Monodisperse α-Fe2O3 Mesoporous Microspheres: One-Step NaCl-Assisted Microwave-Solvothermal Preparation, Size Control and Photocatalytic Property

Table 1 Experimental parameters for the preparation of typical samples by the microwave-solvothermal method

Sample no.	Solution	Temperature (°C)	Time (min)	Size (nm)
1	0.404 g Fe(NO₃)₃ · 9H₂O + 0.117 g NaCl + 0.111 g PVP + 15 ml H₂O + 15 ml ethanol	120	30	ca. 170
2	0.404 g Fe(NO₃)₃ · 9H₂O + 0.111 g PVP + 15 ml H₂O + 15 ml ethanol	120	30	/
3	0.404 g Fe(NO₃)₃ · 9H₂O + 0.117 g NaCl + 15 ml H₂O + 15 ml ethanol	120	30	/
4	0.404 g Fe(NO₃)₃ · 9H₂O + 0.117 g NaCl + 0.222 g PVP + 15 ml H₂O + 15 ml ethanol	120	30	ca. 205
5	Same as sample 1	120	60	ca. 225
6	Same as sample 1	140	30	ca. 260