Highly efficient adsorption and visible-LEDs-driven photodegradation of tetracycline over novel and green-synthesized p-BiOI/n-Bi2WO6 heterojunctions

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2024-10-05 DOI:10.1016/j.ceramint.2024.10.038

Abraham Aram López-Cano , Roberto Leyva-Ramos , Brenda Azharel Jiménez-López , Damarys Haidee Carrales-Alvarado , Esmeralda Mendoza-Mendoza

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引用次数: 0

Abstract

Preparing bismuth compounds-based heterojunctions with superior redox capability has emerged as a promising strategy for environmental remediation. Herein, p-BiOI/n-Bi₂WO₆ heterojunctions were successfully obtained via a novel, facile, and green solvothermal method. The heterojunctions were synthesized using different mass ratios (1:2, 1:1, and 2:1) of BiOI (BI) and Bi₂WO₆ (BW), with 1:1 as the best ratio, which was decorated with silver nanoparticles (Ag-NPs) and nitrogen-doped graphene (NG) applying green methodologies. The as-prepared BI/BW heterojunctions were characterized by several techniques, and their adsorption capacity and photodegradation activity toward tetracycline (TC) under 19 W visible LEDs illumination were investigated. The capacity of pure BI, BW and BI/BW heterojunctions for adsorbing TC ranged from 14 to 68 mg/g; among the heterojunctions, Ag/1BI/1BW showed the highest TC adsorption capacity, 35 mg/g. Moreover, the photocatalytic tests revealed that the Ag/1BI/1BW exhibited the highest catalytic performance, achieving a TC percentage degradation of 81 % within 120 min. The low nominal power consumption of the LED-based photoreactor (0.0475 kWh) was significantly lower than that reported in the literature for using Xe or Hg lamps. In addition, catalyst dosage, initial TC concentration, and solution pH were investigated, demonstrating that they play important role in TC photodegradation. Scavenger assays determined that the degradation of TC using Ag/1BI/1BW proceeds mainly via superoxide radicals and holes, which agrees with the carrier transfer mechanism postulated for this heterojunction. TOC analysis revealed that the efficiency of Ag/1BI/1BW was 63 %, and reuse tests confirmed its high performance even after three cycles. This research provides new insights into the design of high-performance heterojunctions for water treatment.

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新型绿色合成的 p-BiOI/n-Bi2WO6 异质结对四环素的高效吸附和可见光驱动的光降解

制备具有卓越氧化还原能力的基于铋化合物的异质结已成为一种前景广阔的环境修复策略。本文通过一种新颖、简便、绿色的溶热法成功制备了p-BiOI/n-Bi2WO6异质结。采用不同质量比（1:2、1:1 和 2:1）的 BiOI（BI）和 Bi2WO6（BW）合成了异质结，其中 1:1 为最佳质量比，并采用绿色方法对其进行了银纳米颗粒（Ag-NPs）和掺氮石墨烯（NG）装饰。通过多种技术对制备的 BI/BW 异质结进行了表征，并研究了它们在 19 W 可见光 LED 照射下对四环素（TC）的吸附能力和光降解活性。纯 BI、BW 和 BI/BW 异质结对四环素的吸附能力介于 14 至 68 mg/g 之间；其中，Ag/1BI/1BW 对四环素的吸附能力最高，为 35 mg/g。此外，光催化测试表明，Ag/1BI/1BW 的催化性能最高，在 120 分钟内实现了 81% 的 TC 降解。基于 LED 的光反应器的额定功耗较低（0.0475 kWh），大大低于文献报道的使用 Xe 或 Hg 灯的功耗。此外，还对催化剂用量、初始三氯乙酸浓度和溶液 pH 值进行了研究，结果表明它们在三氯乙酸光降解过程中发挥了重要作用。清除剂检测确定，使用 Ag/1BI/1BW 降解三氯乙酸主要是通过超氧自由基和空穴进行的，这与该异质结的载流子转移机制相吻合。TOC 分析表明，Ag/1BI/1BW 的效率为 63%，重复使用测试表明，即使经过三次循环，其性能仍然很高。这项研究为设计用于水处理的高性能异质结提供了新的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.