<br>聚苯胺对聚苯胺/煤复合材料吸附罗丹明 B 染料协同影响的高级平衡研究,ACS Omega

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聚苯胺对聚苯胺/煤复合材料吸附罗丹明 B 染料协同影响的高级平衡研究
ACS Omega ( IF 3.7 ) Pub Date : 2023-12-01 , DOI: 10.1021/acsomega.3c07355
Mohamed Adel Sayed _{1,

2} , Abdelrahman Mohamed ₂ , Sayed A Ahmed _{2,

3} , Ahmed M El-Sherbeeny ₄ , Wail Al Zoubi ₅ , Mostafa R Abukhadra _{1,

6}

Affiliation

使用传统的平衡模型和先进的等温线研究评估了聚苯胺（PANI）杂化过程对PANI/煤杂化材料（PANI/C）吸附罗丹明B染料（RB）的协同改善效果。该复合材料是通过在煤馏分存在下聚合聚苯胺制备的，表面积为27.7 m ² /g。与煤颗粒 (254.3 mg/g) 相比，PANI/C 杂化物具有更高的吸附 RB 染料的能力 (423.5 mg/g)。使用活性位点密度 (Nm) 的空间特征以及单个活性位点上吸附的 RB 总数 (n) 说明了 PANI/C 消除性能的持续增加。然而，PANI的加入并没有对现有活性位点的数量产生任何实质性影响，但杂交过程极大地影响了每个活性位点的选择性和亲和力，以及染料与复合材料相互作用时的聚集特性。表面。原煤只能吸附 3 个 RB 分子，而整个 PANI/C 表面的每个活性位点可以吸附大约 8 个 RB 分子。这也是 RB 染料以垂直排列吸附的证据，涉及多分子过程。高斯能（4.01–5.59 kJ/mol）和吸附能（−4.34–4.68 kJ/mol）揭示了物理机制的可控影响。这些机制可能包括范德华力、偶极-偶极相互作用和氢键 (<30 kJ/mol)。已评估的热力学函数（例如焓、内能和熵）提供了支持 PANI/C 吸收 RB 过程的放热和自发性质的证据。

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Advanced Equilibrium Studies for the Synergetic Impact of Polyaniline on the Adsorption of Rhodamine B Dye by Polyaniline/Coal Composite

The synergetic improvement effect of the polyaniline (PANI) hybridization process on the adsorption of rhodamine B dye (RB) by PANI/coal hybrid material (PANI/C) has been evaluated using both traditional equilibrium modeling and advanced isotherm investigations. The composite was prepared by polymerizing polyaniline in the presence of coal fractions with a surface area of 27.7 m²/g. The PANI/C hybrid has an improved capacity to adsorb RB dye (423.5 mg/g) in comparison to coal particles (254.3 mg/g). The maintained increase in the elimination properties of PANI/C has been illustrated using the steric characteristics of active site density (Nm) as well as the total number of adsorbed RB on a single active site (n). However, the incorporation of PANI did not yield any substantial impact on the existing active sites’ quantity, but the hybridization processes greatly influenced the selectivity and affinity of each active site, in addition to the aggregation characteristics of the dye as it interacts with the composite’s surface. Whereas raw coal can only adsorb three molecules of RB, each active site throughout the PANI/C surface can adsorb approximately eight RB molecules. This is also evidence of RB dye adsorption in a vertical arrangement, which involves multimolecular processes. The Gaussian energy (4.01–5.59 kJ/mol) and adsorption energy (−4.34–4.68 kJ/mol) revealed the controllable impact of physical mechanisms. These mechanisms may include van der Waals forces, dipole–dipole interactions, and hydrogen bonds (<30 kJ/mol). The thermodynamic functions, such as enthalpy, internal energy, and entropy, that have been assessed provide evidence supporting the exothermic and spontaneous nature of the RB uptake processes by PANI/C.

更新日期：2023-12-01

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