Three‐quarter‐sphere‐like γ‐AlOOH superstructures were successfully fabricated by a simple hydrothermal route exploiting the layered hydroxide structure. Several techniques such as X‐ray diffraction (XRD), FTIR spectroscopy, field‐emission scanning electron microscopy (FE‐SEM), transmission electron microscopy (TEM), DSC thermal analysis, and nitrogen adsorption/desorption measurements were used to characterize the products. The possible formation mechanism of the three‐quarter‐sphere‐like structure was proposed and discussed. The γ‐AlOOH superstructures have high Brunauer–Emmett–Teller (BET) surface area and high adsorptive capacity. On the basis of these properties, they could be potentially used for removing chromium ions from highly toxic pollutant solutions and harmful tobacco‐specific nitrosamines (TSNAs) from cigarette smoke.

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The basic requirement of polymer for chemical flooding was introduced, development progress and performance evaluation of salt-resistant polymers for chemical flooding were discussed, and development direction of polymers for chemical flooding was indicated in this paper.

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Ultra-high performance liquid chromatography was employed for the determination of imidazole, 4-methylimidazole, and 2-methylimidazole in cigarette additives. Following solid phase extraction and filtration, the analytes were separated using isocratic elution with 5 mmol/L acetonitrileammonium formate (80:20, v/v) at 0.5 mL/min. The quantification of these analytes was achieved with the external standard method on a diode-array detector at 215 nm. Baseline separation was achieved within 1.3 min. The linear dynamic ranges for imidazole, 4-methylimidazole, and 2-methylimidazole were between 0.0375 and 18.0300 mg/kg. The limits of detection for the analytes were 0.0094 mg/kg. The recoveries and the relative standard deviations at fortification levels of 0.1322 mg/kg to 1.6220 mg/kg were 95.20% to 101.93% and 0.55% to 2.54%, respectively. The method offers easy operation, rapid analysis, and accurate results, and is suitable for the determination of imidazole, 4-methylimidazole and 2-methylimidazole in cigarette additives.