Ginkgo leaves extract-assisted synthesis of ZnO/CuO nanocrystals for efficient UV-induced photodegradation of organic dyes and antibacterial activity

Acacia nilotica Pods’ Extract Assisted-Hydrothermal Synthesis and Characterization of ZnO-CuO Nanocomposites

“…However, the intensity of peaks corresponding to wurtzite zinc oxide is decreasing gradually in the samples ZC25, ZC50, and ZC75 with decreasing the amount of zinc precursor in the starting materials. The same can be observed in an opposite way for the monoclinic tenorite and the intensity of copper oxide peaks increases gradually in samples ZC25, ZC50, ZC75 with an increasing copper precursor in the initial compositions ( Table 1 ) [ 2 , 26 , 48 ]. There are no peaks detected by XRD for Zn metal, Cu metal, or any other compounds which indicates the high purity of formed ZnO-CuO nanocomposites.…”

“…In sample ZC100, which is pristine copper oxide, the less deep peak below 600 cm −1 indicates the presence of Cu-O. Going from sample ZC75, ZC50 to ZC25, the depth of this band increases as the content of copper oxide decreases and the content of zinc oxide increases [ 26 ]. The FTIR results confirm the formation of pristine zinc oxide, zinc oxide-copper oxide nanocomposites and pristine copper oxide in samples ZC0, ZC25, ZC50, ZC75, and ZC100, respectively.…”

“…Figure 2 c shows the FTIR spectrum of the sample after the hydrothermal treatment and drying which results in the disappearance of the peaks related to the extract. Figure 2 d shows the FTIR of the sample after calcination at 300 °C for 2 h, which results in the sharpness of peaks related to M-O bonds between 400–600 cm −1 [ 26 ].…”

“…Various methods are applied to prepare metal oxide nanoparticles and nanocomposites as simple precipitation [ 23 ], electrochemical method [ 24 ], mechanical milling [ 1 ], sol-gel method [ 2 , 25 ], biocombustion [ 26 ], co-precipitation [ 27 ], green synthesis [ 28 , 29 ], sonochemical synthesis [ 30 ] and hydrothermal method [ 31 , 32 ]. The hydrothermal method has many advantages as being simple, low-cost, and low-temperature.…”

Green Synthesis of a CuO–ZnO Nanocomposite for Efficient Photodegradation of Methylene Blue and Reduction of 4-Nitrophenol

“…CuO–ZnO NCs synthesis was reported using extracts of plants like Clerodendrum infortunatum , 44 Melissa officinalis L., 45 Vaccinium arctostaphylos L., 46 and Ginkgo biloba . 47 This study involves preparing CuO–ZnO NCs using GH extract. To our knowledge, there has not yet been a publication on CuO–ZnO NC catalyst synthesized using GH.…”