Highly Crystalline Mesoporous TiO₂(B) Nanofibers

Abstract

Efforts are being made to improve crystalline properties of the skeletons of mesoporous TiO 2 . On the basis of the unique crystal structures and versatile phase evolution of K 2 Ti 2 O 5 , we obtain mesoporous TiO 2 (B) nanofibers (M-NFs) with highly crystalline and high-energy facets exposed skeletons via a cheap and scalable route. Verified by X-ray diffraction, scanning electron microscopy, highresolution transmission electron microscopy, and N 2 adsorption, these special structures come from layered structure of K 2 Ti 2 O 5 and subsequent interlayer splitting and exfoliating and intralayer topotactic transformation. Because of their well-organized frameworks and high surface area, M-NFs exhibit efficient photogenerated charge transportation and hydrogen production, showing better charge mobility along one-dimensional and highly crystalline skeletons than irregularly shaped polycrystalline counterpart and more accessible reactive sites due to larger surface area than single crystal nonporous counterpart.

Porous Single‐Crystal‐Based Inorganic Semiconductor Photocatalysts for Energy Production and Environmental Remediation: Preparation, Modification, and Applications

“…In a different approach, TiO 2 PSC nanofibers were prepared from K 2 Ti 2 O 9 precursor by hydration, cation exchange in the presence of HCl, and final calcination at 500 °C in air for 2 h 154. The H 2 evolution was evaluated in H 2 O:MeOH mixtures (90:10, v:v) in the presence of 0.5 wt% Pt NPs upon 300 W high‐pressure Hg lamp irradiation.…”

PET governed fluorescence “Turn ON” BODIPY probe for selective detection of picric acid

“…Metal-organic framework [18][19][20][21][22] and organic or inorganic conjugated polymers 23,24 , are mostly employed as fluorescent sensors for the detection of poly nitro aromatics particularly picric acid. In the field of NACs detection application of metal organic framework, quantum dots mostly contain cadmium and pyrene class of sensors are challenged by their toxicity 18 43 , self-assembled nanoscopic organic cage for PA detection 44 are some strategies focusing on NACs explosive detection.…”

TiO2 nanofibers heterogeneously wrapped with reduced graphene oxide as efficient Pt electrocatalyst supports for methanol oxidation

“…A heterogeneously wrapped hybrid is necessary to overcome these limitations. In addition, to enlarge the surface area, TiO 2 supports can be designed to have mesoporous structures and nanofiber morphologies [44]. In this work, hydrophilic anatase TiO 2 nanofibers were heterogeneously wrapped with rGO through an in situ hydrothermal method.…”