1. Institute of Road Engineering, Zhejiang Scientific Research Institute of Transport, Hangzhou 310023, China 2. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310027, China
A photocatalytic composite material was prepared by cold-alkali corrosion treatment and high-temperature adhesion technique in order to obtain a photocatalytic composite material with high catalytic activity and good wear resistance. Then scanning electron microscope (SEM), X-ray diffraction (XRD) and UV-Vis and other equipment were used to characterize the sample. The anti-wearing performance and photocatalytic of this composite material were tested by kneading machine and custom-designed environmental test setup, respectively, using exhaust gas of automobile. Results showed that nano-TiO2 embedded on the surface of hollow glass microspheres homogeneously. Hollow glass microspheres/nano-TiO2 composite photocatalyst has higher light transmission ability and degradation efficiency than pure nano-TiO2. The composite material has significant degradation effects on nitric oxide and nitrogen dioxide in automobile exhaust. The purification effect of nitrogen oxides is higher than carbon monoxide and sulfur dioxide, and has good anti-wearing ability.
Shou-jing YAN,Yang-yang WANG,Feng-xia CHI,Xue LUO. Characterization and synthesis of hollow glass microspheres/nano-TiO2 composite material. Journal of ZheJiang University (Engineering Science), 2021, 55(4): 713-719.
Tab.1Effective content of nano-TiO2 in per unit composite catalyst
Fig.1Testing process of photocatalytic performance
Fig.2Kneading machine
Fig.3SEM images of samples at different magnification
Fig.4X-ray diffraction patterns of different samples
Fig.5Transmission spectrum of hollow glass bead，nano-TiO2 and hollow glass bead-TiO2
降解 对象
纳米TiO2
空心玻璃微珠-纳米TiO2复合材料
${V_{\max }}$/(mg·m?3·min?1)
$K$/%
${V_{\max }}$/(mg·m?3·min?1)
$K$/%
NO
2.34
88.24
3.41
89.38
NO2
1.20
88.89
1.70
91.67
CO
17.1
9.47
22.90
14.52
SO2
1.29
9.70
1.51
12.00
Tab.2Evaluation results of exhaust degradation effects in single stage
Fig.6Remove efficiency of NO，NO2，SO2 and CO
Fig.7Residual remove efficiency of NO，NO2，SO2 and CO
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