- Cu-α-NiMoO4 photocatalyst for degradation of Methylene blue with pathways and antibacterial performance
-
Cu doped α-NiMoO4 photocatalyst has been synthesized by microwave hydrothermal method. The existence of Cu2+ ions at lattice position of α-NiMoO4 was observed on the basis of XRD, HRTEM, SAED, and EDS analysis. The negative zeta potential values indicate the stability of samples. Solar light driven photocatalytic degradation of Methylene blue (MB) dye in water was used to evaluate the photocatalytic performance of Cu doped α-NiMoO4 photocatalyst. The results revealed that there is an optimum Cu (4 mol%) doping level leads to highly enhanced photocatalytic activity of Cu-α-NiMoO4, as compared to α-NiMoO4 host. The experiment also suggested that active species (OH[rad], O2[rad]? and h+) play a crucial role in the scavenging system. The reduced energy band gap, oxygen vacancy, high BET surface area, and efficient separation of photogenerated electron/hole are responsible for enhancement of photocatalytic performance. MB photodegradation intermediates were identified by high resolution-quadruple time of flight electrospray ionization mass spectrometry (HR-QTOF ESI/MS) in positive ion mode and degradation pathway was proposed. Antibacterial performance was analyzed against Gram-positive (methicillin resistant Staphylococcus aureus and Bacillus Subtilis) and Gram-negative bacteria (Pseudomonas aeruginosa) via well-diffusion method. The formation of larger inhibition zone by small quantity of photocatalyst powder proved the excellent antibacterial performance. The inactivation of microorganism were found in following order: B.Subtilis ? S.aureus ? P.aeruginosa. The result of our study suggested that copper doped α-NiMoO4 photocatalyst is suitable for degradation of organic contaminates as well as effective for growth inhibition of multidrug-resistant microorganisms.
- Ray, Schindra Kumar,Dhakal, Dipesh,Kshetri, Yuwaraj K.,Lee, Soo Wohn
-
-
- Fiber reactive anthraquinone dyes
-
The invention is that of a water soluble fiber reactive anthraquinone blue dyes. These dyes may be used to dye and print textiles and other substrates containing hydroxy and or groups in brilliant blue colors. The dyes of the invention are free of heavy metals.
- -
-
-
- Amino disazo dyestuffs containing a fluoropyrimidinyl or a fluorotriazinyl reactive group
-
Dyestuffs of the formula STR1 wherein X=--CH=CH2, --CH2 --CH2 OSO3 H, --CH=CHCl or --CH2 --CH2 Cl and Y=a fiber-reactive fluoropyrimidinyl or fluorotriazine radical and wherein u and v=H or SO3 H, where u~v. Such dyestuffs suitable for dyeing and printing diverse substrates, particularly cotton, to give products a high degree of dyestuff fixation.
- -
-
-
- Fiber-reactive disazo brown dye having vinylsulfone-type reactive group
-
A compound, or a salt thereof, represented by the following formula, STR1 wherein A is a substituted or unsubstituted phenylene or naphthylene group, B is STR2 in which R3 is a hydrogen atom or a lower alkyl, lower alkoxy, acylamino or ureido group, and R4 is a hydrogen atom or a lower alkyl or lower alkoxy group, R1 and R3 are independently a hydrogen atom or a substituted or unsubstituted lower alkyl group, X is a substituted or unsubstituted amino, lower alkoxy, substituted phenoxy or sulfo group, Y is --SO2 CH=CH2 or --SO2 CH2 CH2 Z, in which Z is a group capable of being split by the action of an alkali, and m is 2 or 3, which is useful for dyeing hydroxyl group- or amide group-containing fiber materials to give dyed products of a brown color having excellent fastness properties with good build-up property.
- -
-
-
- Preparation having excellent absorption property
-
A preparation containing an absorption promoter selected from specific classes of water-soluble macromolecular compounds having chelating activity, preferably in the presence of a salt at a concentration such that the composition exhibits higher osmotic pressure than isotonic sodium chloride solution, and a medicine is found to promote absorption of the medicine through a gastrointestinal organ such as the colon, rectum, or vagina.
- -
-
-