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Fabrication of MoS2/BiOBr heterojunctions on carbon fibers as a weaveable photocatalyst for tetracycline hydrochloride degradation and Cr(VI) reduction under visible light
Environmental Science: Nano ( IF 5.8 ) Pub Date : 2020-07-13 , DOI: 10.1039/d0en00551g Zhun Shi 1, 2, 3, 4, 5 , Yan Zhang 5, 6, 7, 8 , Gumila Duoerkun 5, 6, 7, 8 , Wei Cao 5, 6, 7, 8 , Ting Liu 5, 6, 7, 8 , Lisha Zhang 5, 6, 7, 8 , Jianshe Liu 5, 6, 7, 8 , Maoquan Li 1, 2, 3, 4, 5 , Zhigang Chen 1, 2, 3, 4, 5
Environmental Science: Nano ( IF 5.8 ) Pub Date : 2020-07-13 , DOI: 10.1039/d0en00551g Zhun Shi 1, 2, 3, 4, 5 , Yan Zhang 5, 6, 7, 8 , Gumila Duoerkun 5, 6, 7, 8 , Wei Cao 5, 6, 7, 8 , Ting Liu 5, 6, 7, 8 , Lisha Zhang 5, 6, 7, 8 , Jianshe Liu 5, 6, 7, 8 , Maoquan Li 1, 2, 3, 4, 5 , Zhigang Chen 1, 2, 3, 4, 5
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The photocatalytic removal of organic pollutants and heavy metals in water has become a hot topic, and its prerequisite is to obtain efficient and recyclable visible-light-driven (VLD) photocatalysts. To solve this issue, we constructed MoS2/BiOBr heterojunctions on carbon fibers (CFs) as a flexible and weaveable VLD photocatalyst. Firstly, MoS2 nanosheets (thickness: ∼5 nm, diameter: 200–400 nm) were anchored on CFs. Subsequently, a layer of BiOBr lamellae (thickness: ∼25 nm, diameter: 300–600 nm) was grown. CFs/MoS2/BiOBr bundles were weaved into cloth, and the cloth could photocatalytically eliminate 92.4% tetracycline hydrochloride (TCH) or 90.7% hexavalent chromium (Cr6+) in 120 min, higher than CFs/MoS2 cloth (43.2%/43.6%) and CFs/BiOBr cloth (51.8%/33.5%). Photogenerated holes and superoxide radicals were found to be the main active species. In particular, a possible photodegradation pathway of TCH was proposed according to the intermediates. Thus, CFs/MoS2/BiOBr can act as a weaveable and recyclable photocatalyst for potential applications in treating wastewater.
中文翻译：
在碳纤维上制备MoS2 / BiOBr异质结作为可编织的光催化剂，用于可见光下盐酸四环素的降解和Cr（VI）的还原
光催化去除水中的有机污染物和重金属已成为热门话题，其前提是要获得高效且可回收的可见光驱动（VLD）光催化剂。为解决此问题，我们在碳纤维（CFs）上构建了MoS 2 / BiOBr异质结，作为一种可编织的VLD光催化剂。首先，将MoS 2纳米片（厚度：〜5 nm，直径：200-400 nm）固定在CF上。随后，生长了一层BiOBr薄片（厚度：〜25 nm，直径：300-600 nm）。将CFs / MoS 2 / BiOBr束编织成布，布在120分钟内可光催化去除92.4％的四环素盐酸盐（TCH）或90.7％的六价铬（Cr 6+），高于CFs / MoS 2布（43.2％/ 43.6％）和CFs / BiOBr布（51.8％/ 33.5％）。发现光生空穴和超氧自由基是主要的活性物种。特别地，根据中间体提出了可能的TCH光降解途径。因此，CFs / MoS 2 / BiOBr可以作为可编织和可回收的光催化剂，用于废水的潜在应用。
更新日期：2020-09-18
中文翻译：
在碳纤维上制备MoS2 / BiOBr异质结作为可编织的光催化剂，用于可见光下盐酸四环素的降解和Cr（VI）的还原
光催化去除水中的有机污染物和重金属已成为热门话题，其前提是要获得高效且可回收的可见光驱动（VLD）光催化剂。为解决此问题，我们在碳纤维（CFs）上构建了MoS 2 / BiOBr异质结，作为一种可编织的VLD光催化剂。首先，将MoS 2纳米片（厚度：〜5 nm，直径：200-400 nm）固定在CF上。随后，生长了一层BiOBr薄片（厚度：〜25 nm，直径：300-600 nm）。将CFs / MoS 2 / BiOBr束编织成布，布在120分钟内可光催化去除92.4％的四环素盐酸盐（TCH）或90.7％的六价铬（Cr 6+），高于CFs / MoS 2布（43.2％/ 43.6％）和CFs / BiOBr布（51.8％/ 33.5％）。发现光生空穴和超氧自由基是主要的活性物种。特别地，根据中间体提出了可能的TCH光降解途径。因此，CFs / MoS 2 / BiOBr可以作为可编织和可回收的光催化剂，用于废水的潜在应用。
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