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Thermally treated zeolitic imidazolate framework-8 (ZIF-8) for visible light photocatalytic degradation of gaseous formaldehyde
Chemical Science ( IF 7.6 ) Pub Date : 2020-05-21 , DOI: 10.1039/d0sc01397h Tianqi Wang 1, 2 , Yufei Wang 3 , Mingzhe Sun 1, 2 , Aamir Hanif 1, 2 , Hao Wu 1 , Qinfen Gu 4 , Yong Sik Ok 5 , Daniel C W Tsang 6 , Jiyang Li 3 , Jihong Yu 3 , Jin Shang 1, 2
Chemical Science ( IF 7.6 ) Pub Date : 2020-05-21 , DOI: 10.1039/d0sc01397h Tianqi Wang 1, 2 , Yufei Wang 3 , Mingzhe Sun 1, 2 , Aamir Hanif 1, 2 , Hao Wu 1 , Qinfen Gu 4 , Yong Sik Ok 5 , Daniel C W Tsang 6 , Jiyang Li 3 , Jihong Yu 3 , Jin Shang 1, 2
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The development of wide-spectrum responsive photocatalysts for efficient formaldehyde (HCHO) removal is highly desired yet remains a great challenge. Here we successfully converted zeolitic imidazolate framework-8 (ZIF-8), one of the most well-studied metal–organic frameworks (MOFs), from routine ultraviolet-driven to novel broad-spectrum-driven photocatalyst via a facile thermal treatment. The isocyanate groups (–N![[double bond, length as m-dash]](https://www.rsc.org/images/entities/char_e001.gif)
CO) formed in the thermally treated ZIF-8 (ZIF-8-T) is crucial in enabling the superior photocatalytic performance in formaldehyde degradation. Specifically, the best-performing ZIF-8-T sample showed around 2.1 and 9.4 times the HCHO adsorption amount and the solar photocatalytic degradation rate, respectively, of pristine ZIF-8. In addition, ZIF-8-T exhibited visible light (λ ≥ 400 nm) photocatalytic HCHO degradation performance, photo-converting 72% and nearly 100% of 20 ppm and 10 ppm HCHO within 1 hour, respectively. This work affords new insights and knowledge that inspire and inform the design and development of MOF-based photocatalysts with broad-spectrum responses for efficient air purification operations.
中文翻译：
热处理后的咪唑骨架沸石 8 (ZIF-8) 用于可见光光催化降解气态甲醛
开发用于有效去除甲醛（HCHO）的广谱响应光催化剂是非常必要的，但仍然是一个巨大的挑战。在这里，我们通过简单的热处理成功地将沸石咪唑酯骨架-8（ZIF-8）（研究最深入的金属有机骨架（MOF）之一）从常规紫外线驱动光催化剂转变为新型广谱驱动光催化剂。热处理后的 ZIF-8 (ZIF-8-T) 中形成的异氰酸酯基团 (–NCO ) 对于在甲醛降解中实现卓越的光催化性能至关重要。具体来说，性能最好的 ZIF-8-T 样品的 HCHO 吸附量和太阳能光催化降解率分别是原始 ZIF-8 的 2.1 倍和 9.4 倍。此外，ZIF-8-T还表现出可见光（λ≥400 nm）光催化HCHO降解性能，1小时内光转化20 ppm和10 ppm HCHO分别达到72%和接近100%。这项工作提供了新的见解和知识，为基于 MOF 的光催化剂的设计和开发提供了灵感和信息，该催化剂具有广谱响应，可实现高效的空气净化操作。
更新日期：2020-07-08
CO) formed in the thermally treated ZIF-8 (ZIF-8-T) is crucial in enabling the superior photocatalytic performance in formaldehyde degradation. Specifically, the best-performing ZIF-8-T sample showed around 2.1 and 9.4 times the HCHO adsorption amount and the solar photocatalytic degradation rate, respectively, of pristine ZIF-8. In addition, ZIF-8-T exhibited visible light (λ ≥ 400 nm) photocatalytic HCHO degradation performance, photo-converting 72% and nearly 100% of 20 ppm and 10 ppm HCHO within 1 hour, respectively. This work affords new insights and knowledge that inspire and inform the design and development of MOF-based photocatalysts with broad-spectrum responses for efficient air purification operations.
中文翻译：
热处理后的咪唑骨架沸石 8 (ZIF-8) 用于可见光光催化降解气态甲醛
开发用于有效去除甲醛（HCHO）的广谱响应光催化剂是非常必要的，但仍然是一个巨大的挑战。在这里，我们通过简单的热处理成功地将沸石咪唑酯骨架-8（ZIF-8）（研究最深入的金属有机骨架（MOF）之一）从常规紫外线驱动光催化剂转变为新型广谱驱动光催化剂。热处理后的 ZIF-8 (ZIF-8-T) 中形成的异氰酸酯基团 (–N
CO ) 对于在甲醛降解中实现卓越的光催化性能至关重要。具体来说，性能最好的 ZIF-8-T 样品的 HCHO 吸附量和太阳能光催化降解率分别是原始 ZIF-8 的 2.1 倍和 9.4 倍。此外，ZIF-8-T还表现出可见光（λ≥400 nm）光催化HCHO降解性能，1小时内光转化20 ppm和10 ppm HCHO分别达到72%和接近100%。这项工作提供了新的见解和知识，为基于 MOF 的光催化剂的设计和开发提供了灵感和信息，该催化剂具有广谱响应，可实现高效的空气净化操作。
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