Nano mesoporous silica molecular sieve material SBA (Santa Barbara Amorphous)-15 was prepared by hydrothermal method and characterized by means of powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and nitrogen adsorption-desorption studies. Butyl rhodamine B (BRB) was adsorbed by the SBA-15. The impacts of solution acidity, adsorbent dosage, the initial concentration of butyl rhodamine B, contact time, and temperature on the effects of adsorption were studied and the optimum adsorptive conditions were obtained. The experimental results of adsorption showed that the optimal adsorptive conditions were: pH = 5.0, (SBA-15): BRB = 750: 1, room temperature 30 ± 1 °C and the contact time 20 min. At this time, the adsorption capacity is 1.30 mg/g and the adsorption ratio is 97.52%. Dynamic and thermodynamic properties of the adsorption for butyl rhodamine B by SBA-15 were studied, and the results showed that the adsorption of butyl rhodamine B by SBA-15 is a pseudo-second-order kinetic adsorption. The adsorption thermodynamic data showed that in the 4–30 °C interval ∆G⁰ < 0, the reaction can occur spontaneously. ΔH⁰ = 38.731 kJ/mol > 0 showed that the adsorption of butyl rhodamine B by SBA-15 is an endothermic process. ΔS⁰ = 204.9 J / (mol · K) > 0 illustrated that the adsorption process is a reaction of entropy increase. In the 30–60 °C interval, ∆G⁰ < 0, the reaction can occur spontaneously. ΔH⁰ = −32.371 kJ/mol < 0 showed that the adsorption of butyl rhodamine B by SBA-15 is an exothermic process. ΔS⁰ = −30.2 J / (mol · K) < 0 illustrated that the adsorption process is a reaction of entropy decrease. ΔG⁰ is between −20 and −80 kJ/mol, showing that this adsorption is a coexisting of chemical and physical adsorption. The adsorption of butyl rhodamine B by SBA-15 satisfies the Freundlich adsorption isotherm and belongs to a heterogeneous adsorption.

采用水热法制备了纳米介孔二氧化硅分子筛材料SBA（Santa Barbara Amorphous）-15，并通过粉末X射线衍射（XRD），扫描电子显微镜（SEM），透射电子显微镜（TEM）和氮吸附-解吸研究。丁基罗丹明B（BRB）被SBA-15吸附。研究了溶液酸度，吸附剂用量，丁基若丹明B的初始浓度，接触时间和温度对吸附效果的影响，获得了最佳的吸附条件。吸附实验结果表明，最佳吸附条件为：pH = 5.0，（SBA-15）：BRB = 750：1，室温30±1℃，接触时间20min。此时的吸附容量为1.30mg / g，吸附率为97.52％。研究了SBA-15对丁基罗丹明B的吸附动力学和热力学性质，结果表明，SBA-15对丁基罗丹明B的吸附是伪二级动力学吸附。吸附热力学数据表明，在4–30°C区间∆G⁰  <0，反应可以自发发生。ΔH ⁰  = 38.731千焦/摩尔> 0表明，丁基罗丹明B通过SBA-15吸附是吸热过程。ΔS ⁰  = 204.9焦耳/（摩尔·K）> 0示出的是吸附过程是熵增加的反应。在30–60°C的区间∆G ⁰  <0中，反应可以自发发生。ΔH ⁰  = -32.371千焦/摩尔<0表明，丁基罗丹明B通过SBA-15吸附是放热过程。ΔS ⁰  = -30.2焦耳/（摩尔·K）<0示出的是吸附过程是熵减少的反应。ΔG ⁰在-20至-80kJ / mol之间，表明该吸附是化学和物理吸附的并存。SBA-15对丁基若丹明B的吸附满足Freundlich吸附等温线，属于非均相吸附。