Sub-micron CaCO3 particles with different morphologies were prepared in reverse micelles based on a CO2/N2 switchable surfactant (N′-dodecyl-N,N-dimethyl acetamidine bicarbonate).

Fe-Sn-O mixed oxides were synthesized and used as catalysts for Baeyer-Villiger oxidation of cyclohexanone, which showed both high catalytic activity and selectivity. X-ray powder diffraction and scanning electron microscopy suggested that the Fe-Sn-O catalysts had a tetragonal structure with a grain size of 29.3 nm. An ε-caprolactone yield as high as 98.8% was obtained in a small-scale experiment (5 mmol of cyclohexanone). In a scale-up test (20 mmol of cyclohexanone), the cyclohexanone conversion and ε-caprolactone yield were 96.7 and 96.5%, respectively. In addition, the catalysts can be reused five times without any major decline in catalytic activity.

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Mesoporousd ual-layer MnO 2 nanotubes assembled from well-aligned MnO 2 nanosheets are synthesized via af acile and efficient sacrificial templatem ethod. To begin with, the self-standingc arbon nanofibrous membranes are prepared via electrospinning and high-temperature carbonization, followed by an in situ redox reactioni nK MnO 4 solution to coat the carbon nanofiber (CNF) template with MnO 2 nanosheetsu ntil the CNFs are consumed. The synthesized dual-layer MnO 2 nanotubes are composed of an inner shell of packed MnO 2 ,a nd an outer shell of mesoporouss heetlike MnO 2 .I mportantly,t he dimensions of the MnO 2 nanotubes can be easily controlled by tuning parameters including CNF diameter and redox reaction temperature. The MnO 2 nanotube electrode thus prepared manifests excellent cycling stability with as pecificc apacitance of 231 Fg À1 and an areal capacitance of 309 mF cm À2 fors upercapacitors. This approach opens up an ew way for designing MnO 2 nanostructures as promising electrode materials.

Microcrystalline cellulose (MCC) was prepared easily from Rabdosia rubescens residue to realize the efficient utilization of waste resources. The yield was about 95.03% under the optimal conditions. Then, MCC membrane was prepared by phase transformation method and its structure and mechanical properties were studied systemically. The results showed the cellulose crystal structure changed from type I to type II in the process of forming membrane, and the thermal stability decreased simultaneously. The content of MCC in casting solution has great influence on the mechanical properties of membranes. The higher the content of MCC, the better the comprehensive mechanical properties of the membranes is. When MCC content is 9%, the tensile strength and elongation at break can reach 8.38 MPa and 26.72%, which is better than traditional cellulose membranes. Finally, the separation properties were studied by separation BSA from water. The results showed that the rejection rate and water flux changed positively and negatively with the change of MCC content. When the content was 5%, the membrane demonstrated the best comprehensive performance, its rejection for BSA was 37.23 g/(m2 h), the corresponding rejection rate and water flux were 88.87% and 41.89 L/(m2 h) respectively.