sol-Gel Process

2017

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Abstract:In this work, we communicate a facile and low temperature synthesis process for the fabrication of graphene-TiO 2 photocatalytic composite thin films. A sol-gel chemical route is used to synthesize TiO 2 from the precursor solutions and spin and spray coating are used to deposit the films. Excitation of the wet films during the casting process by ultrasonic vibration favorably influences both the sol-gel route and the deposition process, through the following mechanisms. The ultrasound energy imparted to the wet film breaks down the physical bonds of the gel phase. As a result, only a low-temperature post annealing process is required to eliminate the residues to complete the conversion of precursors to TiO 2 . In addition, ultrasonic vibration creates a nanoscale agitating motion or microstreaming in the liquid film that facilitates mixing of TiO 2 and graphene nanosheets. The films made based on the above-mentioned ultrasonic vibration-assisted method and annealed at 150 • C contain both rutile and anatase phases of TiO 2 , which is the most favorable configuration for photocatalytic applications. The photoinduced and photocatalytic experiments demonstrate effective photocurrent generation and elimination of pollutants by graphene-TiO 2 composite thin films fabricated via scalable spray coating and mild temperature processing, the results of which are comparable with those made using lab-scale and energy-intensive processes.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Photocatalytic Graphene-TiO2 Thin Films Fabricated by Low-Temperature Ultrasonic Vibration-Assisted Spin and Spray Coating in a Sol-Gel Process

2017

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“…Katsanaki et al, 2013;amphiphilic property Pelaez et al, 2012) The visible light absorption of TiO 2 and photocatalytic oxidation of volatile compounds increased when in the presence of Cu (II). In the absence of light, Cu (I) had antimicrobial properties (Fateh et al, 2014 (Karimi et al, 2014a;Zhu et al, 2014;Yao and He, 2014;Xu et al, 2013a). The fabricated surface with TiO 2 followed by Ag nanoparticles showed a high antibacterial potential against E. coli (Kapridaki et al, 2014).…”

Section: Antibacterial Activitiesmentioning

confidence: 99%

Recent Progress in Self-Cleaning Materials with Different Suitable Applications

Chermahini¹,

Ostad‐Ali‐Askari²,

Eslamian³

et al. 2018

American Journal of Engineering and Applied Sciences

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Self-cleaning properties have received significant attention for the importance of their potential. Coatings at Nano-scales offer possibilities of using materials for self-cleaning surfaces. Recent efforts have begun to focus on the kinds of materials including metals, semiconductors and polymers. Such materials can have enormous potential in only a few applications. Moreover, the production of these materials requires high costs with low photo activity. In this regard, TiO 2 and its derived materials have shown acceptable and effective suggestions for this application. Moreover, the mechanism of self-cleaning has been explained by the effect of hydrophilic and hydrophobic. Hydrophilic and hydrophobic can have many applications in different areas like water purification, microfluidics and photovoltaic. In this review, the application of self-cleaning in solar cells and environment as well as TiO 2 derived materials and their applications in water management have been briefly illustrated. In addition, it has been explained that a huge number of self-cleaning materials, applications and improvement in utilities have been essential. In short, we have conducted a comprehensive review of the new approach and to mention numerous materials with hydrophobic and hydrophilic properties would be promising for most environmental concerns. Bio-inspired surface respond in nature through hydrophobic (Cicada Wing, Butterfly Wing, Lotus Leaf, Rice Leaf) and hydrophilic (Fish Scale, Snail Shell, Shark Skin) properties was divided in 4 and 3 respectively. Anti reflective coatings with self-cleaning properties have drowned considerable attention for both their basic appearances and vast applied usages. Antireflective coatings with self-cleaning properties have been considered because of their fascinating features and vast diversity of empirical uses.

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Flourishing Bioinspired Antifogging Materials with Superwettability: Progresses and Challenges

et al. 2018

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Antifogging (AF) structure materials found in nature have great potential for enabling novel and emerging products and technologies to facilitate the daily life of human societies, attracting enormous research interests owing to their potential applications in display devices, traffics, agricultural greenhouse, food packaging, solar products, and other fields. The outstanding performance of biological AF surfaces encourages the rapid development and wide application of new AF materials. In fact, AF properties are inextricably associated with their surface superwettability. Generally, the superwettability of AF materials depends on a combination of their surface geometrical structures and surface chemical compositions. To explore their general design principles, recent progresses in the investigation of bioinspired AF materials are summarized herein. Recent developments of the mechanism, fabrication, and applications of bioinspired AF materials with superwettability are also a focus. This includes information on constructing superwetting AF materials based on designing the topographical structure and regulating the surface chemical composition. Finally, the remaining challenges and promising breakthroughs in this field are also briefly discussed.

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Facile fabrication of transparent, broadband photoresponse, self-cleaning multifunctional graphene–TiO2 hybrid films

Cited by 39 publications

References 55 publications

Photocatalytic Graphene-TiO2 Thin Films Fabricated by Low-Temperature Ultrasonic Vibration-Assisted Spin and Spray Coating in a Sol-Gel Process

Photocatalytic Graphene-TiO2 Thin Films Fabricated by Low-Temperature Ultrasonic Vibration-Assisted Spin and Spray Coating in a Sol-Gel Process

Recent Progress in Self-Cleaning Materials with Different Suitable Applications

Flourishing Bioinspired Antifogging Materials with Superwettability: Progresses and Challenges

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