Abstract: An 8-hydroxyquinoline modified halloysite nanoclay (8-HQHNC) is provided. The 8-HQHNC is used in a method of removing heavy metals and/or salt from a solution which includes steps of contacting the solution with 8-HQHNC under conditions suitable for the adsorption of the heavy metals and/or salt to the 8-HQHNC and recovering the 8-HQHNC from the solution.

Abstract: Methods for treating fluids used in the production and/or transport of petroleum products and natural gas, and methods for the removal of acidic gases encountered in fluids used and encountered in such operations are provided. In one embodiment, the methods include introducing a treatment fluid including a polymeric swellable acid scavenger that includes at least one polymeric composition into a wellbore penetrating at least a portion of a subterranean formation in which an acidic gas, an acid-containing fluid, or both, are present.

Abstract: Methods for treating fluids used in the production and/or transport of petroleum products and natural gas, and methods for the removal of acidic gases encountered in fluids used and encountered in such operations are provided. In one embodiment, the methods include introducing a treatment fluid including a polymeric swellable acid scavenger that includes at least one polymeric composition into a wellbore penetrating at least a portion of a subterranean formation in which an acidic gas, an acid-containing fluid, or both, are present.

Abstract: Methods and compositions for treating subterranean formations with fluids containing lost circulation materials are provided. In one embodiment, the methods introducing a treatment fluid that includes a base fluid and a lost circulation material into a wellbore penetrating at least a portion of a subterranean formation, wherein the lost circulation material includes a plurality of particles having a multi-modal particle size distribution comprising a d10 value ranging from about 20 to about 50 microns, a d50 value ranging from about 55 to about 90 microns, and d90 value ranging from about 240 to about 340 microns.

Abstract: Methods and compositions for treating subterranean formations with fluids containing lost circulation materials are provided. In one embodiment, the methods introducing a treatment fluid that includes a base fluid and a lost circulation material into a wellbore penetrating at least a portion of a subterranean formation, wherein the lost circulation material includes a plurality of particles having a multi-modal particle size distribution comprising a d10 value ranging from about 20 to about 50 microns, a d50 value ranging from about 55 to about 90 microns, and d90 value ranging from about 240 to about 340 microns.

Abstract: Salt-free invert emulsions having an external phase comprising a hydrocarbon fluid, and an internal phase comprising a hygroscopic fluid selected from the group consisting of an amino alcohol, a glycol, an amine glycol, and any combination thereof. Methods including introducing the salt-free invert emulsion into a subterranean formation and performing a subterranean formation operation.

Abstract: Methods of preparing Pt/SrTiO3 photocatalysts comprising strontium titanate nanoparticles and platinum doped on a surface of the strontium titanate nanoparticles are described. Processes of oxidizing cycloalkanes to cycloalkanols and/or cycloalkanones by employing the Pt/SrTiO3 photocatalysts are specified. A method for recycling the photocatalyst is also provided.

Abstract: Methods of preparing Pt/SrTiO3 photocatalysts comprising strontium titanate nanoparticles and platinum doped on a surface of the strontium titanate nanoparticles are described. Processes of oxidizing cycloalkanes to cycloalkanols and/or cycloalkanones by employing the Pt/SrTiO3 photocatalysts are specified. A method for recycling the photocatalyst is also provided.

Abstract: Methods of preparing Pt/SrTiO3 photocatalysts comprising strontium titanate nanoparticles and platinum doped on a surface of the strontium titanate nanoparticles are described. Processes of oxidizing cycloalkanes to cycloalkanols and/or cycloalkanones by employing the Pt/SrTiO3 photocatalysts are specified. A method for recycling the photocatalyst is also provided.

Abstract: Methods of preparing Pt/SrTiO3 photocatalysts comprising strontium titanate nanoparticles and platinum doped on a surface of the strontium titanate nanoparticles are described. Processes of oxidizing cycloalkanes to cycloalkanols and/or cycloalkanones by employing the Pt/SrTiO3 photocatalysts are specified. A method for recycling the photocatalyst is also provided.

Abstract: A nanocomposite that includes a core containing silver nanoparticles, and a shell that includes polypyrrole and carbon nanotubes, wherein the polypyrrole covers at least a portion of the carbon nanotubes, and wherein the shell covers at least a portion of the core and a method of making the nanocomposite. Various combinations of the nanocomposite, the method of making the nanocomposite, and a method of disinfecting an aqueous solution with the nanocomposite, are also provided.

Abstract: A nanocomposite that includes a core containing silver nanoparticles, and a shell that includes polypyrrole and carbon nanotubes, wherein the polypyrrole covers at least a portion of the carbon nanotubes, and wherein the shell covers at least a portion of the core and a method of making the nanocomposite. Various combinations of the nanocomposite, the method of making the nanocomposite, and a method of disinfecting an aqueous solution with the nanocomposite, are also provided.

Abstract: Salt-free invert emulsions having an external phase comprising a hydrocarbon fluid, and an internal phase comprising a hygroscopic fluid selected from the group consisting of an amino alcohol, a glycol, an amine glycol, and any combination thereof. Methods including introducing the salt-free invert emulsion into a subterranean formation and performing a subterranean formation operation.

Abstract: A method of synthesizing manganese oxide nanocorals comprises the steps of a) heating a potassium permanganate solution; (b) providing manganese sulfate in a basic solution; (c) combining the manganese sulfate basic solution drop-wise with the heated potassium permanganate solution until a brown precipitate is formed; (d) stirring the brown precipitate for a period of about 12 hours at a temperature greater than 300 K; (e) isolating the precipitate; and (f) drying the precipitate inside an oven at a temperature greater than 300 K to provide manganese oxide nanocorals. The manganese oxide nanocorals include nanowires having a diameter typically ranging from about 20 nm to about 40 nm.

Abstract: A method of synthesizing manganese oxide nanocorals comprises the steps of a) heating a potassium permanganate solution; (b) providing manganese sulfate in a basic solution; (c) combining the manganese sulfate basic solution drop-wise with the heated potassium permanganate solution until a brown precipitate is formed; (d) stirring the brown precipitate for a period of about 12 hours at a temperature greater than 300 K; (e) isolating the precipitate; and (f) drying the precipitate inside an oven at a temperature greater than 300 K to provide manganese oxide nanocorals. The manganese oxide nanocorals include nanowires having a diameter typically ranging from about 20 nm to about 40 nm.

Abstract: The method and nanocomposite for treating wastewater provides a method of treating aniline-containing wastewater with a magnetic nanocomposite. Nickel nitrate, iron nitrate and citric acid are dissolved in deionized water to form a metal nitrate and citric acid solution, which is then pH balanced. The pH balanced solution is then heated to form a gel, which is then ignited to form powdered NiFe2O4. Nanoparticles of the powdered NiFe2O4 combustion product are then mixed with multi-walled carbon nanotubes to form a magnetic nanocomposite, such that the magnetic nanocomposite includes approximately 75 wt % of the multi-walled carbon nanotubes and approximately 25 wt % of the NiFe2O4. The magnetic nanocomposite may then be mixed into a volume of aniline-containing wastewater for adsorption of the aniline by the nanocomposite. A magnetic field is then applied to the mixture to magnetically separate the magnetic nanocomposite and the adsorbed aniline from the wastewater.

Abstract: The method and nanocomposite for treating wastewater provides a method of treating aniline-containing wastewater with a magnetic nanocomposite. Nickel nitrate, iron nitrate and citric acid are dissolved in deionized water to form a metal nitrate and citric acid solution, which is then pH balanced. The pH balanced solution is then heated to form a gel, which is then ignited to form powdered NiFe2O4. Nanoparticles of the powdered NiFe2O4 combustion product are then mixed with multi-walled carbon nanotubes to form a magnetic nanocomposite, such that the magnetic nanocomposite includes approximately 75 wt % of the multi-walled carbon nanotubes and approximately 25 wt % of the NiFe2O4. The magnetic nanocomposite may then be mixed into a volume of aniline-containing wastewater for adsorption of the aniline by the nanocomposite. A magnetic field is then applied to the mixture to magnetically separate the magnetic nanocomposite and the adsorbed aniline from the wastewater.