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Novel g-C3N4/C/Fe2O3 Composite for Efficient Photocatalytic Reduction of Aqueous Cr(VI) under Light Irradiation
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-09-14 , DOI: 10.1021/acs.iecr.1c02411 Liming Zhao 1, 2 , Lijun Guo 1, 2 , Yuling Tang 1, 2 , Jianfei Zhou 1, 2 , Bi Shi 1, 2
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-09-14 , DOI: 10.1021/acs.iecr.1c02411 Liming Zhao 1, 2 , Lijun Guo 1, 2 , Yuling Tang 1, 2 , Jianfei Zhou 1, 2 , Bi Shi 1, 2
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Research on the rational design of photocatalysts for efficient hexavalent chromium (Cr(VI)) reduction from Cr(VI)-containing wastewater has attracted widespread attention. In this paper, a novel g-C3N4/C/Fe2O3 photocatalyst was successfully synthesized by anchoring g-C3N4 nanosheets onto C/Fe2O3 that was prepared using collagen fiber as the biochar resource following the Fe tanning mechanism to reduce Cr(VI) under artificial solar irradiation. Under the same conditions, the as-prepared g-C3N4/C/Fe2O3 photocatalyst exhibited higher Cr(VI) reduction efficiency than g-C3N4, and the Cr(VI) reduction efficiency increased as Fe content in the g-C3N4/C/Fe2O3 photocatalyst increased. The enhanced photocatalytic performance was primarily ascribed to the formation of an indirect Z-scheme heterojunction between C/Fe2O3 and g-C3N4, which improved the separation efficiency of the photogenerated charge carrier. Furthermore, radical trapping indicated that photoinduced electrons (e–) were the main factor for Cr(VI) reduction. This work provides guidance for high value-added utilization of collagen fiber in constructing efficient light-driven photocatalysts and practical Cr(VI) removal from wastewater.
中文翻译：
新型 g-C3N4/C/Fe2O3 复合材料可在光照射下有效光催化还原水性 Cr(VI)
从含Cr(VI)废水中高效还原六价铬(Cr(VI))的光催化剂的合理设计研究引起了广泛关注。在本文中，通过将gC 3 N 4纳米片锚定在以胶原纤维为生物炭资源制备的C/Fe 2 O 3 上，遵循Fe 鞣制机制，成功合成了一种新型gC 3 N 4 /C/Fe 2 O 3光催化剂。在人工太阳辐射下减少 Cr(VI)。在相同条件下，所制备的 gC 3 N 4 /C/Fe 2 O 3光催化剂表现出比gC 3 N 4更高的Cr(VI)还原效率，并且Cr(VI)还原效率随着gC 3 N 4 /C/Fe 2 O 3光催化剂中Fe含量的增加而增加。增强的光催化性能主要归因于在 C/Fe 2 O 3和 gC 3 N 4之间形成间接 Z 型异质结，提高了光生载流子的分离效率。此外，自由基捕获表明光生电子（e -) 是 Cr(VI) 减少的主要因素。这项工作为胶原纤维的高附加值利用在构建高效的光驱动光催化剂和从废水中去除六价铬提供了指导。
更新日期：2021-09-22
中文翻译：
新型 g-C3N4/C/Fe2O3 复合材料可在光照射下有效光催化还原水性 Cr(VI)
从含Cr(VI)废水中高效还原六价铬(Cr(VI))的光催化剂的合理设计研究引起了广泛关注。在本文中，通过将gC 3 N 4纳米片锚定在以胶原纤维为生物炭资源制备的C/Fe 2 O 3 上，遵循Fe 鞣制机制，成功合成了一种新型gC 3 N 4 /C/Fe 2 O 3光催化剂。在人工太阳辐射下减少 Cr(VI)。在相同条件下，所制备的 gC 3 N 4 /C/Fe 2 O 3光催化剂表现出比gC 3 N 4更高的Cr(VI)还原效率，并且Cr(VI)还原效率随着gC 3 N 4 /C/Fe 2 O 3光催化剂中Fe含量的增加而增加。增强的光催化性能主要归因于在 C/Fe 2 O 3和 gC 3 N 4之间形成间接 Z 型异质结，提高了光生载流子的分离效率。此外，自由基捕获表明光生电子（e -) 是 Cr(VI) 减少的主要因素。这项工作为胶原纤维的高附加值利用在构建高效的光驱动光催化剂和从废水中去除六价铬提供了指导。
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