Wang Huanchun, Ding Junping, Xu Haomin, Qiao Lina, Wang Xuanjun, Lin Yuanhua
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
Xi'an Research Inst. of High-Tech, Xi'an 710025, China.
Nanomaterials (Basel). 2019 Apr 3;9(4):540. doi: 10.3390/nano9040540.
Cuprous based chalcogenides have attracted intensive research interest due to the potential applications in solar energy conversion. However, typical fabrications of these compounds are often carried out under severe conditions, such as inert gas protection, high vacuum, and/or extreme high temperature. Here we reported a one-pot process for cuprous based chalcogenides synthesis in aqueous solution. A strategy for BiCuSO nanosheets fabrication without toxic chemicals or rigorous reagents at pretty low temperatures under an ambient atmosphere was established, with the practicality of morphology controlling and the compatibility of multifarious precursors. Platelike BiCuSO with a thickness range from several to hundreds nanometers are fabricated by adjusting the alkali concentration, reaction time, and temperature. The positive effect of alkali hydroxide concentration is proposed cautiously based on the experimental results. The photocatalytic activities of BiCuSO nanosheet under UV, visible, and near-infrared irradiation were also investigated. BiCuSO obtained at room temperature with a thickness of 4.5 nm showed the most impressive efficiency to decompose organic contaminants. Our research presented a new way for cuprous sulfides fabrication, and might open up a new vista for large-scale synthesis of cuprous based materials as promising broadband spectrum light-absorbing materials.
基于铜的硫族化合物由于在太阳能转换中的潜在应用而引起了广泛的研究兴趣。然而，这些化合物的典型制备通常在苛刻的条件下进行，如惰性气体保护、高真空和/或极高温度。在此，我们报道了一种在水溶液中合成基于铜的硫族化合物的一锅法。建立了一种在环境气氛下、在相当低的温度下无需有毒化学品或严格试剂制备BiCuSO纳米片的策略，具有形态控制的实用性和多种前驱体的兼容性。通过调节碱浓度、反应时间和温度，制备出厚度在几纳米到几百纳米范围内的片状BiCuSO。基于实验结果，谨慎地提出了氢氧化碱浓度的积极作用。还研究了BiCuSO纳米片在紫外光、可见光和近红外光照射下的光催化活性。在室温下获得的厚度为4.5 nm的BiCuSO对分解有机污染物显示出最显著的效率。我们的研究为硫化亚铜的制备提供了一种新方法，并可能为大规模合成作为有前途的宽带光谱光吸收材料的基于铜的材料开辟新的前景。
