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Facet-Engineered Cu2O Microparticles on Graphitic Carbon Nitride Nanosheets as Z-Scheme Heterojunction Photocatalysts for Degradation of Tetracycline
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2024-07-13 , DOI: 10.1021/acsanm.4c02010 Shuo Zhang 1 , Xi Li 1 , Xuyang Bai 1 , Wenxia Zhao 1 , Shaowen Zhao 1 , Chenxi Chang 1 , Shuo Wang 2 , Erhong Duan 1
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2024-07-13 , DOI: 10.1021/acsanm.4c02010 Shuo Zhang 1 , Xi Li 1 , Xuyang Bai 1 , Wenxia Zhao 1 , Shaowen Zhao 1 , Chenxi Chang 1 , Shuo Wang 2 , Erhong Duan 1
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Optimizing the photocatalytic efficiency of semiconductor materials is capable of being achievable by the effective tuning of the interfacial transport efficiency of photogenerated carriers utilizing crystal facet engineering. This study adopted a liquid deposition routine tackle to generate cubic, truncated octahedral, and octahedral Cu2O crystals with various exposed facets. Afterward, a Cu2O/g-C3N4 heterojunction was constructed exploiting defective g-C3N4 as a carrier. By controlling the exposed facet, the work function difference between Cu2O and g-C3N4 was adjusted, resulting in an enhanced built-in electric field and greater photogenerated carrier transit via the Cu2O/g-C3N4 heterojunction interface. The OCN heterojunction, which is composed of g-C3N4 and octahedral Cu2O with a {111} facet, revealed the highest photocatalytic degradation effectiveness of tetracycline (90.8%), which exceeded the values of pure octahedral Cu2O and g-C3N4 by 1.26 and 1.75 times, respectively, as determined by photocatalytic activity experiments. Z-scheme heterojunction among g-C3N4 and octahedral Cu2O has been verified through UPS, XPS, EIS, and transient photocurrent response analysis, along the direction of the built-in electric field recognized between them. In contrast, OCN displayed the highest photocatalytic activity due to its Z-scheme heterojunction, which evidently promoted the separation efficiency of photogenerated carriers. This research proposes an innovative approach for regulating the exposed facet of semiconductors and augmenting the inherent electric field strength of heterojunctions, culminating in the efficient photocatalytic degradation of tetracycline.
中文翻译：
石墨碳氮化物纳米片上的小面工程 Cu2O 微粒作为 Z 型异质结光催化剂用于降解四环素
通过利用晶面工程有效调节光生载流子的界面传输效率，可以实现半导体材料光催化效率的优化。本研究采用液相沉积常规方法来生成立方体、截角八面体和具有各种暴露面的八面体 Cu 2 O 晶体。随后，利用缺陷g-C 3 N 4 构建了Cu 2 O/g-C 3 N 4 异质结。作为载体。通过控制暴露面，调节Cu 2 O和g-C 3 N 4 之间的功函数差异，从而增强内建电场和通过 Cu 2 O/g-C 3 N 4 异质结界面实现更大的光生载流子传输。由g-C 3 N 4 和具有{111}面的八面体Cu 2 O组成的OCN异质结显示出最高的四环素光催化降解效率(90.8%)，经光催化测定，其值分别超过纯八面体 Cu 2 O 和 g-C 3 N 4 值的 1.26 和 1.75 倍活动实验。 g-C 3 N 4 和八面体 Cu 2 O 之间的 Z 型异质结已通过 UPS、XPS、EIS 和瞬态光电流响应分析得到验证，沿着它们之间识别的内置电场的方向。相比之下，OCN由于其Z型异质结而表现出最高的光催化活性，这明显提高了光生载流子的分离效率。 这项研究提出了一种创新方法，用于调节半导体的暴露面并增强异质结的固有电场强度，最终实现四环素的有效光催化降解。
更新日期：2024-07-13
中文翻译：
石墨碳氮化物纳米片上的小面工程 Cu2O 微粒作为 Z 型异质结光催化剂用于降解四环素
通过利用晶面工程有效调节光生载流子的界面传输效率，可以实现半导体材料光催化效率的优化。本研究采用液相沉积常规方法来生成立方体、截角八面体和具有各种暴露面的八面体 Cu 2 O 晶体。随后，利用缺陷g-C 3 N 4 构建了Cu 2 O/g-C 3 N 4 异质结。作为载体。通过控制暴露面，调节Cu 2 O和g-C 3 N 4 之间的功函数差异，从而增强内建电场和通过 Cu 2 O/g-C 3 N 4 异质结界面实现更大的光生载流子传输。由g-C 3 N 4 和具有{111}面的八面体Cu 2 O组成的OCN异质结显示出最高的四环素光催化降解效率(90.8%)，经光催化测定，其值分别超过纯八面体 Cu 2 O 和 g-C 3 N 4 值的 1.26 和 1.75 倍活动实验。 g-C 3 N 4 和八面体 Cu 2 O 之间的 Z 型异质结已通过 UPS、XPS、EIS 和瞬态光电流响应分析得到验证，沿着它们之间识别的内置电场的方向。相比之下，OCN由于其Z型异质结而表现出最高的光催化活性，这明显提高了光生载流子的分离效率。 这项研究提出了一种创新方法，用于调节半导体的暴露面并增强异质结的固有电场强度，最终实现四环素的有效光催化降解。
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