A total of 86 representative samples of diesel oil were selected to determine the solidifying point. These samples covered a wide range and the concentration is more evenly distributed. The near infrared spectroscopy (NIR) method to determine the diesel solidifying point was successfully designed. Multiple linear regression method was chosen to establish the calibration model. The regression coefficients, partial regression sum of squares, partial correlation coefficients, the total estimated standard deviation, correlation coefficient, residual sum of squares, and other model parameters were calculated. The repeatability of the NIR method is better than the standard method. It can be seen that this NIR method to determine the diesel solidifying is feasible and repeatable.
Copper hydroxyphosphate, Cu2(OH)PO4, with six hierarchical architectures was successfully synthesized through a hydrothermal route. The resulting hierarchical superstructures were characterized using powder X‐ray diffraction and scanning electron microscopy. In this hydrothermal process, the morphology of copper hydroxyphosphate changed drastically with the addition of different amounts of alcohol (ethanol, n‐propanol, or ethylene glycol) as solvent. A possible mechanism for the formation of these copper hydroxyphosphate hierarchical superstructures is proposed. This approach provides a facile strategy to synthesize copper hydroxyphosphate crystals with unique morphologies and complex architectures. This binary reaction medium (alcohol and water) could provide an alternative and versatile strategy for controlling inorganic microcrystals by manipulating the supersaturation of the growing solution.
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