Visible photocatalytic and photoelectrochemical activities of TiO2 nanobelts modified by In2O3 nanoparticles

Yang, Hongru; Tian, Jian; Bo, Yanyan; Zhou, Yanli; Wang, Xinzhen; Cui, Hongzhi

doi:10.1016/j.jcis.2016.10.051

Cited by 66 publications

(19 citation statements)

References 35 publications

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“…The corresponding FESEMs of undoped TONTs are published elsewhere. [23] 3. anatase phase (JCPDS 21-1272 [21,22] ). In addition to the anatase peaks, low intense reflection peaks are observed at %22.4 , 30.9 , and 42.3 in ITONTs.…”

Section: Morphological Analysismentioning

confidence: 99%

“…In addition to the anatase peaks, low intense reflection peaks are observed at %22.4 , 30.9 , and 42.3 in ITONTs. These are identified as reflections from the (211), (222), and (332) planes of In 2 O 3 (JCPDS 71-2194 [22] ), indicating the formation of both In 2 O 3 and TiO 2 phases, with the latter as the dominant phase in ITONTs. The microstrain and crystallite size are determined using the Williamson-Hall plot ( Figure 4a).…”

Section: Morphological Analysismentioning

confidence: 99%

“…Here, the enhancement in photocatalytic efficiency can be ascribed to three important factors: 1) the creation of a p-n junction (type II) that provides an internal electric field that helps in the separation of photoinduced electron-hole pairs; 2) absorption of visible photons by In 2 O 3 nanoparticles as well as by the indium-doped NTs with bandgap successfully reduced to activate visible photon absorption, thus enhancing the production of electron hole pairs; and 3) the creation of more active adsorption sites by the small size of In 2 O 3 nanoparticles and the large surfaceto-volume ratio of the hybrid structure. [21,22] A few other works where such modifications are successfully used to obtain high degradation rates of different pollutants report somewhat laborious preparation methods. Niu et al [41] fabricated TiO 2 NT (TONT)-based heterojunction photocatalyst via the coupling of reduced graphene oxide on fluorine doped tin oxide (FTO) film and obtained a degradation rate of 91.3% under irradiation for 100 min, but their catalyst preparation took 36 h. Lin et al [10] observed almost 95% degradation of Rhodamine B in 120 min with heterostructure of MoS 2 /TiO 2 prepared by hydrothermal method taking more than 2 days for the fabrication.…”

Section: Photocatalytic Studiesmentioning

confidence: 99%

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Fabrication and Characterization of Type‐II Heterostructure n:In₂O₃/p:in‐TiO₂ for Enhanced Photocatalytic Activity

Nair¹,

John²,

Joseph³

et al. 2020

Physica Status Solidi (b)

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The photodegradation rate of anatase TiO 2 is enhanced by about 11 times (from 0.0015 to 0.016 min À1) by construction of a type-II p-n heterostructure of configuration n:In 2 O 3 /p:In-doped TiO 2. A simple and cost-effective two-stage electrochemical anodization is used for the fabrication of this comparatively stable and recyclable photocatalyst of vertically aligned indium-doped TiO 2 nanotubes with an overlayer of n-type In 2 O 3 nanoparticles. The modified structural, morphological, compositional, optical, and electrical properties of the TiO 2 nanotubes are studied in detail by X-ray diffraction, X-ray photoelectron spectroscopy, Rutherford backscattering, field-emission scanning electron microscopy, reflectance measurements, and electrical conductivity measurements. The enhancement in device performance by the heterostructure is attributable to the tuning of optical bandgap to the visible energy region of solar spectrum, the effective electron-hole pair separation at the potential barrier, and the increase in surface-to-volume ratio and effective adsorption area of the photocatalyst by the structural modification with nanoparticles and the nanotube formation.

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Section: Morphological Analysismentioning

confidence: 99%

Section: Morphological Analysismentioning

confidence: 99%

Section: Photocatalytic Studiesmentioning

confidence: 99%

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Fabrication and Characterization of Type‐II Heterostructure n:In₂O₃/p:in‐TiO₂ for Enhanced Photocatalytic Activity

Nair¹,

John²,

Joseph³

et al. 2020

Physica Status Solidi (b)

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“…One is that most of the hydrotalcite‐based catalysts are generally present in the form of powders in the catalytic system, which is difficult to be recycled and reused . The other is that the electron‐hole pairs produced by the catalysts after being stimulated by light are easily recombined, which result in a decrease in its catalytic activity …”

Section: Photoelectrocatalysis Of Hydrotalcite‐derived Materials In Smentioning

confidence: 99%

Research Progress in the Field of Adsorption and Catalytic Degradation of Sewage by Hydrotalcite‐Derived Materials

Pan

Tian

et al. 2019

The Chemical Record

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With the rapid development of industry and agriculture and the greatly improved living conditions, the resultant gradually deteriorated environments threaten the human beings. Refractory or even toxic pollutants, which are from different industries such as printing and dyeing, pesticides, chemicals, petrochemicals, plastics and rubber, seriously threat the ecosystems and human health. Having the advantages of flexible composition, unique structure, high stability, memory effect, easy preparation and low cost, hydrotalcite compounds have a great potential in sewage degradation and environmental protection. This study focuses on the adsorption and catalytic properties (such as photocatalysis, electrocatalysis and photoelectrocatalysis) of hydrotalcite-derived materials for treating organic, inorganic and heavy metal ion sewage. The types of adsorption and catalysis, and the effects of various influencing factors on the degradation efficiency were discussed as well.Wiley Online Library 355 Figure 13. The photoelectrocatalytic mechanism of organic pollutant MB over the ZNI-1-MMO-1.5 V photoelectrode.

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“…The full survey scan of the thermally oxidized TiO 2 layers revealed the presence of the elements Ti, O, and C, as shown in Figure 6d. [50] Ti 2p in the XPS spectrum (Figure 6e) consisted of three peaks located at binding energies of 464.5, 459.8, and 458.4 eV for the 2p 1/2 and 2p 3/2 peaks, respectively, corresponding to Ti 4+ and Ti 3+ in TiO 2 . [50] Ti 2p in the XPS spectrum (Figure 6e) consisted of three peaks located at binding energies of 464.5, 459.8, and 458.4 eV for the 2p 1/2 and 2p 3/2 peaks, respectively, corresponding to Ti 4+ and Ti 3+ in TiO 2 .…”

Section: Wwwadvmattechnoldementioning

confidence: 99%

Performance Enhancement of Graphene Photodetectors via In Situ Preparation of TiO₂ on Graphene Channels

Cheng

Yang

Huang

et al. 2018

Adv Materials Technologies

Self Cite

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modulators, [14,15] and photodetectors. [16][17][18][19][20] The combination of a broadband lightabsorption range (from far-infrared to ultraviolet ranges in theory [21] ) and ultrahigh carrier mobility (1 000 000 cm 2 V −1 s −1 in experiment [22] ) makes graphene a star contender for photodetection applications. [16][17][18][19][20]23] The first reported spatial graphene photodetector (GPD) achieved a bandwidth of ≈40 GHz, and the ultrahigh intrinsic operation speeds could be well over 500 GHz, surpassing state-of-the-art PDs based on other materials. [16] However, the uniform 2.3% optical absorption of graphene limits the photoresponsivity of GPDs to several mA W −1 . [16,17] To enhance the optical absorption of graphene and thus the photoresponsivity of GPDs, microcavities, [24] plasmon resonators, [25] and silicon optical waveguides [18][19][20]26,27] have been utilized, but these structures weaken the broadband characteristic of GPDs. Another method carried out by fabricating a hybrid photodetector consisting of graphene covered by a thin film of colloidal quantum dots greatly improves the photoresponsivity from visible to near-infrared ranges. [28] However, the operation stability of this kind of GPD may not be satisfactory due to the air instability of colloidal quantum dots and the "dirty" interface between graphene and the cover layer. Moreover, colloidal quantum dots cannot be obtained with complementary metal-oxide-semiconductor (CMOS)-compatible fabrication processes, which are critical for low-cost devices. Hence, new methods should be proposed to achieve a CMOS-compatible broadband GPD with high photoresponsivity and high operation stability.TiO 2 nanomaterials have attracted considerable attention for applications in optoelectronic devices, [29] solar cells, [30] and photocatalysts [31] due to their advantages such as nontoxicity, low cost, chemical and thermal stability, and resistance to photocorrosion. [32][33][34] TiO 2 nanomaterials have been widely used as a shielding layer to prevent penetration of water molecules and oxygen gas. [35,36] Thus, thin TiO 2 films with low gas permeabilities can be excellent protection layers for graphene in high-stability GPDs. TiO 2 has three polymorphs: rutile, anatase, and brookite. [37] The metastable anatase form shows better performance in energy-related applications and optoelectronics because its formation temperature is relatively low and numerous intrinsic point defects exist in incomplete lattices. [38] Photodetectors Graphene, a single sheet of carbon atoms in a hexagonal lattice, [1] has captured extensive research interest due to its excellent mechanical, [2] thermal, [3] electronic, [1,4] and optical properties. [5,6] Due to its unique band structure, graphene shows ultrahigh carrier mobility, tunable transport polarity, and tunable broadband absorption, which make graphene a very promising candidate for use in electronic, photonic, and optoelectronic applications, such as transistors, [7] frequency multipliers, [8,9] frequency mixers, [10][11][1...

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Visible photocatalytic and photoelectrochemical activities of TiO2 nanobelts modified by In2O3 nanoparticles

Cited by 66 publications

References 35 publications

Fabrication and Characterization of Type‐II Heterostructure n:In₂O₃/p:in‐TiO₂ for Enhanced Photocatalytic Activity

Fabrication and Characterization of Type‐II Heterostructure n:In₂O₃/p:in‐TiO₂ for Enhanced Photocatalytic Activity

Research Progress in the Field of Adsorption and Catalytic Degradation of Sewage by Hydrotalcite‐Derived Materials

Performance Enhancement of Graphene Photodetectors via In Situ Preparation of TiO₂ on Graphene Channels

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Visible photocatalytic and photoelectrochemical activities of TiO2 nanobelts modified by In2O3 nanoparticles

Cited by 66 publications

References 35 publications

Fabrication and Characterization of Type‐II Heterostructure n:In2O3/p:in‐TiO2 for Enhanced Photocatalytic Activity

Fabrication and Characterization of Type‐II Heterostructure n:In2O3/p:in‐TiO2 for Enhanced Photocatalytic Activity

Research Progress in the Field of Adsorption and Catalytic Degradation of Sewage by Hydrotalcite‐Derived Materials

Performance Enhancement of Graphene Photodetectors via In Situ Preparation of TiO2 on Graphene Channels

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Fabrication and Characterization of Type‐II Heterostructure n:In₂O₃/p:in‐TiO₂ for Enhanced Photocatalytic Activity

Fabrication and Characterization of Type‐II Heterostructure n:In₂O₃/p:in‐TiO₂ for Enhanced Photocatalytic Activity

Performance Enhancement of Graphene Photodetectors via In Situ Preparation of TiO₂ on Graphene Channels