Plasmonic Pd-Sb nanosheets for photothermal CH4 conversion to HCHO and therapy

IF 11.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Science Advances Pub Date : 2024-09-04 DOI:10.1126/sciadv.ado9664

Mengjun Wang, Jun Jia, Zhaodong Meng, Jing Xia, Xinyan Hu, Fei Xue, Huiping Peng, Xiangmin Meng, Jun Yi, Xiaolan Chen, Jun Li, Yuzheng Guo, Yong Xu, Xiaoqing Huang

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Abstract

Photothermal catalysis effectively increases catalytic activity by using the photothermal effect of metal nanomaterials; however, the combination of strong light absorption and high catalytic performance remains a challenge. Here, we demonstrate hexagonal ~5-nanometer-thick palladium antimony (chemical formula as Pd₈Sb₃) nanosheets (NSs) that exhibit strong light absorption within full spectral and localized surface plasmon resonance (LSPR) effects in the visible region. Such LSPR features lead to strong photothermal effects, and Pd₈Sb₃ NSs aqueous dispersion enables enhanced photothermal methane (CH₄) conversion to formaldehyde (HCHO) under full-spectrum light irradiation at 1.7 watts per square centimeter, leading to selectivity of ~98.7%, productivity of ~665 millimoles per gram of catalyst, ~700 times higher than that of Pd NSs. Mechanism investigations suggest that different radicals were generated on Pd₈Sb₃ (·OH) and Pd NSs (·O₂⁻), where Pd₈Sb₃ NSs displays stronger adsorption strength to CH₄ and facilitates CH₄ oxidation to HCHO. Besides, the strong light absorption ability of Pd₈Sb₃ NSs enables photothermal therapy for breast cancer.

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用于光热将 CH4 转化为 HCHO 并进行治疗的等离子 Pd-Sb 纳米片。

光热催化利用金属纳米材料的光热效应有效地提高了催化活性；然而，如何将强光吸收和高催化性能结合起来仍然是一个挑战。在这里，我们展示了六角形约 5 纳米厚的钯锑纳米片（化学式为 Pd8Sb3），这种纳米片在可见光区域的全光谱和局部表面等离子体共振（LSPR）效应范围内表现出很强的光吸收能力。在 1.7 瓦/平方厘米的全光谱光照射下，Pd8Sb3 NSs 的水分散体能够增强甲烷（CH4）向甲醛（HCHO）的光热转化，使选择性达到约 98.7%，每克催化剂的生产率达到约 665 毫摩尔，是 Pd NSs 的约 700 倍。机理研究表明，Pd8Sb3（-OH）和 Pd NSs（-O2-）上产生了不同的自由基，其中 Pd8Sb3 NSs 对 CH4 具有更强的吸附力，可促进 CH4 氧化为 HCHO。此外，Pd8Sb3 NSs 具有很强的光吸收能力，可用于乳腺癌的光热治疗。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Science Advances 综合性期刊-综合性期刊

CiteScore

21.40

自引率

1.50%

发文量

1937

审稿时长

29 weeks

期刊介绍： Science Advances, an open-access journal by AAAS, publishes impactful research in diverse scientific areas. It aims for fair, fast, and expert peer review, providing freely accessible research to readers. Led by distinguished scientists, the journal supports AAAS's mission by extending Science magazine's capacity to identify and promote significant advances. Evolving digital publishing technologies play a crucial role in advancing AAAS's global mission for science communication and benefitting humankind.