Cadmium Ion Adsorption Controls the Growth of CdS Nanoparticles on Layered Montmorillonite and Calumit Surfaces

Preparation of metal sulfide mixtures in montmorillonite by solid–solid reactions

“…In this study, the hybrids of metal sulfide mixtures and montmorillonite were prepared by solid-solid reactions between cation exchanged montmorillonite and sodium sulfide. The in situ formation of single CdS or ZnS nanoparticles in layered montmorillonite and calumite surface through colloidal chemical route for the controlled growth of the semiconductors has been reported so far (Kotov et al, 1993;Dékány et al, 1995Dékány et al, , 1999a. The use of solid-solid reaction for the incorporation of single semiconductor in the two dimensional nanospaces was reported to find the modification of the optical properties and/or stabilities if compared with those of neat counterparts (Ogawa et al, 1991;Khaorapapong et al, , 2009.…”

“…It was found that the structure of smectites plays an important role in controlling structure and properties of resulting host-guest complexes with various guests including metal oxides, metal chalcogenides, metal complexes and so on Ontam et al, 2012;Khumchoo et al, 2015). Generally, the intercalation of the guest species in layered clay minerals is obtained by the reaction in liquid (both neat liquid and solution) media (Kotov et al, 1993;Dékány et al, 1995Dékány et al, , 1999a. Meanwhile, solid-solid reaction is also a simple and effective method to incorporate many guest species in layered clay mineral …”

“…A large number of surface defects, instability during prolonged light irradiation (Jia et al, 2011), as well as low quantum yield (Rajeshwar et al, 2001) have been proposed as drawbacks, which limit the optical applications. To overcome the limitation of the semiconductors, synthetic effort has been devoted to control the structure and particle size using a variety of methods such as mixing of semiconductors (Ge et al, 2011;Viswanath et al, 2014) and doping foreign metal ion (Yang et al, 2012;Labiadh et al, 2013), surface capping as well as immobilization on effective media or supports including polymer, layered inorganic solids and so forth (Kotov et al, 1993;Dékány et al, 1995Dékány et al, , 1999aSzabó et al, 2003;Maity et al, 2006;Miao et al, 2006;Nascimento et al, 2012;Praus et al, 2013;Soltani et al, 2013;Sharma and Gosavi, 2014). Besides the preparation of single metal sulfide, metal sulfide mixtures have been studied because the combination of characteristic of each metal sulfide provided the modified properties due to newly created electronic structure and/or morphology (Hsu et al, 2005;Zheng et al, 2009;Raubach et al, 2012).…”

Preparation of TiO2 nanoparticles on the surface of SiO2 in binary liquids

“…Microelumisions and inverse microelumisions [2][3][4] are typical cases. Developing methods by using interlaminar construction and pore space of celit, montmorillonite as nanoscale reactors are extended of this idea [5,6]. Recently, Dékány et al [7] and Dékány and co-workers [8] presented a new technology of nanophase reactor for in situ preparation of nanoparticles on support surface.…”

Intercalation of [Pt(NH3)4]2+ ions into layered sodium silicate magadiite: a useful method to enhance their stabilisation in a highly dispersed state

“…ions into clay minerals, Na-montmorillonite, has been reported by Kijima et al [25]. Although clay minerals, such as montmorillonite [26] and smectite [27], have been used as hosts for the preparation of transition metal nanoparticles, the use of clay minerals imposes some rather serious limitations. For instance, clay minerals possess hydrolytic instability in acidic and basic conditions; and very low ionexchange capacity.…”