•Dual templates synthesis of intergrowth AEI/CHA and pure AEI zeolites.•Template composition affects the size and acidity of the final crystal.•Longer crystallization time converts metastable AEI phase into stable CHA phase.•The extending of crystallization time is against the formation of light olefins.A series of SAPO molecular sieves were hydrothermally synthesized by employing mixture template of diethylamine (DEA) and N, N′-diisopropylethylamine (DIEA). The influences of template composition and crystallization time were investigated systematically. The results revealed that the crystalline products switched from SAPO-34/5 to SAPO-18/34 and finally to SAPO-18, the crystal size and acidity decreased with the increasing of DIEA ratio in the mixed template. Furthermore, crystallization time was also found to play a significant role in the particulate properties of the zeolites, the metastable AEI phase converted into more stable CHA phase, the Si content and acidity increased with the prolonged crystallization time. Dimethyl ether (DME) to olefins (DTO) reactions showed that the extending of the crystallization time was against the formation of light olefins, but favorable for the formation of light alkanes, due to the increase in CHA/AEI ratio, particle size and acidity may increase the probability of unfavorable hydrogenation of the target light olefins.

In2O3 quantum dots with a high crystallinity were deposited on the surface of ZnO nanorods through a chemistry bath method. The resulting In2O3-sensitizing ZnO nanorod arrays not only exhibited enhanced photoelectrochemical activity for water splitting under visible-light irradiation, but also possessed anti-photocorrosion property. The photo-induced charge-transfer property of In2O3 could be improved greatly by coupling with ZnO. This observation demonstrated that the heterojunction at the interface between In2O3 and ZnO could efficiently reduce the recombination of photo-induced electron–hole pairs and increase the lifetime of charge carriers and therefore enhance the photo-to-current efficiency of the In2O3–ZnO nanocrystalline arrays. It reveals that the heterojunction construction between two different semiconductors plays a very important role in determining the dynamic properties of their photogenerated charge carriers and their photo-to-current conversion efficiency.

Bi2MoO6–RGO composite nanoplates with good uniformity and highly oriented growth of the active lattice were successfully synthesized by a simple hydrothermal process with the assistance of graphene oxide. Reduced graphene oxide was observed to be formed on the surface of the Bi2MoO6 nanoplates after the hydrothermal treatment. A remarkable enhancement in the visible-light-driven (VLD) photocatalytic destruction of bacteria was observed over the Bi2MoO6–RGO composite when compared to pure Bi2MoO6.

•Copolymers synthesized with various ratios of aniline to formaldehyde in acid media.•Molecular structure of aniline–formaldehyde copolymers were studied spectrally.•Copolymers can act as effective corrosion inhibitors for mild steel in HCl solution.•Effect of aniline/formaldehyde ratio on copolymer corrosion inhibition is revealed.Aniline–formaldehyde copolymers with different molecular structures have been prepared and investigated for the purpose of corrosion control of mild steel in hydrochloric acid. The copolymers were synthesized by a condensation polymerization process with different ratios of aniline to formaldehyde in acidic precursor solutions. The corrosion inhibition efficiency of as-synthesized copolymers for Q235 mild steel was investigated in 1.0 mol L−1 hydrochloric acid solution by weight loss measurement, potentiodynamic polarization, and electrochemical impedance spectroscopy, respectively. All the results demonstrate that as-prepared aniline–formaldehyde copolymers are efficient mixed-type corrosion inhibitors for mild steels in hydrochloric acid. The corrosion inhibition mechanism is discussed in terms of the role of molecular structure on adsorption of the copolymers onto the steel surface in acid solution.