| abstract |
【Task】 To provide a binary porous silica having a large nanopore diameter, a high breaking load, and reduced pulverization during filling or use. Another object of the present invention is to provide a method for producing the above-mentioned binary porous silica efficiently with good reproducibility. [Solution] Nanopores having an average diameter in the range of 5 to 50 nm and macropores having an average diameter in the range of 0.1 to 20 μm are formed, and the volume of the nanopore is 0.4 to 1 Within the range of 0.5 cm 3 / g, the macropore volume is within the range of 0.6 to 2.0 cm 3 / g, and the compressive strength is in the range of 10 kg / cm 2 to 20 kg / cm 2. It is set as the double pore silica characterized by being in the inside. [Selection] Figure 1 |