Construction of homojunction-adsorption layer on anatase TiO2 to improve photocatalytic mineralization of volatile organic compounds

Design and constructing of mutually independent crystal facet exposed TiO2homojunction and improving synergistic effects for photoelectrochemical hydrogen generation and pollutant degradation

“…21‐1272) 2 without any other phase or impurities and consistent with TEM results. This further confirms that the formation of TiO 2 homojunction does not change the crystal phase and TiO 2 homojunction has the same crystalline phase with that of TiO 2 NBs, while the peak intensity of TiO 2 homojunction is lower than that of pure TiO 2 NBs, which is a normal phenomenon with the second nucleation and growth, suggesting the successful synthesis of homojunction. The XRD pattern of TiO 2 NBs@TiO 2 NPs was also conducted shown in Figure S3, and these diffraction peaks can attribute to anatase TiO 2 , and this XRD pattern is with a rather bad crystallinity compared with TiO 2 NBs and TiO 2 homojunction, which may be due to the lack of high‐temperature calcinations.…”

“…In order to ensure the crystal structure of the asprepared materials, the XRD experiment was carried out. As shown in Figure 4A NBs, which is a normal phenomenon with the second nucleation and growth, 22 suggesting the successful synthesis of homojunction. The XRD pattern of TiO 2 NBs@TiO 2 NPs was also conducted shown in Figure S3, and these diffraction peaks can attribute to anatase TiO 2 , and this XRD pattern is with a rather bad crystallinity compared with TiO 2 NBs and TiO 2 homojunction, which may be due to the lack of high-temperature calcinations.…”

“…To solve these problems, the concept of homojunction was proposed, which is the kind of junction constructed by the same building blocks of nano-scale dimension. [20][21][22] Compared with heterojunction, homojunction structure is with a higher carrier transfer and lower electronhole pair recombination rate at the interface due to the little lattice mismatching and continuity of the chemical bonding. 23 Generally, homojunction was stepwise fabricated of the two units, which may lead to the band alignment to some extent, as well as the facet exposure.…”

Synergistic Mechanism of Rare-Earth Modification TiO2 and Photodegradation on Benzohydroxamic Acid

“…The peaks of Ti2p and O1s for pure TiO2 and Gd/TiO2 were analyzed as shown in Figure 4c-f. Ti peaks of pure TiO2 are located at 464.45 eV and 458.74 eV while Ti peaks of Gd/TiO2 are located at 464.48 eV and 458.76 eV. The peak of O1s was fitted into two peaks: crystal lattice oxygen and hydroxyl oxygen [11]. The fitted peak of O1s at 529.83 eV corresponded to the lattice oxygen while the peak at 530.31 eV corresponded to hydroxyl oxygen for pure TiO2.…”

“…However, our previous studies indicated that La/TiO 2 and Yb/TiO 2 possessed high photodegradation activity to BHA (the removal efficiency was up to 90% in 2 h) [10]. TiO 2 has been considered as the most promising photocatalyst among various semiconductor photocatalyst materials due to its benign physicochemical property and low cost [11]. In recent years, in order to improve the photocatalytic activity of TiO 2 , the research topics have been aimed at resolving the problems of wide band gap (3.2 eV) and easy recombination of photogenerated electron-hole pairs.…”