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Bismuth Sulfide Strongly Coupled to Functionalized MWNTs Hybrids with Improved Thermoelectric Properties
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2021-07-26 , DOI: 10.1002/aelm.202100468 Yu Liao 1, 2 , Wenting Liu 1 , Weiping Jia 1 , Bo Wang 1 , Ling Chen 1 , Ke Huang 1 , Matthew J. Montgomery 3 , Jun Qian 2 , Song Lv 4 , Lisa D. Pfefferle 3
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2021-07-26 , DOI: 10.1002/aelm.202100468 Yu Liao 1, 2 , Wenting Liu 1 , Weiping Jia 1 , Bo Wang 1 , Ling Chen 1 , Ke Huang 1 , Matthew J. Montgomery 3 , Jun Qian 2 , Song Lv 4 , Lisa D. Pfefferle 3
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The efficiency of thermoelectric (TE) materials depends on an interplay between various material properties, and strategies for co-optimizing these properties will be necessary for implementing these materials in the future. In this work, bismuth sulfide (Bi2S3) and acid treated multiwalled carbon nanotube (f-MWNT) composites are fabricated by wet chemical synthesis at room temperature. Bi2S3 is intimately anchored onto the surface of the f-MWNT to form a coaxial nanostructure. The power factor of the composite is enhanced relative to both the pure Bi2S3 and MWNTs, due to a large enhancement of the electrical conductivity. The enhanced conductivity is attributed to restructuring of the bismuth (Bi) and oxygen (O) bonding environments when Bi2S3 is chemically interfaced with the f-MWNTs, suggestive of the formation of a strongly coupled complex via BiO/BiS bonds. Strong-coupling is further supported by scanning transmission electron microscopy, Raman, and diffuse reflectance spectroscopy, which reveal fast charge-transfer between the Bi2S3 and MWNT when interfaced together. These results support material compositing as a potential strategy for engineering enhanced TE materials.
中文翻译：
硫化铋与具有改进热电性能的功能化多壁碳纳米管杂化物强耦合
热电 (TE) 材料的效率取决于各种材料特性之间的相互作用，未来实施这些材料将需要共同优化这些特性的策略。在这项工作中，硫化铋（Bi 2 S 3）和酸处理的多壁碳纳米管（f-MWNT）复合材料在室温下通过湿化学合成制备。Bi 2 S 3紧密地固定在f-MWNT的表面上以形成同轴纳米结构。复合材料的功率因数相对于纯 Bi 2 S 3和 MWNTs，由于电导率的大幅提高。当 Bi 2 S 3与 f-MWNTs 形成化学界面时，增强的导电性归因于铋 (Bi) 和氧 (O) 键合环境的重构，表明通过 Bi O/Bi 形成强耦合复合物S 债券。扫描透射电子显微镜、拉曼光谱和漫反射光谱进一步支持强耦合，这揭示了 Bi 2 S 3和 MWNT之间的快速电荷转移。这些结果支持材料复合作为工程增强 TE 材料的潜在策略。
更新日期：2021-09-10
中文翻译：
硫化铋与具有改进热电性能的功能化多壁碳纳米管杂化物强耦合
热电 (TE) 材料的效率取决于各种材料特性之间的相互作用，未来实施这些材料将需要共同优化这些特性的策略。在这项工作中，硫化铋（Bi 2 S 3）和酸处理的多壁碳纳米管（f-MWNT）复合材料在室温下通过湿化学合成制备。Bi 2 S 3紧密地固定在f-MWNT的表面上以形成同轴纳米结构。复合材料的功率因数相对于纯 Bi 2 S 3和 MWNTs，由于电导率的大幅提高。当 Bi 2 S 3与 f-MWNTs 形成化学界面时，增强的导电性归因于铋 (Bi) 和氧 (O) 键合环境的重构，表明通过 Bi O/Bi 形成强耦合复合物S 债券。扫描透射电子显微镜、拉曼光谱和漫反射光谱进一步支持强耦合，这揭示了 Bi 2 S 3和 MWNT之间的快速电荷转移。这些结果支持材料复合作为工程增强 TE 材料的潜在策略。
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