| Data of high intensity peak of XRD at different tempratures | θ (degree) | Β (radian) (×10−3) | Particle size (nm) |
| PSCCO-30˚C | 12.698 | 7.539 | 18.865 |
| PSCCO-500˚C | 14.520 | 6.684 | 21.444 |
| PSCCO-850˚C | 15.509 | 6.353 | 22.668 |
| PSCCO-900˚C | 15.825 | 5.899 | 24.449 |