Cabona Anna, Toso Stefano, Griesi Andrea, Rizzo Martina, Ferri Michele, Rusch Pascal, Divitini Giorgio, Pérez-Prieto Julia, Galian Raquel E, Kriegel Ilka, Manna Liberato
Nanochemistry Department, Italian Institute of Technology, Via Morego 30, 16163 Genova, Italy.
Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 34, 10129 Turin, Italy.
ACS Mater Lett. 2025 Apr 1;7(5):1707-1716. doi: 10.1021/acsmaterialslett.5c00043. eCollection 2025 May 5.
We report the synthesis of bell-shaped Bi/BiSBr metal/semiconductor heterostructures as a photocatalyst based on nontoxic and Earth-abundant elements. Their unique morphology arises from a multistep growth process, involving (1) the nucleation of BiSBr nanorods, (2) the reduction of a metallic-Bi domain on their surface induced by -didodecylmethylamine, and (3) the heterostructure accretion by a localized reaction at the Bi/BiSBr interface promoted by Ostwald ripening. These heterostructures display remarkable stability in polar solvents, remaining almost unaffected by prolonged exposure to isopropanol and water, and exhibit high photocatalytic efficiency for the degradation of organic dyes (i.e., Rhodamine B and Methylene Blue) under visible-light irradiation, with good recyclability. Additionally, preliminary tests demonstrate CO reduction capabilities, which make these heterostructures promising for both the photocatalytic degradation of pollutants and photoelectrochemical CO conversion. The straightforward synthesis process and the use of nontoxic and Earth-abundant elements offer significant potential for sustainable energy conversion technologies.
我们报道了基于无毒且储量丰富的元素合成钟形Bi/BiSBr金属/半导体异质结构作为光催化剂。它们独特的形貌源于一个多步生长过程，包括：（1）BiSBr纳米棒的成核；（2）由二十二烷基甲胺诱导其表面金属铋域的还原；（3）由奥斯特瓦尔德熟化促进的Bi/BiSBr界面处的局部反应导致的异质结构生长。这些异质结构在极性溶剂中表现出显著的稳定性，长时间暴露于异丙醇和水时几乎不受影响，并且在可见光照射下对有机染料（即罗丹明B和亚甲基蓝）的降解表现出高光催化效率，且具有良好的可回收性。此外，初步测试表明其具有CO还原能力，这使得这些异质结构在污染物的光催化降解和光电化学CO转化方面都具有潜力。这种简单的合成过程以及使用无毒且储量丰富的元素为可持续能源转换技术提供了巨大的潜力。
