Figure 4.

a TEM image of a single ZnO nanobelt obtained by annealing the porous ZnO nanobelt in air at 1,000°C for 1 h. The scale bar is 100 nm. b UV–vis spectra of 1 and 2 correspond the methyl orange solution, after 2 h irradiation, containing PZNF before and after annealing for 1 h, respectively

Wang et al. Nanoscale Research Letters 2010 5:1800-1803   doi:10.1007/s11671-010-9715-x