Protective textiles against harmful solar radiation are quite important materials for outdoor workers to secure their skin from several diseases. Current report focuses on production of anti-ultraviolet radiation (UVR) textiles by incorporation of nano-metal-organic frameworks (n-MOFs). Two different MIL-MOFs, namely, MIL-68(In)-NH and MIL-125(Ti)-NH, were immediately formed inside natural textiles (cotton and silk) matrix in nano size using quite simple and one-pot process. The formation of n-MIL-MOFs inside textiles were confirmed by using electron microscope and X-ray diffraction. Different size and morphology were seen depending on textile type reflecting the textiles' chemical composition role in the nature of prepared MIL-MOFs. For MIL-68(In)-NH, particles with size distribution of 70.6-44.5 nm in cotton and 81.3-52.2 nm in silk were detected, while crystalline disc of MIL-125(Ti)-NH was clearly seen inside textiles. The natural textiles exhibited full UVR blocking after modification, and the UV protection factor (UPF) was linearly proportional with MIL-MOFs and metal contents. Whatever metal type, direct incorporation of MIL-MOF contents greater than or equal to 10.4 g/kg was sufficient to attain excellent UV blocking property. Although 38.5-41.0% of MIL-MOFs was lost during five washings, the washed samples showed very good blocking rate (UPF = 26.7-36.2) supporting good laundering durability.

Pesticide removal from wastewater is of significant general benefit to protect of humans from the effect of pollution.

No abstract

No abstract

No abstract

Production of protective textiles against solar radiation and microbial pathogens has been progressively considered in the area of the textile industry to rescue the human health. In this regard, herein, a novel technique for the preparation of multifunctional textiles via incorporation of silicate and zeolitic imidazole frameworks (ZIFs) has been systematically studied. ZIF(Ni), ZIF-8(Zn), and ZIF-67(Co) as three different ZIFs were formed directly within the cotton fabrics before and after silicate modification. Due to their cross-linking effect, insertion of silicate first increased the amount of adsorbed MOF onto fabrics from 101.8−108.6 to 141.6− 149.1 mg/g. The direct formation of ZIF within cotton fabrics was confirmed by electron microscopy, X-ray diffraction, and infrared spectra. After modification with ZIF(Ni) and ZIF-67(Co), the cotton fabrics gained brown and purple decorative colors, respectively, with good fastness properties. Modification of cotton fabrics with silicate followed by ZIF(Ni) showed excellent UV protection (UPF = 47) and lowered to very good protection (UPF = 36.3) after five repetitive washings. Even after five repetitive washings, the fabrics modified with ZIF(Ni) and ZIF-67(Co) exhibited excellent and good antimicrobial activity, respectively, against Staphylococcus aureus, Bacillus cereus, Escherichia coli, and Candida albicans. Durable and protective cotton textiles with a desired decorative color were designed successfully by incorporation of silicate followed by ZIF(Ni) and ZIF-67(Co) through using a simple strategy that is easily applicable in the textile industry.

No abstract

NH2 -MIL-125, [Ti8 O8 (OH)4 (bdc-NH2 )6 ] (bdc(2-) =1,4-benzene dicarboxylate) is a highly porous metal-organic framework (MOF) that has a band gap lying within the ultraviolet region at about 2.6 eV. The band gap may be reduced by a suitable post-synthetic modification of the nanochannels using conventional organic chemistry methods. Here, it is shown that the photocatalytic activity of NH2 -MIL-125 in the degradation of methylene blue under visible light is remarkably augmented by post-synthetic modification with acetylacetone followed by Cr(III) complexation. The latter metal ion extends the absorption from the ultraviolet to the visible light region (band gap 2.21 eV). The photogenerated holes migrate from the MOF's valence band to the Cr(III) valence band, promoting the separation of holes and electrons and increasing the recombination time. Moreover, it is shown that the MOF's photocatalytic activity is also much improved by doping with Ag nanoparticles, formed in situ by the reduction of Ag(+) with the acetylacetonate pendant groups (the resulting MOF band gap is 2.09 eV). Presumably, the Ag nanoparticles are able to accept the MOF's photogenerated electrons, thus avoiding electron-hole recombination. Both, the Cr- and Ag-bearing materials are stable under photocatalytic conditions. These findings open new avenues for improving the photocatalytic activity of MOFs.