A facile two-step approach has been developed to fabricate blackberry-like gold nanostructure uniformly depositing on surface of reduced graphene oxide/three-dimensional nickel foam (Au-rGO/3DNF). The hybrid material has been successfully applied as a free-standing biosensor for nonenzymatically detecting H₂O₂ in 0.1 M PBS medium. The results indicated that the sensor could detect H₂O₂ a low detection limit of 1.06 μM, wide linear detection range of 1–296 μM, and high sensitivity of 51.28 μA/(μM ⋅ cm²). In addition, the sensor showed excellent selectivity to H₂O₂ without poisonous influence from coexisting interferents, including ascorbic acid, dopamine, uric acid, urea, and KCl. Furthermore, the sensor also exhibited excellent repeatability, reproducibility and stability towards H₂O₂ detection. This may be due to the formation of a unique 3D nanoarchitecture, in which gold catalysts was effectively deposited on superconductive rGO to produce synergistic effect that efficiently improve electroactive sites, charge transfer ability, and mass diffusion. The achieved results may imply a highly potential method to develop a novel sensor with the enhanced performance for H₂O₂ sensing applications.

已经开发了一种容易的两步法来制造黑莓状的金纳米结构，该结构均匀地沉积在还原的氧化石墨烯/三维镍泡沫（Au-rGO / 3DNF）的表面上。该杂种材料已成功地用作独立的生物传感器，用于非酶法检测0.1 M PBS介质中的H ₂ O ₂。结果表明，该传感器可以检测H ₂ O _2，检测限低至1.06μM，线性检测范围广，介于1–296μM，灵敏度高，达51.28μA/（μM⋅cm ²）。此外，该传感器对H ₂ O ₂表现出出色的选择性不受抗坏血酸，多巴胺，尿酸，尿素和氯化钾等共存干扰物的有毒影响。此外，该传感器还具有出色的重复性，再现性和对H ₂ O ₂检测的稳定性。这可能是由于形成了独特的3D纳米结构，其中金催化剂有效地沉积在超导rGO上，以产生协同效应，从而有效改善电活性位，电荷转移能力和质量扩散。获得的结果可能意味着开发一种具有增强性能的新型传感器的高潜力方法，该传感器适用于H ₂ O ₂传感应用。