For example, titanium dioxide (a naturally occurring mineral often used as a pigment or thickener) is considered to be safe when put into a viscous mixture, such as in sunscreen or toothpaste.
例如，二氧化钛（一种天然矿物，可用做着色剂或粘稠剂）在粘稠状混合物中是安全的，如防晒露或牙膏。
Titanium dioxide has unique characteristics, such as the surface hydroxy groups involved, wetting properties, surface acidity or basicity, surface electrical properties and photochemical activity.
二氧化钛具有表面羟基、润湿性、表面酸碱性、表面电性、光化学活性等表面物理化学性质。
Mesoporous titanium dioxide have shown potential applications in wide fields such as catalysis, adsorption, separation and so on.
介孔二氧化钛特殊的结构和性能，使其在催化、吸附、分离等领域展现出广阔的应用前景。
Semiconducting metal oxides such as tin oxide (SnO2), titanium dioxide (TiO2) and zinc oxide (ZnO) are routinely used as active materials in solid state gas sensing devices.
半导体型的金属氧化物，如氧化锡(SnO2)、氧化钛(TiO2)和氧化锌(ZnO)，经常作为活性材料用在固态气体传感器件中。
Semiconducting metal oxides such as tin oxide (SnO2), titanium dioxide (TiO2) and zinc oxide (ZnO) are routinely used as active materials in solid state gas sensing devices.
半导体型的金属氧化物，如氧化锡(SnO2)、氧化钛(TiO2)和氧化锌(ZnO)，经常作为活性材料用在固态气体传感器件中。
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