Kanwal Sania, Astam Eiman, Nisa Mehr-Un, Nawaz Rabia, Bahadur Ali, Zidan Ammar, Iqbal Shahid, Saad Muhammad, Mahmood Sajid, Awwad Nasser S, Ibrahium Hala A
Department of Chemistry, School of Natural Sciences (SNS), National University of Science and Technology (NUST), H-12, Islamabad 46000, Pakistan.
Nanomaterials Research Center, Department of Chemistry, College of Science, Mathematics, and Technology, Wenzhou-Kean University, Wenzhou 325060, Zhejiang Province, China; Dorothy and George Hennings College of Science, Mathematics and Technology, Kean University, 1000 Morris Ave, Union, NJ 07083, USA.
Spectrochim Acta A Mol Biomol Spectrosc. 2025 Jan 15;325:125131. doi: 10.1016/j.saa.2024.125131. Epub 2024 Sep 16.
A unique heterojunction combining BiMoO/CdS with Ni nanoparticles has been synthesized using the solvothermal method. This novel heterojunction, composed of NSs and NRs, was characterized using XRD, Raman, SEM, TEM, STEM, EDX, XPS, UV, and PL techniques. The synthesized heterojunctions exhibited substantial photocatalytic activity towards the degradation of 2-aminophenol, significantly outperforming their single-metal counterparts. The photocatalytic efficiency of the tripartite sheet and rod composite was about 26 and 16 times higher than that of the separate CdS sheets and rods for the reduction of 2-aminophenol. The primary reactive species for photocatalytic degradation were identified as the holes of BiMoO and the electrons of CdS. The Mott Schottky barrier established between CdS and Ni nanoparticles prevents the transfer of electrons from Ni nanoparticles back to CdS, allowing Ni nanoparticles to efficiently capture electrons and prevent any backward flow. This, in turn, results in enhanced photocatalytic activity. The improved photocatalytic capability is ascribed to the S-scheme heterojunction between BiMoO/CdS, which promotes better separation of electrons and holes. The Mott Schottky barrier between CdS and Ni also ensures a more abundant electron supply for chemical reactions, minimizing potential losses. The 2D-2D nanostructure morphology of BiMoO and CdS extends the surface area, enhancing light utilization and providing more active reaction sites. The synthesized heterojunction demonstrated impressive stability over three cycles, highlighting its potential for recycling and repeated use.
采用溶剂热法合成了一种独特的将BiMoO/CdS与镍纳米颗粒相结合的异质结。这种由纳米片（NSs）和纳米棒（NRs）组成的新型异质结，通过X射线衍射（XRD）、拉曼光谱、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、扫描透射电子显微镜（STEM）、能谱仪（EDX）、X射线光电子能谱（XPS）、紫外可见光谱（UV）和光致发光光谱（PL）技术进行了表征。合成的异质结对2-氨基酚的降解表现出显著的光催化活性，明显优于其单金属对应物。三方片状和棒状复合材料对2-氨基酚还原的光催化效率分别比单独的CdS片和棒高约26倍和16倍。光催化降解的主要活性物种被确定为BiMoO的空穴和CdS的电子。CdS与镍纳米颗粒之间建立的莫特-肖特基势垒可防止电子从镍纳米颗粒回流到CdS，使镍纳米颗粒能够有效地捕获电子并防止任何反向流动。这反过来又导致光催化活性增强。光催化能力的提高归因于BiMoO/CdS之间的S型异质结，它促进了电子和空穴的更好分离。CdS与镍之间的莫特-肖特基势垒还确保了化学反应有更丰富的电子供应，将潜在损失降至最低。BiMoO和CdS的二维-二维纳米结构形态扩大了表面积，提高了光利用率并提供了更多的活性反应位点。合成的异质结在三个循环中表现出令人印象深刻的稳定性，突出了其回收和重复使用的潜力。
