CAJ | 학술논문

为了进一步研究壳聚糖固载四(p 磺酸基苯基)钴卟啉催化氧化乙苯的性能,将四(p 磺酸基苯基)钴卟啉通过离子键接枝壳聚糖制备高分子催化材料Co TPPSO3-H3+N-CTS,用紫外可见光谱( UV-Vis)、傅里叶红外光谱(FT-IR)、X 射线衍射技术(XRD)、差热分析技术(TG)和透射电镜技术(TEM)对该催化材料进行结构表征,并研究其催化氧气氧化乙苯的作用。结果表明,在较优的温度(140℃)和氧气压力(0.8 MPa)反应条件下,用含有1 mg Co TPPSO3 H的固载催化材料可重复使用催化氧化乙苯8次,其平均乙苯转化率为17.7%,苯乙醇和苯乙酮的选择性为76.4%,相应的醇酮产率为13.5%,催化剂转化数为3.62×105。这表明壳聚糖通过离子键接枝和氨基配位固载的四(p 磺酸基苯基)钴卟啉不仅具有较好的催化性能,还提高了金属卟啉的重复使用催化效率。
위료진일보연구각취당고재사(p 광산기분기)고계람최화양화을분적성능,장사(p 광산기분기)고계람통과리자건접지각취당제비고분자최화재료Co TPPSO3-H3+N-CTS,용자외가견광보( UV-Vis)、부리협홍외광보(FT-IR)、X 사선연사기술(XRD)、차열분석기술(TG)화투사전경기술(TEM)대해최화재료진행결구표정,병연구기최화양기양화을분적작용。결과표명,재교우적온도(140℃)화양기압력(0.8 MPa)반응조건하,용함유1 mg Co TPPSO3 H적고재최화재료가중복사용최화양화을분8차,기평균을분전화솔위17.7%,분을순화분을동적선택성위76.4%,상응적순동산솔위13.5%,최화제전화수위3.62×105。저표명각취당통과리자건접지화안기배위고재적사(p 광산기분기)고계람불부구유교호적최화성능,환제고료금속계람적중복사용최화효솔。
In order to study the catalysis of chitosan-supported cobalt tetrakis( p-sulphophenyl) por-phyrin for oxidation of ethylbenzene, the cobalt tetrakis( p-sulphophenyl) porphyrin [ Co TPPSO3 H] was immobilized on chitosan[ CTS] by ionic bond and axial ligand interaction. The catalytic material [ Co TPPSO3-H3+N-CTS ] was characterized by UV-Vis and FT-IR spectra, X-ray diffraction ( XRD) pattern,TG and transmission electron microscope ( TEM) . The small amount of cobalt tet-rakis(p-sulphophenyl)porphyrin(1. 0 mg) in the supported catalyst could be reused 8 times under the optimal oxidation conditions of 140 ℃ and 0. 8 MPa. On average, it gave 17. 7% of ethyl-benzene conversion rate, 76. 4% of selectivity ( alcohol and ketone ) ,13. 5% of yields ( alcohol and ketone) and a catalyst turnover number of 3. 26×105. The results show that the chitosan can not only promote the catalysis of cobalt tetrakis( p-sulfophenyl) porphyrin for the ethylbenzene oxidation, but also enhance the recycling efficiency of catalyst, via graft and coordination immobilizatiion.