Pandit Manzoor Ahmad, Hemanth Kumar Dasari Sai, Varkolu Mohan, Muralidharan Krishnamurthi
Materials Genome Institute, Shanghai University Shanghai 200444 China.
School of Chemistry, University of Hyderabad Hyderabad 500046 Telangana India
Nanoscale Adv. 2024 Dec 20;7(4):1143-1153. doi: 10.1039/d4na00871e. eCollection 2025 Feb 11.
Addressing the pressing need to develop affordable and efficient catalysts is essential. In this study, we successfully synthesized CuBiS nanostructures with a modified morphology using three different nitrogen bases: DBN, DBU, and DABCO a hydrothermal technique. These nanostructures were used for the electrochemical detection of organic nitro groups, a previously unexplored application for this material. We conducted a thorough characterization of the CuBiS nanostructures using various analytical and spectroscopic methods, including PXRD, FESEM, TEM, XPS, UV-vis, and BET, ensuring the reliability of our results. We then investigated their performance in the electrochemical detection of 4-dinitrophenol (4-NP) and 2,4-dinitrophenol (2,4-DNP) using a modified glassy carbon (GC) electrode. The CuBiS material produced using DABCO exhibited better sensitivity towards 4-NP detection, with a low limit of detection (LOD) of 0.50 μM compared to the ones synthesized using DBN and DBU. Furthermore, the synthesized materials demonstrated the ability to detect their structural analogue, 2,4-DNP. The distinctive hierarchical nanostructures attained in CuBiS highlight the benefits of developing such catalysts and the impact of nitrogenous bases in defining the morphology of the materials with enhanced catalytic activities.
开发经济高效的催化剂以满足迫切需求至关重要。在本研究中，我们使用水热技术，通过三种不同的氮碱：1,5 - 二氮杂双环[4.3.0]壬 - 5 - 烯（DBN）、1,8 - 二氮杂双环[5.4.0]十一碳 - 7 - 烯（DBU）和1,4 - 二氮杂双环[2.2.2]辛烷（DABCO）成功合成了具有改性形态的CuBiS纳米结构。这些纳米结构被用于有机硝基的电化学检测，这是该材料此前未被探索的应用。我们使用各种分析和光谱方法，包括粉末X射线衍射（PXRD）、场发射扫描电子显微镜（FESEM）、透射电子显微镜（TEM）、X射线光电子能谱（XPS）、紫外可见光谱（UV - vis）和比表面积分析（BET），对CuBiS纳米结构进行了全面表征，确保了我们结果的可靠性。然后，我们使用改性玻碳（GC）电极研究了它们在4 - 二硝基苯酚（4 - NP）和2,4 - 二硝基苯酚（2,4 - DNP）电化学检测中的性能。与使用DBN和DBU合成的材料相比，使用DABCO制备的CuBiS材料对4 - NP检测表现出更好的灵敏度，检测限低至0.50 μM。此外，合成材料还展示了检测其结构类似物2,4 - DNP的能力。在CuBiS中获得的独特分级纳米结构突出了开发此类催化剂的益处以及含氮碱在定义具有增强催化活性的材料形态方面的影响。
