Green and facile synthesis of graphene nanosheets/K3PW12O40 nanocomposites with enhanced photocatalytic activities

A new ZnO/rGO/polyaniline ternary nanocomposite as photocatalyst with improved photocatalytic activity

“…Both bands position and the bands intensity are highly susceptible for structure changes in the carbon matrix. It is known that the intensity ratio of D and G band (I D /I G ) is used to evaluate the ordered and disordered crystal structures of carbon [27]. …”

“…(1) rGO owns higher specific surface area, offering more active sites for photocatalysis [28,29]; (2) rGO as electron acceptor could attract electron stemming from ZnO stimulated by ultraviolet light, efficiently preventing the recombination of electron-hole pairs [25,27]; (3) rGO provides a favorable absorption property of dye through π-π conjugation between the dye and aromatic regions of rGO [26]; (4) with the increase of rGO content, light harvesting competition between ZnO and rGO is intensified, which leads to the decrease of the photocatalytic performance [61,62]; and (5) the excessive rGO can act as a kind of charge carrier recombination center and promote the recombination of electron-hole pairs in rGO [63,64].…”

“…Until now, graphene has been one of the most intensively studied nanomaterials which can be utilized for various potential applications in the catalytic activities, solar cells, hydrogen storage, batteries and sensors [20][21][22][23][24]. Moreover, graphene has been considered as an ideal material to enhance the photocatalytic efficiency and stability by means of coupling with the photocatalysts, because of its ability to accept the electrons to prevent the recombination, a favorable absorption property of dye through π-π conjugation between the dye and aromatic regions of rGO, pristine mechanical performance to stabilize the catalysis, and the two-dimensional plane to deposit catalyst [25][26][27][28][29]. Zhou et al prepared ZnO-reduced graphene oxide hybrid, showing 87% photodegradation efficiency for methylene blue within 130 min under UV light irradiation [27].…”

“…Moreover, graphene has been considered as an ideal material to enhance the photocatalytic efficiency and stability by means of coupling with the photocatalysts, because of its ability to accept the electrons to prevent the recombination, a favorable absorption property of dye through π-π conjugation between the dye and aromatic regions of rGO, pristine mechanical performance to stabilize the catalysis, and the two-dimensional plane to deposit catalyst [25][26][27][28][29]. Zhou et al prepared ZnO-reduced graphene oxide hybrid, showing 87% photodegradation efficiency for methylene blue within 130 min under UV light irradiation [27]. Meanwhile, ternary composite photocatalyst proves to be an ideal system to further promote the photocatalytic efficiency [30,31].…”

Abrasion properties of self-suspended hairy titanium dioxide nanomaterials

“…Selfsuspended hairy nanomaterials offer attractive possibilities for particular applications, e.g., transportation, microelectromechanical systems (MEMS), liquid electrolytes and magnetic fluid. For the lubricating materials, silicabased nanomaterials with liquid-like behavior used as thickeners in traditional lubricating oils created lubricants whose friction coefficients were lower than that of the base oil, as demonstrated by Yang et al (2016b) and Kim and Archer (2011). More importantly, wear resistance also was reduced due to the localization of silica in the wear tracks of the contact surface.…”