CAJ | 학술논문

运用连续在线原位衰减全反射傅里叶变换红外光谱(ATR-FTIR)技术测定了纳米CuO表面对丁基黄药的吸附行为。在FTIR谱图中发现有峰的红移现象,吸收峰由1200 cm-1偏移到1193 cm-1,用超纯去离子水脱附,峰强度只有微小的变化,可判断丁基黄药在CuO表面发生了很强的化学吸附。通过对吸附行为进行二维(2D)红外光谱分析,分辨出吸附过程中光谱强度的变化顺序。二维异步相关光谱测定结果表明,1265 cm-1处振动吸收峰最先引起光谱强度的变化,1265 cm-1处吸收峰可归因为表面反应生成的双黄药和黄药分子聚集体的复合峰。根据1200 cm-1处黄药特征吸收峰强度的变化,进行吸附动力学模拟,得出CuO对丁基黄药的最大吸附量为529 mg?g-1,且吸附符合拟二级吸附动力学过程。
운용련속재선원위쇠감전반사부리협변환홍외광보(ATR-FTIR)기술측정료납미CuO표면대정기황약적흡부행위。재FTIR보도중발현유봉적홍이현상,흡수봉유1200 cm-1편이도1193 cm-1,용초순거리자수탈부,봉강도지유미소적변화,가판단정기황약재CuO표면발생료흔강적화학흡부。통과대흡부행위진행이유(2D)홍외광보분석,분변출흡부과정중광보강도적변화순서。이유이보상관광보측정결과표명,1265 cm-1처진동흡수봉최선인기광보강도적변화,1265 cm-1처흡수봉가귀인위표면반응생성적쌍황약화황약분자취집체적복합봉。근거1200 cm-1처황약특정흡수봉강도적변화,진행흡부동역학모의,득출CuO대정기황약적최대흡부량위529 mg?g-1,차흡부부합의이급흡부동역학과정。
In this study, a continuous online in situ attenuated total reflection Fourier-transform infrared (ATR-FTIR) spectroscopic technique was used to monitor the behavior of butyl xanthate adsorbed on CuO nanoparticle surfaces. A red-shift phenomenon, i.e., the absorption peak at 1200 cm-1 shifted to 1193 cm-1, was observed in the FTIR spectra. However, there was no obvious change in the peak intensity after desorption using ultrapure deionized water, indicating that butyl xanthate was chemisorbed on the CuO surface. We determined the order of the spectral intensity changes in the adsorption process using two-dimensional (2D) IR spectroscopy. The 2D asynchronous spectra showed that the spectral intensity of the characteristic peak at 1265 cm-1 changed first. This may be attributable to the combined peaks of dixanthogen and xanthate molecular aggregates at the surfaces. The adsorption kinetics was studied by monitoring the intensity changes of the xanthate characteristic peak at 1200 cm-1. The adsorption kinetic data showed that the maximum chemisorption capacity of CuO for butyl xanthate was 529 mg?g-1, and the adsorption kinetics can be described by a pseudo-second-order reaction model.