J. Appl. Cryst.の発刊に際して

https://www.pnas.org/content/pnas/90/5/1635.full.pdf

Supramolecular chemistry.

Zinc oxide nanoparticles (ZnO NPs) are one of the prominent metal oxide nanoparticles with significant applications in many industries and research institutes. Various methods of synthesis have been adopted in the production of ZnO NPs so as to meet its high demand. The environmental implications and economic challenges attached to most of the means of ZnO NPs synthesis have resulted in the quest for other alternatives with environmental and economic benefits. Interestingly, the biological method of synthesis using plant sources have been found appropriate for the production of ZnO NPs dues to its numerous health, environmental, economic, and medicinal benefits. The distinctive features of ZnO NPs synthesized using plant extracts enhanced its application in agriculture for the production of fertilizers, pesticides, and fumigants. In the field of medicine and pharmacy, phytosynthesized ZnO NPs have gained remarkable usage in the production of disinfectant, antifungal, anticancer, antioxidant, anti-inflammatory and antidiabetics agents. Despite the enlisted benefits of biosynthesized ZnO NPs, the difficulties associated with the elucidation of formation mechanism and reactions still remain unraveled. This review described the summary of the recent advances in the synthesis, mechanism routes, characterization techniques, and applications of biosynthesized ZnO NPS in agriculture, medicine, and textile industries.

A Review on Green Synthesis of Zinc Oxide Nanoparticles Using Plant Extracts and Its Biomedical Applications

In the present manuscript, thin films of Zinc Oxide (ZnO) have been deposited on a FTO substrate using a simple successive ionic layer adsorption and reaction (SILAR) and chemical bath deposition (CBD) method. Cadmium Sulphide (CdS) nanoparticles are sensitized over ZnO thin films using SILAR method. The synthesized nanostructured CdS/ZnO heterojunction thin films was characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), High resolution transmission electron microscopy (HR-TEM), X-ray photoelectron spectroscopy (XPS), UV–Vis spectroscopy and Raman spectroscopy techniques. The band gap of CdS nanoparticles over ZnO nanostructure was found to be about 3.20 eV. The photocatalytic activities of the deposited CdS/ZnO thin films were evaluated by the degradation of methylene blue (MB) in an aqueous solution under sun light irradiation.

Nanostructure CdS/ZnO heterojunction configuration for photocatalytic degradation of Methylene blue

Low temperature biosynthesis of crystalline zinc oxide nanoparticles from Musa acuminata peel extract for visible-light degradation of methylene blue

The precipitation–decomposition method was used to prepare the photocatalyst (Sm–ZnO–Ag). Synthesized catalyst was characterized by X-ray diffraction, field emission scanning electron microscope images, and optical spectroscopy. The activity of photocatalyst of Sm–ZnO–Ag was checked for the photodegradation of thiazin-type methylene blue (MB) dye in aqueous solution using light emitting diodes/solar illumination. Sm–ZnO–Ag is found to be excellent competent than Ag–ZnO, Sm–ZnO and ZnO nanoparticles. The absorbance of ZnO was shifted into the visible region by the dopants (Ag and Sm). The influences of operational parameters such as initial pH, dose of photocatalyst and dye concentration on photomineralization of MB have been analyzed. Sunlight (16 min) gives excellent results in photocatalytic degradation compared to LED (80 min). The microbial zones of Sm–ZnO–Ag (Nps) showed free radical generation. The Sm–ZnO–Ag catalyst is stable and it’s reusable. A degradation mechanism is proposed for the photodegradation of MB under LED/solar light.

/pdf/highly-photocatalyst-efficient-in-leds-solar-active-and-54n4630cmt.pdf

Highly photocatalyst efficient in LEDs/solar active and reusable: Sm–ZnO–Ag nanoparticles for methylene blue degradation

In the title compound, [CoCl(C2H7N)(C3H10N2)2]Cl2, the CoIII ion has a distorted octa­hedral coordination environment and is surrounded by four N atoms in the equatorial plane, with the other N and Cl atoms occupying the axial positions The crystal packing is stabilized by N—H⋯Cl hydrogen bonds, forming a layered arrangement parallel to (1-10)

cis-Chlorido(ethyl-amine)-bis-(propane-1,3-diamine)-cobalt(III) dichloride.

In the title compound, [CoCl(CH5N)(C3H10N2)2]Cl2·H2O, the CoIII ion has an octa­hedral coordination environment and is surrounded by four N atoms of two propane-1,3-diamine ligands in the equatorial plane, with another N atom of the methylamine ligand and a Cl atom occupying the axial positions. The crystal packing is stabilized by inter­molecular N—H⋯O, N—H⋯Cl, and O—H⋯Cl inter­actions, generating a three-dimensional network.

cis-Chlorido(methyl­amine)­bis­(propane-1,3-diamine)­cobalt(III) dichloride monohydrate

Photocatalyst (Eu–ZnO–Ag) was synthesized by precipitation-decomposition process. The
characterization catalyst by phase and size of catalyst by powder-XRD, morphology of catalyst by FE-SEM and optical properties by UV-visible and emission spectroscopy. The photocatalytic action of Eu–ZnO–Ag was investigated in the photodegradation of methylene blue dye in water under LEDs/ solar light. Eu–ZnO–Ag catalyst is indicating the excellent activity than Ag–ZnO, Eu–ZnO commercial ZnO/TiO2 nanoparticles. Co-dopants (Eu/Ag) shift the light absorbance of ZnO toward visible region. Factor affecting of photodegrdation study by dose, dye, solution pH on of methylene blue dye present solar/LEDs. The Eu–ZnO–Ag is established to be reusable photocatalyst. A potential photodegradation of methylene blue mechanism was discussed under illuminations LEDs/solar light.

/pdf/synthesis-characterization-photocatalytic-activities-and-4wf2bp9mkm.pdf

Munisamy Manjunathan

Papers

Highly photocatalyst efficient in LEDs/solar active and reusable: Sm–ZnO–Ag nanoparticles for methylene blue degradation

cis-Chlorido(ethyl-amine)-bis-(propane-1,3-diamine)-cobalt(III) dichloride.

cis-Chlorido(methylamine)bis(propane-1,3-diamine)cobalt(III) dichloride monohydrate

Synthesis, Characterization, Photocatalytic Activities and Reusability of Eu-ZnO-Ag Nanoparticles using Sunlight/LEDs Illuminations

Munisamy Manjunathan

Papers

Highly photocatalyst efficient in LEDs/solar active and reusable: Sm–ZnO–Ag nanoparticles for methylene blue degradation

cis-Chlorido(ethyl-amine)-bis-(propane-1,3-diamine)-cobalt(III) dichloride.

cis-Chlorido(methyl­amine)­bis­(propane-1,3-diamine)­cobalt(III) dichloride monohydrate

Synthesis, Characterization, Photocatalytic Activities and Reusability of Eu-ZnO-Ag Nanoparticles using Sunlight/LEDs Illuminations

cis-Chlorido(methylamine)bis(propane-1,3-diamine)cobalt(III) dichloride monohydrate