A N, S-Containing Graphene Oxide Composite for the Adsorptive Removal of p-Nitrophenol from Aqueous Solutions

文献类型： 外文期刊

第一作者： Yang, Bi

作者： Yang, Bi;Hu, Wei-Guo;Gao, Guan-Jin;Yu, Jin-Gang;Shi, Tao-Tao;Liu, Yi-Ping

作者机构：

关键词： graphene oxide; 3-amino-5-mercapto-1,2,4-triazole; adsorption; p-nitrophenol

期刊名称：MOLECULES （ 影响因子：4.6； 五年影响因子：5.0 ）

ISSN：

年卷期： 2025 年 30 卷 9 期

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收录情况： SCI

摘要： A novel 3-amino-5-mercapto-1,2,4-triazole functionalized graphene oxide composite (GO-ATT) was successfully prepared via a covalent coupling method, then employed for the removal of p-nitrophenol (PNP) from wastewater. The morphology as well as the composition of GO-ATT composite were investigated using Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), X-ray diffraction spectroscopy (XRD), and X-ray photoelectron spectroscopy (XPS). The surface charge of GO-ATT composite was evaluated by Zeta potential analyses. The surface area and pore size distribution of GO-ATT composite were analyzed using specific surface analyses using the Brunauer-Emmett-Teller (BET) method. Batch adsorption experiments were performed to investigate the effects of conditional factors, including contact time, solution pH, initial PNP concentration, and contact temperature, on the adsorption process. A maximum adsorption capacity of PNP by GO-ATT composite (0.287 mmol g(-1)) could be obtained at 25 degrees C. Freundlich isotherm (R-2 > 0.92505) can better describe the adsorption behavior of PNP on GO-ATT composite. The thermodynamic functions (Delta G degrees, Delta H degrees, Delta S degrees) indicate that adsorption is a spontaneous, endothermic, entropy-increasing process and features physisorption. The adsorption behavior of PNP on GO-ATT composite conformed to the nonlinear pseudo-second-order kinetic model. Adsorption mechanism investigation indicated that the electrostatic, pi-pi stacking, and hydrogen bonding interactions were involved in the adsorption process. After 10 adsorption-desorption cycles, the adsorbent exhibited a stable and efficient removal rate (94%) for PNP. Due to its advantages of a high efficiency, excellent reusability, and high stability, the covalently coupled GO-ATT composite might be used as an effective adsorbent for the removal of phenolic contaminants from wastewater.

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