Covalently bonded 2D/2D O-g-C3N4/TiO2 heterojunction for enhanced visible-light photocatalytic hydrogen evolution

Zhong, Renbin; Zhang, Zisheng; Yi, Huqiang; Zeng, Lei; Tang, Chao; Huang, Limin; Gu, Meng

doi:10.1016/j.apcatb.2017.12.066

Cited by 140 publications

(58 citation statements)

References 51 publications

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“…As shown in Figure 22, the ordered mesoporous black TiO 2 material exhibits a high solar-driven hydrogen production rate (136.2 µmol h −1 ), which is almost twice as high as that of pristine mesoporous TiO 2 (76.6 µmol h −1 ). Zhong et al constructed a covalently bonded oxidized graphitic C 3 N 4 /TiO 2 heterostructure that markedly increased the visible light photocatalytic activity for H 2 evolution by nearly a factor of approximately 6.1 compared to a simple physical mixture of TiO 2 nanosheets and O-g-C 3 N 4 [134].…”

Section: Photocatalytic Hydrogen Generationmentioning

confidence: 99%

Titanium Dioxide: From Engineering to Applications

et al. 2019

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Titanium dioxide (TiO2) nanomaterials have garnered extensive scientific interest since 1972 and have been widely used in many areas, such as sustainable energy generation and the removal of environmental pollutants. Although TiO2 possesses the desired performance in utilizing ultraviolet light, its overall solar activity is still very limited because of a wide bandgap (3.0–3.2 eV) that cannot make use of visible light or light of longer wavelength. This phenomenon is a deficiency for TiO2 with respect to its potential application in visible light photocatalysis and photoelectrochemical devices, as well as photovoltaics and sensors. The high overpotential, sluggish migration, and rapid recombination of photogenerated electron/hole pairs are crucial factors that restrict further application of TiO2. Recently, a broad range of research efforts has been devoted to enhancing the optical and electrical properties of TiO2, resulting in improved photocatalytic activity. This review mainly outlines state-of-the-art modification strategies in optimizing the photocatalytic performance of TiO2, including the introduction of intrinsic defects and foreign species into the TiO2 lattice, morphology and crystal facet control, and the development of unique mesocrystal structures. The band structures, electronic properties, and chemical features of the modified TiO2 nanomaterials are clarified in detail along with details regarding their photocatalytic performance and various applications.

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Section: Photocatalytic Hydrogen Generationmentioning

confidence: 99%

Titanium Dioxide: From Engineering to Applications

et al. 2019

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“…[82] In this sense, the S-scheme system is composed of two n-type photocatalytic semiconductors representing an oxidation and a reduction photocatalyst. [83] TiO2 has been widely reported in the formation of heterojunction systems with other semiconductors for the degradation of organic pollutants, hydrogen production from water splitting and for CO2 photoreduction [84,85,86]. [83] TiO2 has been widely reported in the formation of heterojunction systems with other semiconductors for the degradation of organic pollutants, hydrogen production from water splitting and for CO2 photoreduction [84,85,86].…”

Section: Tio2 Heterojunction Systems With Other Semiconductorsmentioning

confidence: 99%

An approach to the photocatalytic mechanism in the TiO2-nanomaterials microorganism interface for the control of infectious processes

Rodríguez-González

Obregón

Patrón-Soberano

et al. 2020

Applied Catalysis B: Environmental

139

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J o u r n a l P r e -p r o o f 2 Graphical Abstract Highlights  Photoactive TiO2 nanomaterials can solve the actual microbial infectious defies  The microbial cell/TiO2 surface approach is key to get the photo-kill mechanism  Microbial preparation requires a reproducible protocol for proper characterization  Advanced surface characterization techniques can unravel the photo-kill mechanism  Generation of ROS, physical injuries and biocidal features confirm the annihilation J o u r n a l P r e -p r o o f Abstract The approach of this timely review considers the current literature that is focused on the interface nanostructure/cell-wall microorganism to understand the annihilation mechanism. Morphological studies use optical and electronic microscopes to determine the physical damage on the cell-wall and the possible cell lysis that confirms the viability and microorganism death. The key parameters of the tailoring the surface of the photoactive nanostructures such as the metal functionalization with bacteriostatic properties, hydrophilicity, textural porosity, morphology and the formation of heterojunction systems, can achieve the effective eradication of the microorganisms under natural conditions, ranging from practical to applications in environment, agriculture, and so on. However, to our knowledge, a comprehensive review of the microorganism/nanomaterial interface approach has rarely been conducted. The final remarks point the ideal photocatalytic way for the effective prevention/eradication of microorganisms, considering the resistance that the microorganism could develop without the appropriate regulatory aspects for human and ecosystem safety. Introduction and background 1. TiO 2 based materials obtained from TiO 2 and its composites J o u r n a l P r e -p r o o f previous studies have demonstrated that photocatalysis can be considered a promising tool in anticancer therapies, since the photocatalyst can kill cancer cells such as HeLa cells, which cause cervical cancer [7]. The energy absorbed by the photocatalyst comprises the range of ultraviolet and/or visible light, even natural sunlight. When the photocatalyst absorbs light, if the energy of the photons is enough to excite the electrons J o u r n a l P r e -p r o o f 6in the valence band (VB), then they migrate to a higher energy level in the conduction band (CB) of the material, as it is illustrated in Fig. 1. This phenomenon generates the charge carriers known as hole-electron pairs. The photogenerated hole can migrate to the surface of the material and react with water molecules or hydroxyl ions to produce hydroxyl radicals, while the photoexcited electron in the conduction band can react with the adsorbed molecular oxygen to produce superoxide ions [8]. Since the report of Fujishima and Honda about the water splitting process using a TiO2 electrode under UV irradiation, numerous studies have exploited the photoactive properties of this material [9,10]. Several reviews have studied the relationship between the electronic properties of TiO2 with...

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“…Due to the unique, ultrathin 2D face-to-face contact features, the photoinduced charge carriers would travel a very short distance between g-C 3 N 4 and TiO 2 , resulting in a high photocatalytic hydrogen evolution rate of 18,200 μmol g −1 h −1 . Later, Zhong and coworkers [142] prepared a 2D/2D O-g-C 3 N 4 /TiO 2 composite with Type-II configuration for visible-light-driven photocatalytic hydrogen evolution. Some perovskite-type 2D semiconductors with a hexagonal crystal structure can also be coupled with 2D g-C 3 N 4 to form a 2D/2D Type-II photocatalyst for photocatalytic hydrogen evolution.…”

Section: Hydrogen Generationmentioning

confidence: 99%

2D/2D heterostructured photocatalyst: Rational design for energy and environmental applications

2020

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Two-dimensional/two-dimensional (2D/2D) hybrid nanomaterials have triggered extensive research in the photocatalytic field. The construction of emerging 2D/2D heterostructures can generate many intriguing advantages in exploring high-performance photocatalysts, mainly including preferable dimensionality design allowing large contact interface area, integrated merits of each 2D component and rapid charge separation by the heterojunction effect. Herein, we provide a comprehensive review of the recent progress on the fundamental aspects, general synthesis strategies (in situ growth and ex situ assembly) of 2D/2D heterostructured photocatalysts and highlight their applications in the fields of hydrogen evolution, CO 2 reduction and removal of pollutants. Furthermore, the perspectives on the remaining challenges and future opportunities regarding the development of 2D/2D heterostructure photocatalysts are also presented.

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Covalently bonded 2D/2D O-g-C3N4/TiO2 heterojunction for enhanced visible-light photocatalytic hydrogen evolution

Cited by 140 publications

References 51 publications

Titanium Dioxide: From Engineering to Applications

Titanium Dioxide: From Engineering to Applications

An approach to the photocatalytic mechanism in the TiO2-nanomaterials microorganism interface for the control of infectious processes

2D/2D heterostructured photocatalyst: Rational design for energy and environmental applications

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