Preparation and Photodegradation of Photocatalytic Functional Fe2O3/TiO2 Ceramics
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摘要: 以九水硝酸铁和硫酸钛为原料,利用共沉淀法合成了Fe2Ti3/TiO2混合粉体,粉体压制成型的素坯经过高温烧结制备Fe2Ti3/TiO2陶瓷。通过XRD、SEM分析Fe2Ti3/TiO2多孔陶瓷的物相和微观结构,并通过对甲基蓝溶液(浓度为25mg/L)的降解研究其光催化性能和循环使用性能。结果表明:紫外和可见光条件下,该陶瓷第一次使用时对甲基蓝溶液的最大降解率分别是80%和94%,循环使用三次后,最大降解率分别仅下降16%和17%。所制备的Fe2Ti3/TiO2陶瓷具有良好的光催化性能和循环使用性能,且利于收集,可以广泛应用于污水处理。
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关键词:
- Fe2O3/TiO2陶瓷 /
- 光催化 /
- 循环使用性能 /
- 降解率
Abstract: Using iron nitrate nonahydrate (Fe(NO3)3·9H2O) and titanium sulfate (Ti(SO4)2) as raw materials,Fe2O3/ TiO2 mixed powders were synthesized by co-precipitation method. The green cylinders were formed under axial-pressure and sintered at high temperature to obtain the Fe2O3/TiO2 ceramics.Phase and microstructure of Fe2O3/ TiO2 porous ceramics were analyzed by XRD and SEM. The photocatalytic and recyclable performances of the ceramics material in the degradation of methyl blue (MB: 25 mg/L) were studied. The results indicate that after the first time of catalysis about 80% and 94% of MB is degraded with Fe2O3/ TiO2 ceramics respectively under the ultraviolet and visible (UV/vis) light,after three times of recycles the maximum degradation rate of MB by Fe2O3/ TiO2 ceramics only reduces by 16% and 17% under the ultraviolet and UV/Vis light,respectively. The Fe2O3/ TiO2 porous ceramics shows a good photocatalytic and recyclable performance,which is suggested to be a promising new photocatalysts widely used in the pollutant water treatment.-
Key words:
- Fe2O3/TiO2 ceramics /
- photocatalytic /
- recycling performance /
- degradation rate
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