Activated carbon (AC) was fabricated from carrot waste using ZnCl₂ as the activating agent and calcined at 700 °C for 2 h in a tube furnace. The as-synthesized AC was characterized using Fourier-transform infrared spectroscopy, X-ray diffraction analysis, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and Brunauer–Emmett–Teller analysis; the results revealed that it exhibited a high specific surface area and high porosity. Moreover, this material displayed superior catalytic activity for the degradation of toxic Rhodamine B (RhB) dye. Rate constant for the degradation of RhB was ascertained at different experimental conditions. Lastly, we used the Arrhenius equation and determined that the activation energy for the decomposition of RhB using AC was approximately 35.9 kJ mol⁻¹, which was very low. Hopefully it will create a great platform for the degradation of other toxic dye in near future.

中文翻译：

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生物质衍生的活性炭作为有效降解罗丹明B染料的催化剂

使用ZnCl ₂从胡萝卜废料中制备活性炭（AC）作为活化剂，并在管式炉中于700°C煅烧2 h。合成后的交流电使用傅里叶变换红外光谱，X射线衍射分析，扫描电子显微镜，透射电子显微镜，X射线光电子光谱和Brunauer-Emmett-Teller分析进行表征。结果表明，它表现出高的比表面积和高的孔隙率。此外，该材料对有毒罗丹明B（RhB）染料的降解显示出优异的催化活性。在不同的实验条件下确定了RhB降解的速率常数。最后，我们使用Arrhenius方程确定使用AC分解RhB的活化能约为35.9 kJ mol ^-1，这非常低。希望它将在不久的将来为降解其他有毒染料创造一个很好的平台。