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Black phosphorus quantum dot/g-C3N4 composites for enhanced CO2 photoreduction to CO

黑磷量子点/g-C3N4复合光催化剂的制备及其增强的光催化还原CO2到CO性能

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Abstract

The development of low cost, metal free semiconductor photocatalysts for CO2 reduction to fuels and valuable chemical feedstocks is a practically imperative for reducing anthropogenic CO2 emissions. In this work, black phosphorus quantum dots (BPQDs) were successfully dispersed on a graphitic carbon nitride (g-C3N4) support via a simple electrostatic attraction approach, and the activities of BP@g-C3N4 composites were evaluated for photocatalytic CO2 reduction. The BP@g-C3N4 composites displayed improved carrier separation efficiency and higher activities for photocatalytic CO2 reduction to CO (6.54 μmol g−1 h−1 at the optimum BPQDs loading of 1 wt%) compared with pure g-C3N4 (2.65 μmol g−1 h−1). This work thus identifies a novel approach towards metal free photocatalysts for CO2 photoreduction.

摘要

开发还原二氧化碳生成燃料和有价值化学品的低成本、非金属半导体光催化剂, 是减少二氧化碳浓度的一种有效方案. 本工作通 过简单的静电吸引方法成功地将黑磷量子点(BPQDs)分散在石墨相氮化碳(g-C3N4)载体上, 成功制备了BP@g-C3N4复合材料, 并对其在紫 外-可见光激发下光催化还原CO2的性能进行了研究. 电化学表征, 瞬态吸收光谱和荧光光谱数据表明BPQDs的负载提高了g-C3N4的载流 子分离效率. 在氙灯的照射下, 与g-C3N4(CO的生成速率为2.1 μmol g−1 h−1)相比, BP@g-C3N4复合材料光催化还原CO2活性显著提高(当 BPQDs的负载量为1 wt%时, CO的生成速率为6.54 μmol g−1 h−1). 本工作发展了一种新型的可还原CO2的非金属基光催化剂.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (51502146, U1404506, 21671113, 51772305, 51572270, and U1662118), the International Partnership Program of Chinese Academy of Sciences (GJHZ1819), the Royal Society-Newton Advanced Fellowship (NA170422) and supported by Open Fund (PEBM201702) of Key Laboratory for Photonic and Electric Bandgap Materials, Ministry of Education (Harbin Normal University).

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Authors and Affiliations

  1. Engineering Technology Research Center of Henan Province for Solar Catalysis, College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, 473061, China

    Chunqiu Han  (韩春秋), Jue Li  (李珏), Zhaoyu Ma  (马照宇), Haiquan Xie  (谢海泉) & Liqun Ye  (叶立群)

  2. Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China

    Tierui Zhang  (张铁锐)

  3. Key Laboratory for Photonic and Electric Bandgap Materials, Ministry of Education, Harbin Normal University, Harbin, 150025, China

    Liqun Ye  (叶立群)

  4. School of Chemical Sciences, The University of Auckland, Auckland, 1142, New Zealand

    Geoffrey I.N. Waterhouse

  5. University of Chinese Academy of Sciences, Beijing, 100049, China

    Tierui Zhang  (张铁锐)

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  1. Chunqiu Han  (韩春秋)
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  2. Jue Li  (李珏)
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  3. Zhaoyu Ma  (马照宇)
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  4. Haiquan Xie  (谢海泉)
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  5. Geoffrey I.N. Waterhouse
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  6. Liqun Ye  (叶立群)
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  7. Tierui Zhang  (张铁锐)
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Corresponding authors

Correspondence to Liqun Ye  (叶立群) or Tierui Zhang  (张铁锐).

Additional information

Chunqiu Han obtained her BS degree from Nanyang Normal University in 2016. She then moved to the College of Chemistry and Pharmaceutical Engineering in Nanyang Normal University for her Master degree. She is interested in developing new photocatalyst for CO2 reduction.

Liqun Ye obtained his BSc degree from Qiqihar University in 2008, and his PhD degree from Wuhan University in 2013. At present, he works in Nanyang Normal University. His current research concentrates on the synthesis of 2D photofunctional materials and their applications in the fields of environment remediation and solar fuel production.

Tierui Zhang is a full Professor in the Technical Institute of Physics and Chemistry, CAS. He received his BSc in chemistry in 1998, and PhD in organic chemistry in 2003 from Jilin University in China. After that, he did postdoctoral study in Max Planck Institute of Colloids and Interfaces, University of Alberta, University of Arkansas and University of California-Riverside, respectively. His research activity focuses on catalyst nanomaterials for clean and efficient production and utilization of hydrogen.

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Han, C., Li, J., Ma, Z. et al. Black phosphorus quantum dot/g-C3N4 composites for enhanced CO2 photoreduction to CO. Sci. China Mater. 61, 1159–1166 (2018). https://doi.org/10.1007/s40843-018-9245-y

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