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Efficient mineralization of phenol by a temperature-responsive polyoxometalate catalyst under wet peroxide oxidation at lower temperatures

机译:温度响应型多金属氧酸盐催化剂在较低温度下湿式过氧化物氧化作用下可有效矿化苯酚

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Herein, a temperature-responsive polyoxometalate (POM) catalyst [C16H33(CH3)3N]3[PO4{WO(O2)2}4]/poly(N-isopropylacrylamide) (abbreviated as (C16PW(O2)2/PNIPAM) was prepared and used in the catalytic wet peroxide oxidation (CWPO) of phenol under mild conditions. The POM catalyst C16PW(O2)2/PNIPAM showed a higher degradation efficiency and mineralization of phenol with H2O2 at room temperature or even at lower temperature (0 °C) within a short time (120 min). The high efficiency at lower temperature was attributed to its temperature-responsive property, wherein the lattice of the temperature-sensitive polymer relaxed at lower temperature and then wrinkled at higher temperature. These characteristics also permitted C16PW(O2)2/PNIPAM to be easily separated for recycling. The leaching test indicated that the POM catalyst exhibited excellent stability and little leaching and can be used as a thermosensitive catalyst for about six times. C16PW(O2)2/PNIPAM has potential application in the CWPO of phenol without the limitation of temperature and pH conditions.
机译:本文中,一种温度响应型多金属氧酸盐(POM)催化剂[C 16 H 33 (CH < sub> 3 3 N] 3 [PO < sub> 4 {WO(O 2 2 } 4 ] / poly( N -异丙基丙烯酰胺)(缩写为(C 16 PW(O制备了 2 2 / PNIPAM),并将其用于苯酚的湿式催化过氧化(CWPO)。 POM催化剂C 16 PW(O 2 2 / PNIPAM对H 2 O 2 的苯酚具有较高的降解效率和矿化作用在室温下,甚至在短时间内(120分钟)在更低的温度(0°C)下,低温下的高效率归因于其对温度敏感的p罗斯蒂,其中热敏聚合物的晶格在较低温度下松弛,然后在较高温度下起皱。这些特征还允许C 16 PW(O 2 2 / PNIPAM易于分离以便回收。浸出试验表明,POM催化剂表现出优异的稳定性和很少的浸出,并且可以用作热敏催化剂约六次。 C 16 PW(O 2 2 / PNIPAM可以在苯酚的CWPO中潜在应用,而不受温度和pH条件的限制。

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