Department of Chemistry, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, 603 203, India.
Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia.
Chemosphere. 2022 Nov;307(Pt 4):136003. doi: 10.1016/j.chemosphere.2022.136003. Epub 2022 Aug 17.
Herein, a simple hydrothermal approach was used to make multiplex heteroatoms doped carbon dots from Tinospora cordifolia miers plant extract. Their ability to the catalytic activity of dyes and anti-spurious applications was evaluated. The formation of NBCNDs and source of (T. cordifolia miers) study the optical properties, and functional groups are investigated using UV-Visible spectroscopy and FT-IR techniques. The synthesized NBCNDs structure and elemental compositions were examined via HR-TEM, XRD, and XPS, respectively. According to the HRTEM images, the average particle size of the NBCNDs was around 4.3± 1 nm, with d-spacing of 0.19 nm. The obtained NBCNDs were exposed under 395 nm UV light to emit bluish-green tuneable fluorescence with QY (quantum yield) of 23.7%. The prepared NBCNDs as a potential catalyst for the AYR and CV dye reduction process using freshly prepared NaBH, with determined rate constant values at 0.1220 and 0.1521 min, respectively. Lastly, we constructed a quick response (QR) code security label for anti-spurious applications using stencil techniques. The "confidential info" was encrypted using a QR code digital system, and the decryption was read using a smartphone under 365 nm light irradiation.
在此，我们采用简单的水热法，从三叶鬼针草植物提取物中制备了具有多种杂原子掺杂的碳点。评估了它们对染料催化活性和防伪应用的能力。使用紫外-可见光谱和傅里叶变换红外（FT-IR）技术研究了 NBCNDs 的形成和（三叶鬼针草）的来源，以研究其光学性质和官能团。通过高分辨率透射电子显微镜（HR-TEM）、X 射线衍射（XRD）和 X 射线光电子能谱（XPS）分别研究了合成 NBCNDs 的结构和元素组成。根据高分辨 TEM 图像，NBCNDs 的平均粒径约为 4.3±1nm，具有 0.19nm 的 d 间距。获得的 NBCNDs 在 395nm 紫外光下发射可调谐的蓝绿色荧光，量子产率（QY）为 23.7%。所制备的 NBCNDs 可用作新鲜制备的 NaBH4 还原 AYR 和 CV 染料的潜在催化剂，其速率常数分别为 0.1220 和 0.1521 min。最后，我们使用模板技术为防伪应用构建了快速响应（QR）码安全标签。使用 QR 码数字系统对“机密信息”进行加密，并在 365nm 光照射下使用智能手机读取解密信息。
