The invention concerns a process for producing gaseous dihydrogen and ammonium sulphate from an aqueous liquid effluent containing organic and inorganic materials or a mixture of aqueous liquid effluents,

said process comprising the following steps: nanofiltration of said aqueous liquid effluent or said mixture of aqueous liquid effluents so as to obtain a permeate; ammonia stripping of the permeate from said nanofiltration step in an ammonia stripping unit so as to obtain an ammonium sulphate; treatment by reverse osmosis of at least part of the permeate extracted from the ammonia stripping unit after said ammonia stripping step, so as to obtain an osmosed aqueous solution; electrolysis of at least part of said osmosis aqueous solution so as to decompose said part of said osmosis aqueous solution into at least gaseous dihydrogen.

Techniques are disclosed for electrochemical synthesis of rechargeable battery cathode precursor materials using a porous carbon element. The porous carbon element acts as an air cathode to reduce oxygen. Reduced oxygen species may oxidize a transition metal anode, thereby facilitating a room temperature redox reaction with transition metals, including those that are generally resistant to corrosion, such as nickel. The transition metal reaction product(s) may be further processed into rechargeable battery cathode materials without also synthesizing hazardous waste products.

The present invention provides a C.sub.3N.sub.4 having a cubic crystal system and a method for producing same.

The present invention provides a C.sub.3N.sub.4 having a cubic crystal system and a method for producing same.

A method for the extraction of at least one target component from a starter electrolyte composition comprises the steps of providing at least one electrochemical cell, introducing to or creating within a catholyte chamber of the at least one electrochemical cell a starter electrolyte composition comprising at least one target component and one or more additives, and facilitating, via the one or more additives, targeted electrochemical manipulation of the at least one target component.

A method for the extraction of at least one target component from a starter electrolyte composition comprises the steps of providing at least one electrochemical cell, introducing to or creating within a catholyte chamber of the at least one electrochemical cell a starter electrolyte composition comprising at least one target component and one or more additives, and facilitating, via the one or more additives, targeted electrochemical manipulation of the at least one target component.

A metal sulfate manufacturing system comprising an electrochemical dissolution system having, an anode electrode that holds metal raw material, a cathode electrode, an electrolyte bath having an inlet to receive an initial acid or metal-acid complex solution and an outlet to discharge the treated metal sulfate solution, stirring equipment that mixes the electrolyte bath, a temperature control system, and a rectifier that supplies current at constant voltage between the anode and cathode electrode.

A metal sulfate manufacturing system comprising an electrochemical dissolution system having, an anode electrode that holds metal raw material, a cathode electrode, an electrolyte bath having an inlet to receive an initial acid or metal-acid complex solution and an outlet to discharge the treated metal sulfate solution, stirring equipment that mixes the electrolyte bath, a temperature control system, and a rectifier that supplies current at constant voltage between the anode and cathode electrode.

Provided are nanoporous materials (including nanoporous metals) and related methods of fabricating the disclosed materials. The disclosed materials are useful in supporting chemical reactions, including the on-board production of hydrogen from water by way of contacting the water to the disclosed materials.

Provided is a method for preparing copper azide and cuprous azide encapsulated by conductive metal-organic framework. The method uses a conductive copper-containing metal-organic framework material as a precursor, and completes the azidation of the precursor by means of a liquid-solid electrochemical azidation reaction. Copper azide and cuprous azide nanocrystals are highly uniformly embedded within a conductive framework, which may effectively avoid the agglomeration of copper azide and cuprous azide, and reduce static charge generated by friction, displacement, and the like. Meanwhile, the conductive framework may promote the effective transfer of charge, avoid the accumulation of static charge, and improve the electrostatic safety. In addition, the liquid-solid electrochemical azidation reaction has advantages such as being safe and efficient, having a short reaction time and having strong operability, and the preparation process is compatible with a MEMS process, which is beneficial for the application of copper azide and cuprous azide materials in micro devices.