提高天然赤铁矿支撑钴在刚果红染料催化氧化中的反应活性和稳定性

IF 2.1 4区 化学 Q3 CHEMISTRY, PHYSICAL Catalysis Surveys from Asia Pub Date : 2024-03-09 DOI:10.1007/s10563-024-09423-4
Sourour Salhi, Abdessalem Omri, Ridha Ben Salem, Mourad Benzina
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引用次数: 0

摘要

摘要 采用简单的浸渍技术成功制备了天然赤铁矿负载钴(Co/Nat-Hem)这种新型异相催化剂。采用 BET、XRD、FT-IR、XRF、pHpzc、SEM-EDX 等方法对所制备催化剂的质构、结构、官能团和形态进行了分析。BET 分析表明,Co/Nat-Hem 催化剂的比表面积为 13.44 m2/g,孔体积为 0.062 cm3/g。SEM-EDX 方法显示,7.19 wt%的钴物种分散在制备的催化剂表面。通过对染料聪红(CR)进行光-芬顿氧化,评估了 Co/Nat-Hem 的催化活性。研究了反应参数对聪红氧化效率的影响。在最佳反应条件下(催化剂浓度为 1 g/L,H2O2 初始浓度为 0.2 mol/L,pH 值为 3),30 分钟后 CR 的褪色率达到 97%。Co/Nat-Hem 催化剂的增效比达到 28.5%,增加了 Nat-Hem 催化剂的氧化率。在 CR 的均相 Fenton 氧化过程中,浸出物的活性有限,这证明了 Co/Nat-Hem 催化剂的稳定性。在灌溉蚕豆(Vicia faba L.)时测试了 CR 染料的植物毒性。
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Enhanced Reactivity and Stability of Natural Hematite Supported Cobalt for the Catalytic Oxidation of Congo Red Dye

Natural hematite supported cobalt (Co/Nat-Hem), a new heterogeneous catalyst, was successfully prepared by a simple impregnation technique. Textural, structural, functional groups and morphological aspects of the prepared catalyst were analyzed by BET, XRD, FT-IR, XRF, pHpzc, SEM-EDX methods. BET analysis shows that the Co/Nat-Hem catalyst has a specific surface area of ​​13.44 m2/g and a pore volume of 0.062 cm3/g. The SEM-EDX method showed that 7.19 wt% of the cobalt species were dispersed on the surface of the prepared catalyst. The catalytic activity of Co/Nat-Hem was evaluated by photo-Fenton oxidation of the dye Cong red (CR). The effect of reaction parameters on CR oxidation efficiency was investigated. Under optimal reaction conditions (1 g/L catalyst concentration, 0.2 mol/L H2O2 initial concentration and pH 3), the percentage of CR discoloration reaches 97% after 30 min. The Co/Nat-Hem catalyst achieved a synergistic ratio of 28.5%, which was added to the oxidation rate of the Nat-Hem catalyst. The stability of the Co/Nat-Hem catalyst was demonstrated by the limited activity of leachates in the homogeneous Fenton oxidation of CR. The phytotoxicity of the CR dye was tested during the irrigation of the bean (Vicia faba L.).

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来源期刊
Catalysis Surveys from Asia
Catalysis Surveys from Asia 化学-物理化学
CiteScore
4.80
自引率
0.00%
发文量
29
审稿时长
>12 weeks
期刊介绍: Early dissemination of important findings from Asia which may lead to new concepts in catalyst design is the main aim of this journal. Rapid, invited, short reviews and perspectives from academia and industry will constitute the major part of Catalysis Surveys from Asia . Surveys of recent progress and activities in catalytic science and technology and related areas in Asia will be covered regularly as well. We would appreciate critical comments from colleagues throughout the world about articles in Catalysis Surveys from Asia . If requested and thought appropriate, the comments will be included in the journal. We will be very happy if this journal stimulates global communication between scientists and engineers in the world of catalysis.
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