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首页> 外文期刊>Materials science & engineering >2D Graphene oxide (GO) doped p-n type BiOI/Bi_2WO_6 as a novel composite for photodegradation of bisphenol A (BPA) in aqueous solutions under UV- vis irradiation
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2D Graphene oxide (GO) doped p-n type BiOI/Bi_2WO_6 as a novel composite for photodegradation of bisphenol A (BPA) in aqueous solutions under UV- vis irradiation

机译：二维氧化石墨烯（GO）掺杂的p-n型BiOI / Bi_2WO_6作为一种新型复合材料，可在UV-vis照射下光降解水溶液中的双酚A（BPA）

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摘要

Bisphenol A (BPA) is a refractory pollutant presents in water body that possesses serious threats to living organisms. To deal with it, we investigate and evaluate the effectiveness of GO@BiOI/Bi2WO6 composite as a novel photocatalyst for BPA removal from aqueous solutions under UV-vis irradiation. To enhance its removal for BPA, the surface of BiOI/Bi2WO6 is modified with graphene oxide (GO). This composite is named as 'GO@BiOI/Bi2WO6'. Changes in its physico-chemical properties after surface modification with GO are characterized by XRD, FTIR, FESEM-EDS, XPS, PL, and BET methods. Optimized conditions of BPA degradation by the composite are determined under identical conditions. Photodegradation pathways of BPA and its removal mechanisms by the same composite are presented. It is obvious that the GO@BiOI/Bi2WO6 has demonstrated its potential as a promising photocatalyst for BPA removal under UV-vis irradiation. About 81% of BPA removal is attained by the GO@BiOI/Bi2WO6 under optimized conditions (10 mg/L of BPA, 0.5 g/L of dose, pH 7 and 5 h of reaction time). The oxidation by-products of BPA degradation include p-hydroquinone or 4-(1-hydroxy-1-methyl-ethyl)-phenol. In spite of its performance, the treated effluents are still unable to meet the maximum discharge limit of < 1 mg/L set by national legislation. Therefore, subsequent biological processes are essential to maximize its biodegradation in the wastewater samples before their discharge into waterbody.
机译：双酚A（BPA）是存在于水体中的难降解污染物，对生物体具有严重威胁。为了解决这个问题，我们研究和评估了GO @ BiOI / Bi2WO6复合材料作为新型光催化剂在UV-vis照射下从水溶液中去除BPA的有效性。为了增强对BPA的去除效果，BiOI / Bi2WO6的表面用氧化石墨烯（GO）进行了改性。该复合材料名为“ GO @ BiOI / Bi2WO6”。用XRD，FTIR，FESEM-EDS，XPS，PL和BET方法表征了用GO表面改性后其理化性质的变化。在相同条件下确定复合材料降解BPA的最佳条件。提出了双酚A的光降解途径及其去除机理。显然，GO @ BiOI / Bi2WO6已显示出其作为在紫外线可见光下去除BPA的有希望的光催化剂的潜力。 GO @ BiOI / Bi2WO6在最佳条件下（10 mg / L BPA，0.5 g / L剂量，pH 7和5 h反应时间）可通过GO @ BiOI / Bi2WO6去除约81％的BPA。 BPA降解的氧化副产物包括对氢醌或4-（1-羟基-1-甲基-乙基）-苯酚。尽管其性能良好，但处理后的废水仍无法达到国家法规设定的最大排放限值<1 mg / L。因此，后续的生物过程对于使废水样品排入水体之前最大程度地生物降解至关重要。

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  • 来源
    《Materials science & engineering》 |2020年第3期|110420.1-110420.9|共9页
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  • 作者单位

    Xiamen Univ Key Lab Coastal & Wetland Ecosyst Minist Educ Coll Ecol & Environm Xiamen 361102 Fujian Peoples R China;

    Xiamen Univ Key Lab Coastal & Wetland Ecosyst Minist Educ Coll Ecol & Environm Xiamen 361102 Fujian Peoples R China|Xiamen Univ Malaysia China ASEAN Coll Marine Sci Sepang 43900 Selangor Darul Malaysia;

    Hokkaido Univ Fac Environm Earth Sci Sapporo Hokkaido 0600810 Japan;

    Univ Teknol Malaysia Sch Chem & Energy Engn Adv Membrane Technol Res Ctr AMTEC Skudai 81310 Johor Malaysia;

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  • 正文语种 eng
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  • 关键词

    BPA degradation; Carbon-based materials; Heterojunction; Hybrid photocatalysts;

    机译：双酚A降解;碳基材料;异质结;杂化光催化剂;

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