http://nopr.niscpr.res.in/handle/123456789/67160 Sat, 10 Oct 2026 07:11:17 GMT 2026-10-10T07:11:17Z https://http://nopr.niscpr.res.in:443/retrieve/198724/cover page ijct kite.jpg http://nopr.niscpr.res.in/handle/123456789/67160 http://nopr.niscpr.res.in/handle/123456789/67172 Title: Deep eutectic solvent-mediated synthesis of W-Mo oxide nanocomposites for enhanced and tunable photochromic response Authors: Ajayi, A. A.; Oderinde, O.; Ogunbayo, S. O; Ayoni, O.O; Olawuyi, R. A; Agbeja, A. O. Abstract: This study details the synthesis and characterization of photochromic tungsten-molybdenum oxide (W-Mo) nanocomposites using a deep eutectic solvent (Ethaline) composed of choline chloride and ethylene glycol in a 1:2 molar ratio, providing a green and efficient fabrication route. FTIR analysis confirmed the successful incorporation of metal oxides into the DES matrix, evidenced by characteristic metal-oxygen (W-O and Mo-O) stretching vibrations observed within the 947-767 cm-1 and functional group interactions. Scanning electron microscopy imaging revealed agglomerated, irregularly shaped particles with porous morphologies, while energy dispersive X-ray spectroscopy confirmed the homogeneous distribution of W and Mo within the composite. X-Ray diffraction patterns indicated a predominantly amorphous structure with broad peaks corresponding to semicrystalline tungsten and molybdenum oxide phases. Ultraviolet-visible spectroscopy showed strong absorption in the 259-476 nm range, confirming efficient light-induced activation. The nanocomposites exhibited excellent photochromic performance, transitioning rapidly from cream-yellow to blue within three seconds under UV exposure, and reversibly fading in an oxygen-rich environment within 50 min. Electrochemical impedance spectroscopy (EIS) further revealed that the W-Mo (0.8:0.2) composite had the lowest charge transfer resistance, enhancing electron transport and accelerating photo-switching behaviour. The combined structural, optical, and electrochemical properties of these materials underscore their promise for use in smart windows, UV sensors, and dynamic display technologies. Page(s): 11-19 Thu, 01 Jan 2026 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/67172 2026-01-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/67171 Title: Preparation and performance of waterborne intumescent coatings with mechanical, thermal properties and optimization of flame retardant paints Authors: Lakhawat, Gajanan P.; Suke, Sanvidhan G.; Fulkar, Arti B.; Satpute, Ganesh D.; Pawade, Vijay B.; Modak, Jayant B.; Deshmukh, Waheed A Salim; Bhuyar, Kiran D. Abstract: Many industries typically like chemical industry, petrochemical and oil refineries etc. are prone to fire. In such a case intumescent (IMT) paint will provide extra protection to substrate wherever it is applied. The aim of present work was to optimize the fire protection performance and thermal properties of water-based IMT fire protective coatings on steel structures through the use of flame-retardant paints. The IMT coating paint was prepared using water-based styrene acrylic emulsion (SAE), flame-retardant additives (Ammonium phosphate, Pentaerythritol, Melamine and Dicyanadamide and flame-retardant fillers (TiO2 and CaCO3). All these ingredients are mixed using mortal pestle. The coating paints with and without fire retardant have been characterized by studying chemical properties by using FTIR, mechanical properties (Flexibility test, Impact resistance test and Pull off test) and thermal properties (Bunsen burner test, furnace test, and Thermogravimetric analysis test). The results demonstrated that mild steel specimens coated with IMT paint exhibited effective fire protection performance; excellent adhesion strength, improved uniform char layer formation, and enhanced thermal stability. It revealed that fire retardant coating had better or same properties than without fire retardant coating. Hence, formulated IMT coating paint proved effective in protecting steel structures against fire. Page(s): 20-28 Thu, 01 Jan 2026 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/67171 2026-01-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/67170 Title: Investigation of feldspar flocculation characteristics using anionic, cationic and non-ionic flocculants in single and two-step flocculation systems Authors: Kaya, Özlem; Özkan, Ahmet Abstract: This study investigates the flocculation behaviour of feldspar suspension using a variety of anionic, cationic, and non ionic flocculants (A.336, A.338, A.1011, A.5250, A.110, A.120, A.1858, C.573, N.333 and N.351) in single and two-step flocculation systems. Experiments have been performed at various dosages ranging from 0.2 to 12.5 mg/L. Flocculation performance is evaluated based on turbidity, settling rate, and efficiency. Of the flocculants tested, non-ionic flocculant N.351 demonstrated the most effective flocculation performance in terms of both turbidity reduction and flocculation efficiency. N.351 achieved a flocculation efficiency of 98.5% at a dosage of 0.8 mg/L, achieving the lowest turbidity value of 6.4 NTU (Nephelometric Turbidity Unit). Although N.351 demonstrated turbidity reduction and flocculation efficiency, the highest settling rates are observed in the two-step system employing the cationic-anionic flocculation combinations of C.573-A.338 and C.573-A.1011. These combinations achieved the highest settling rate of 2700 mm/min at dosages of 8.5 mg/L and 12.5 mg/L, respectively. This experimental study demonstrates that optimum flocculant dosages can vary significantly depending on the type of flocculant, the combination used, and the performance parameters. These results provide valuable information to optimize feldspar flocculation in industrial applications, which could improve process efficiency and product quality in feldspar using industries. Page(s): 29-36 Thu, 01 Jan 2026 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/67170 2026-01-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/67169 Title: Prediction of copper corrosion by machine learning and conventional methods in neem biodiesel with ecofriendly black pepper extract Authors: S, Iyyappan; P, Vinod Kumar K; B, Karthik; A, Nagarajan V Abstract: Copper is extensively utilized across many industries due to its outstanding attributes, nonetheless, undergoes corrosion in biodiesel. In view of this menace, eco-friendly black pepper extract was investigated as a corrosion inhibitor for copper in neem biodiesel. Weight loss measurement of copper in neem biodiesel was performed and the resulting values were utilized to calculate inhibition efficiency, corrosion rate, and thermodynamic parameters. A quadratic regression machine learning algorithm was employed to analyze copper corrosion at the operational temperature of the engine. Additionally, FTIR and SEM analyses were performed to identify the functional groups of the inhibitor responsible for corrosion inhibition through adsorption and to examine the surface morphology of the metal respectively. A corrosion inhibition efficiency of 98.0% for copper in neem biodiesel was achieved at room temperature, and the inhibitor demonstrated significant effectiveness at the operating temperature of engine nozzles. Carbonyl and amine groups of the inhibitor adsorbed on the metal formed a barrier against biodiesel enabling corrosion protection. This value-added biodiesel presents a viable alternative fuel option that protects engine components and storage tanks from corrosion. Page(s): 37-47 Thu, 01 Jan 2026 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/67169 2026-01-01T00:00:00Z