CAJ | 학술논문

以Na2WO4·2H2O和Bi(NO3)3·5H2O为原料，通过不同表面活性剂为模板剂对所制备催化剂的形貌进行调控，将调控形貌后的催化剂固载不同种类杂多酸(HPA)，再进行超临界流体干燥制得HPA/Bi2WO6光催化剂。并采用X射线衍射( XRD)、紫外-可见漫反射( UV-vis)、扫描电镜( SEM)、比表面积测定仪( BET)对所制备的催化剂进行表征，通过含氮模拟油对固载杂多酸后的催化剂的脱氮性能进行评价。结果表明，十二烷基硫酸钠( SDS)能起到更好的模板导向作用，从而获得由二维纳米片组装成的三维中空花状结构。采用超临界流体萃取干燥技术对催化剂进行提纯干燥，可有效地避免孔塌陷、团聚等现象，进一步增大了催化剂的比表面积，其脱氮效果有了进一步的提高。固载磷钨酸能有效地提高催化剂的表面酸性位点，从而显著提高了催化剂的催化活性，磷钨酸固载量为10%、剂油比为1：100时、氙灯光照3 h脱氮率可达92.08%。
이Na2WO4·2H2O화Bi(NO3)3·5H2O위원료，통과불동표면활성제위모판제대소제비최화제적형모진행조공，장조공형모후적최화제고재불동충류잡다산(HPA)，재진행초림계류체간조제득HPA/Bi2WO6광최화제。병채용X사선연사( XRD)、자외-가견만반사( UV-vis)、소묘전경( SEM)、비표면적측정의( BET)대소제비적최화제진행표정，통과함담모의유대고재잡다산후적최화제적탈담성능진행평개。결과표명，십이완기류산납( SDS)능기도경호적모판도향작용，종이획득유이유납미편조장성적삼유중공화상결구。채용초림계류체췌취간조기술대최화제진행제순간조，가유효지피면공탑함、단취등현상，진일보증대료최화제적비표면적，기탈담효과유료진일보적제고。고재린오산능유효지제고최화제적표면산성위점，종이현저제고료최화제적최화활성，린오산고재량위10%、제유비위1：100시、선등광조3 h탈담솔가체92.08%。
The HPA/Bi2WO6 was prepared with Na2WO4·2H2O, Bi(NO3)3·5H2O and different surfactant templates. The prepared sample was dried by the supercritical fluid drying (SCFD) method. It was characterized with XRD, FT-IR and SEM techniques and N2 sorption experiment. Its photocatalytic properties were evaluated with denitrification of nitrogen-containing simulated oil as model reaction. It was shown that the sodium dodecyl sulfate ( SDS ) should be chosen as template. With this template, a highly dispersed, crystalline and active photocatalyst was obtained. This catalyst had a larger specific surface area. The SCFD method effectively decreased pore collapse and particles agglomeration degree, consequently increasing the specific surface area and improving the catalytic performance. Immobilization of H3 PW12 O40 on Bi2 WO6 increased the surface acid sites, and hence the photocatalytic activity. When the H3 PW12 O40 loading was 10%, about 92. 08% of nitrogen in simulated oil were removed by shining for 3 h with a xenon lamp at the mcatalysts/msimulated oil ratio of 1:100.