AgCl nanoparticles

Fig. 1 TEM images and size distributions of AgCl nanoparticles in electrospun PAN/AgCl composite fibers. Molar ratio of AgCl to acrylonitrile was (a) 1 20, (b) 1 10, and (c) 1 5...

Fig. 2 (a, b) TEM images of AgCl/PVP nanocomposite fibers, (c) Electron diffraction patterns of composite nanofibers, (d) Size distributions of AgCl nanoparticles in composite nanofibers... 

AgCl nanoparticles have been synthesised by using a water/cyclohexane/polyoxyethylene (6) nonylphenyl ether (NP-6) microemulsion wherein AgN03 and KC1 solutions were added and mixed [66]. The particle growth rate and the final particle size at a given co were... 

Kimijima, K. and Sugimoto, T. (2005) Effects of water content on the growth rate of AgCl nanoparticles in a reversed micellar system. /. Colloid Interface Sci., 286, 520-525. 

A PPy-chitosan hollow nanosphere (core diameter 20 3 nm, shell thickness 15 4 nm) has been fabricated by using AgCl nanoparticle as a sacrificial core at 2 °C [221,222]. The core and shell were sequentially formed in the same reaction medium. During the synthetic process, chitosan stabihzed the AgCl nanoparticle and prevented the aggregation of PPy. In addition, the PPy hollow nanosphere was stable in acidic aqueous media and insoluble in basic media due to the presence of chitosan in the shell part. 

Figure 1.12 Typical SEM image of the AgCl nanoparticles formed at the surface of the silk fibre. The AgCl nanoparticles were synthesised by 20 alternate dippings in AgN03 and NaCl solutions (10 times in AgNOj and 10 times in NaCl solution) followed by a rinse in water...

Fig. 15 (A) Typical SEM image of the as-synthesized AgCl nanoparticles (B) Absorption spectra of the AgCl nanoparticles shown in (A) before (labeled with AgCl) and after (labeled with AgCLAg) reduction at 160 °C (C) )The normalized concentration of the MB monomer molecules as a function of reaction time in both linear (- -) and logarithmic (- -) scale (D) Degradation kinetics of MB molecules for 10 successive reactions catalyzed with the same batch of AgCl Ag nanoparticles under visible-light irradiation. Reproduced from ref. 16. Copyright (2010), with permission from John Wiley and Sons.

Fig. 17 (A) Schematic illustration of the synthesis process for Ag/AgCl nanoparticles and the photocatalytic degradation of organic dyes (B) XRD pattern of as-synthesized Ag AgCl (C) TEM image of Ag AgCl nanoparticles. Reprinted with permission from ref. 19. Copyright (2014) American Chemical Society.

Sato etal. [238] studied the mechanism of formation of silver halide particles grown from reverse microemulsions. In a typical process, aqueous solutions of either (a) silver nitrate or (b) a sodium salt, i.e. sodium chloride, bromide or iodide was injected into AOT/isooctane reverse micelles. When equal volumes of the two kinds of microemulsion were rapidly mixed at 25°C, particles started forming. The particle diameter was a function of the type of the anion, the w value as also reaction time. For AgBr, the maximum diameter was - 2.7 nm for Agl, it went up to 5.5 nm. Bagwe and Khilar [444] synthesized AgCl nanoparticles from AOT/ alkane (cyclohexane, heptane, decane) systems. The aqueous phases were solutions of silver nitrate or alkali/alkaline earth halides. The number average particle size was in the range of 4-10 nm. 

Typical behavior is shown in Fig. 9, where the enthalpy of formation of AgCl nanoparticles in AOT reversed micelles is reported as a function of the molar ratio R at various salt concentrations. As can be seen, the enthalpies become more exothermic as R increases. The small AH values at lower R, corresponding to... 

Figure 14 The UV-Vis absorption spectra obtained from the fiberoptic reactor for (a) Agl, (b) AgBr, and (c) AgCl nanoparticles synthesized in supercritical CO2 by mixing two water-in-C02 microemulsions. (From Ref. 14.)... 

FIG. 19 Average diameter of the AgCl nanoparticles prepared in the system AOT/ -heptane/water as a function of the concentration of precursor salt and the value of R. 

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