The invention relates to single-atom Fe catalysts useful for the electrochemical reduction of carbon dioxide, method of preparation as uses thereof. In particular, the invention relates to a method of preparation of Fe(II) doped Zn-ZIF precursor material and use thereof in the preparation of a catalyst containing Fe single atoms on N doped carbon matrix derived from the pyrolysis of this Fe(II) doped Zn-ZIF precursor material.

Methods are provided for synthesizing metal organic framework compositions in an aqueous environment and/or in a mixed alcohol/water solvent. The methods can allow for formation of MOF-274 metal organic framework compositions, such as EMM-67 (a mixed metal MOF-274 metal organic framework composition). More generally, the methods can allow for formation of MOF structures that include disalicylate linkers in an aqueous environment and/or in a mixed alcohol/water solvent.

Methods are provided for synthesizing metal organic framework compositions in an aqueous environment and/or in a mixed alcohol/water solvent. The methods can allow for formation of MOF-274 metal organic framework compositions, such as EMM-67 (a mixed metal MOF-274 metal organic framework composition). More generally, the methods can allow for formation of MOF structures that include disalicylate linkers in an aqueous environment and/or in a mixed alcohol/water solvent.

The present invention relates to novel microporous zirconium silicate compositions that are formulated to remove toxins, e.g. potassium ions, from the gastrointestinal tract at an elevated rate without causing undesirable side effects. The preferred formulations are designed avoid increase in pH of urine in patients and/or avoid potential entry of particles into the bloodstream of the patient. Also disclosed is a method for preparing high purity crystals of UZSi-9 exhibiting an enhanced level of potassium exchange capacity. These compositions are particularly useful in the therapeutic treatment of hyperkalemia.

The present invention relates to novel microporous zirconium silicate compositions that are formulated to remove toxins, e.g. potassium ions, from the gastrointestinal tract at an elevated rate without causing undesirable side effects. The preferred formulations are designed avoid increase in pH of urine in patients and/or avoid potential entry of particles into the bloodstream of the patient. Also disclosed is a method for preparing high purity crystals of UZSi-9 exhibiting an enhanced level of potassium exchange capacity. These compositions are particularly useful in the therapeutic treatment of hyperkalemia.

The present invention provides a preparation method for zeolitic imidazolate frameworks. The preparation method comprises: adding a metal carbonate or oxide, an organic ligand to a hydrophilic liquid to obtain a mixture; introducing an acidic gas to reach a reaction pressure of 0.1 MPa to 2.0 MPa, and reacting for a predetermined time; heating to 30 C.-60 C. and vacuuming to obtain the zeolitic imidazolate framework. The present invention also provides a zeolitic imidazolate framework obtained by the above preparation method. The preparation method according to the present invention is environmentally friendly and has a high yield.

The present invention provides a preparation method for zeolitic imidazolate frameworks. The preparation method comprises: adding a metal carbonate or oxide, an organic ligand to a hydrophilic liquid to obtain a mixture; introducing an acidic gas to reach a reaction pressure of 0.1 MPa to 2.0 MPa, and reacting for a predetermined time; heating to 30 C.-60 C. and vacuuming to obtain the zeolitic imidazolate framework. The present invention also provides a zeolitic imidazolate framework obtained by the above preparation method. The preparation method according to the present invention is environmentally friendly and has a high yield.

Porous carbon materials having a yolk-shell structure, methods of making and uses thereof are described. The porous carbon materials can have a sulfur-based yolk positioned within a hollow space of by a porous carbonized metal organic framework (MOF) shell.

The invention provides a method for synthesizing a mesoporous zeolite ETS-10 containing a metal without a templating agent. The method according to the invention comprises the steps of: mixing a silicon source with a NaOH solution to obtain a mixed solution so that the content of Na.sub.2O in the mixed solution is 10.0% to 20.0% by weight; adding a KOH or KF solution so that the content of K.sub.2O is 10.0% to 25.0% by weight and stirring it well; adding a titanium source solution and stirring it well; adding a precursor compound containing metal Ni and/or Co and stirring it well; and subjecting it to a crystallization reaction to obtain the mesoporous zeolite ETS-10. The mesoporous zeolite ETS-10 obtained by the invention has a specific surface area of 320 to 420 m.sup.2/g, a mesoporous volume of 0.11 to 0.21 cm.sup.3/g, and thus can be used as a catalyst and a support thereof in synthesis industry for macromolecular fine chemicals.

The invention provides a method for synthesizing a mesoporous zeolite ETS-10 containing a metal without a templating agent. The method according to the invention comprises the steps of: mixing a silicon source with a NaOH solution to obtain a mixed solution so that the content of Na.sub.2O in the mixed solution is 10.0% to 20.0% by weight; adding a KOH or KF solution so that the content of K.sub.2O is 10.0% to 25.0% by weight and stirring it well; adding a titanium source solution and stirring it well; adding a precursor compound containing metal Ni and/or Co and stirring it well; and subjecting it to a crystallization reaction to obtain the mesoporous zeolite ETS-10. The mesoporous zeolite ETS-10 obtained by the invention has a specific surface area of 320 to 420 m.sup.2/g, a mesoporous volume of 0.11 to 0.21 cm.sup.3/g, and thus can be used as a catalyst and a support thereof in synthesis industry for macromolecular fine chemicals.