Biomass-derived activated carbon/cerium oxide nanocomposite as adsorptive photocatalyst for effective removal of carcinogenic dye

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Research Bulletin Pub Date : 2024-11-19 DOI:10.1016/j.materresbull.2024.113212

K. Sumi, K.S. Supraja, R.C. Aashika, M. Arivanandhan

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Abstract

Semiconductor-based photocatalysts offer potential solutions for carcinogenic dye-related issues in water under light irradiation. However, their efficiency is affected by the recombination of photoelectrons and holes. The present study focuses on synthesizing biomass-derived activated carbon (AC), Cerium Oxide (CeO₂), and AC/CeO₂ (ACO) nanocomposites for toxic dye degradation. The physicochemical properties of samples were analyzed by XRD, SEM, EDX, TEM, UV–visible, Raman, XPS, and PL analysis. The photocatalytic performance of AC, CeO_2, and ACO nanocomposites was evaluated under dark and light conditions for the removal of carcinogenic Rhodamine B (RhB). ACO nanocomposites exhibited adsorptive-photocatalytic performance, displaying unique adsorption and photocatalytic degradation rates due to their synergistic combination. Remarkably, the ACO-4 composite showed lower recombination of e⁻/h⁺ pairs, thereby exhibiting superior photocatalytic activity compared to other samples. The degradation rate constant under light was 0.1815 min⁻¹ with a half-life time of 3.81 min, whereas in dark, it was 0.0665 min⁻¹ with a half-life time of 10.42 min.

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生物质衍生活性炭/氧化铈纳米复合材料作为吸附性光催化剂有效去除致癌染料

基于半导体的光催化剂为解决光照射下水中与致癌染料有关的问题提供了潜在的解决方案。然而，它们的效率受到光电子和空穴重组的影响。本研究的重点是合成生物质衍生的活性炭（AC）、氧化铈（CeO2）和 AC/CeO2 纳米复合材料（ACO），用于降解有毒染料。通过 XRD、SEM、EDX、TEM、UV-visible、Raman、XPS 和 PL 分析了样品的理化性质。评估了 AC、CeO2 和 ACO 纳米复合材料在黑暗和光照条件下去除致癌物质罗丹明 B（RhB）的光催化性能。ACO 纳米复合材料具有吸附和光催化性能，由于它们的协同作用，显示出独特的吸附和光催化降解率。值得注意的是，与其他样品相比，ACO-4 复合材料的 e-/h+ 对重组率更低，因此表现出更高的光催化活性。在光照条件下，降解速率常数为 0.1815 min-¹，半衰期为 3.81 min；而在黑暗条件下，降解速率常数为 0.0665 min-¹，半衰期为 10.42 min。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.