Abstract: A luminescent cerium (Ce) doped compound emitting bright red light, comprising a calcium silicate nitride ternary system, such as CaSiN2-?O?:Ce3+, that crystallizes in a face-centered cubic unit cell with a lattice parameter of ˜a=14.88 ?. The Ce doped compound can be used for white light applications either: (i) to enhance the light quality of the system based on a blue LED with a yellow or green phosphor, (ii) as an orange phosphor in combination with a blue LED and a green phosphor, or (iii) as a red phosphor in a setup comprising a ultraviolet (UV) LED and red, green and blue (RGB) phosphors. Substitution of smaller elements on the Ca site or larger elements on the Si site leads to a decrease of the emission wavelength towards the yellow or orange region.

Abstract: A crystalline phosphor of formula: Lnx.(1?t1?t2?t3?t4)Ybx.t1Erx.t2Tmx.t3Hox.14BayZnzO1.5x+y+z in which: Ln is Y, Gd or La; t1+t2+t3+t4 varies from 0.001 to 0.3; and such that, when x=2, y=1 and z=1: t1+t3+t4 is nonzero; if Ln is La or Gd and if t3+t4 is zero, then t1 varies from 0.05 to 0.1 and t2 varies from 0.02 to 0.07; and if Ln is Gd, then t2+t4 is nonzero.

Abstract: The subject of the invention is a compound chosen from compounds of formula Y2BaZnO5:Er3+, La2BaZnO5:Er3+, Gd2BaZnO5:Er3+, Gd2BaZnO5:Yb3+/Er3+, Gd2BaZnO5:Yb3+/Tm3+. These compounds are capable of converting radiation into radiation with a higher energy level than that of the incident radiation.

Abstract: The present invention relates to a process for preparing nanoporous VSB-5 molecular sieves, and more particularly, to a process for preparing nanoporous VSB-5 molecular sieves useful as a hydrogen storage material, a catalyst, a catalyst supporter and an adsorbent, performed in such a manner that low-cost inorganic base or monoamine instead of a template essential in the conventional process is, as a pH modifier, incorporated into raw materials comprised of nickel and phosphorous compounds and crystallized to give VSB-5 molecular sieves in an economical and efficient manner.

Abstract: The present invention relates to a composition of metal-incorporated VSB-5 molecular sieve with nanopores and its preparation method, in particular, to a composition of a metal-incorporated VSB-5 molecular sieve with a framework of VSB-5 molecular sieve comprising nickel, phosphorous, oxygen and metal, which is useful in various fields such as a hydrogen storage material, an optical and electric/electronic material, a sensor, a catalyst, a catalyst supporter and an adsorbent, and its preparation method performed in such a manner that a specific metal component is added in a predetermined mole ratio to a reaction mixture comprised of nickel and phosphorous compounds and the resultant mixture is crystallized in the presence of inorganic or organic base as a pH modifier to yield a metal-incorporated VSB-5 molecular sieves in an economical and efficient manner.

Abstract: A red phosphor composition in combination with a semiconductor light emitting device (e.g., VCSEL, LED, or LD), preferably a GaN based device, that emits light at a bright violet-blue light range, i.e., having a wavelength in the range of 400 nm to 600 nm, which can be further combined with green and blue phosphors. The red phosphor composition in the combination is a vanadate combined with yttrium, gadolinium and/or lanthanum and activated with trivalent Eu3+, Sm3+ and Pr330 , or any combination thereof, with or without Tb3+ as a co-dopant, has the general formula: BixLn1-xVO4:A where x=0 to 1, Ln is an element selected from the group consisting of Y, La and Gd, and A is an activator selected from Eu3+, Sm3+ and Pr3+, or any combination thereof, with or without Tb3+ as a co-dopant. Novel red phosphor compositions are provided when x is greater than 0 and less than 1, preferably 0.05 to 0.5.

Abstract: A red phosphor composition in combination with a semiconductor light emitting device (e.g., VCSEL, LED, or LD), preferably a GaN based device, that emits light at a bright violet-blue light range, i.e., having a wavelength in the range of 400 nm to 600 nm, which can be further combined with green and blue phosphors. The red phosphor composition in the combination is a vanadate combined with yttrium, gadolinium and/or lanthanum and activated with trivalent Eu3+, Sm3+ and Pr3+, or any combination thereof, with or without Tb3+ as a co-dopant, has the general formula: BixLn1?xVO4:A where x=0 to 1, Ln is an element selected from the group consisting of Y, La and Gd, and A is an activator selected from Eu3+, Sm3+ and Pr3+, or any combination thereof, with or without Tb3+ as a co-dopant. Novel red phosphor compositions are provided when x is greater than 0 and less than 1, preferably 0.05 to 0.5.

Abstract: A method of converting a reactant gas mixture of CO.sub.2, O.sub.2 and CH.sub.4 comprises contacting the reactant gas at 750.degree.-850.degree. C. with a solid catalyst, which is a d-block transition metal or oxide such as a group VIII metal on a metal oxide support such as alumina, and which selectively converts the reactant gas into a product gas mixture comprising H.sub.2 and CO.

Abstract: A method of converting a reactant gas mixture of CO.sub.2, O.sub.2 and CH.sub.4 comprises contacting the reactant gas at 750-850.degree. C. with a solid catalyst, which is a d-block transition metal or oxide such as a group VIII metal on a metal oxide support such as alumina, and which selectively converts the reactant gas into a product gas mixture comprising H.sub.2 and CO.

Abstract: A method for selectively oxygenating methane to carbon monoxide and hydrogen by bringing the reactant gas mixture at a temperature of at least 600.degree. C. into contact with a sold catalyst which is either:a) a catalyst of the formula M.sub.x M'.sub.y O.sub.z where:M is at least one element selected from Mg, B, Al, Ln, Ga, Si, Ti, Zr and Hf,Ln is at least one member of lanthanum and the lanthanide series of elements,M'is a d-block transition metal,and each of the ratios x/z and y/z and (x+y)/z is independently from 0.1 to 8; orb) an oxide of a d-block transition metal; orc) a d-block transition metal on a refractory support; ord) a catalyst formed by heating a) or b) under the conditions of the reaction or under non-oxidizing conditions.