6 results about "Periodate" patented technology

The invention relates to a 1D / 2D dual-heterojunction catalyst, a preparation method thereof and application of the 1D / 2D dual-heterojunction catalyst in photo-assisted periodate activated degradation of bisphenol A. The preparation method comprises the following steps: mixing a concentrated hydrochloric acid solution with LiF, adding Ti3AlC2, carrying out a heating reaction, carrying out solid-liquid separation to obtain a solid phase, washing the solid phase to be neutral, and dispersing the solid phase in ethanol to obtain an MXene ethanol solution; adding a cerium source aqueous solution into an MXene ethanol solution, mixing, and placing in liquid nitrogen to obtain a mixed solution; mixing an organic ligand, ethanol and pure water to obtain a mixed solution, carrying out a mixed heating reaction on the mixed solution and the mixed solution, carrying out solid-liquid separation to obtain a precipitate, and freeze-drying to obtain powder; and heating and calcining the obtained powder in an inert atmosphere to obtain the 1D / 2D dual-heterojunction catalyst. According to the invention, photogenerated electron-hole recombination is effectively inhibited by constructing double heterojunctions, and ultrafast electron transfer is realized at the same time, so that the oxidation effect is enhanced, and the efficient photocatalytic activity of '1 + 1gt, 2' is realized.

The invention belongs to the technical field of iodine removal of light salt brine, and particularly relates to a method for removing high-valence iodine in ionic membrane caustic soda light salt brine. Comprising the following steps: (1) adding a pH regulator and sodium sulfite into light salt brine, regulating the pH to 1-3, stirring until the reaction is completed, and carrying out primary adsorption deiodination by adopting a composite adsorbent to obtain light salt brine 1; and (2) adding a pH regulator and hydrogen peroxide into the light salt brine 1, regulating the pH value to 1-2, stirring until the reaction is completed, and carrying out secondary adsorption by adopting a composite adsorbent to remove iodine, thereby obtaining the deiodinated light salt brine. According to the removal method disclosed by the invention, high-valence iodine such as periodate and iodate in the light salt brine is converted into low-valence iodine such as iodate and iodide ions by utilizing the reducibility of sodium sulfite and the oxidation-reduction property of hydrogen peroxide in the coexistence of iodide ions and iodate, and then is further converted into simple substance iodine, and the simple substance iodine is efficiently removed by utilizing a composite adsorbent; the process is simple, the cost is low, the removal rate is high, and the removal effect is good.

This invention belongs to the field of wastewater treatment technology, specifically relating to a method for degrading phthalic acid ester pollutants using photo-activated periodate. The method involves adding periodate to the reaction system and applying light irradiation. Under light, periodate continuously generates various free radicals, which can attack phthalic acid esters, achieving efficient degradation. Compared with existing advanced oxidation technologies, this invention does not require high-energy ultraviolet light sources or additional catalysts. The reaction conditions are mild, energy consumption is low, and the process is simple. It is suitable for the removal of phthalic acid ester pollutants from industrial wastewater, domestic sewage, and surface water, and has promising engineering application prospects.

This invention discloses a method for removing oxytetracycline from water using boron nitride-modified copper ferrite-activated periodate. The catalytic material uses copper ferrite as the main material and boron nitride as a modifying material, wherein the mass ratio of boron nitride to copper ferrite is 1:5–20. The catalytic material used in this invention promotes charge transfer through surface support and the formation of interfacial Fe-N bonds, thereby achieving excellent oxytetracycline removal performance. The method for removing oxytetracycline from water using boron nitride-modified copper ferrite-activated periodate described in this invention has advantages such as low cost, simple operation, stable catalytic performance, wide applicable pH range, strong anti-interference ability, and high oxytetracycline removal efficiency, and has a promising application prospect for oxytetracycline wastewater treatment.

This invention discloses an orbital-controlled α-MnO2@CNT hybrid and its selective generation of IO3 upon activation of periodate (PI). • Applications in [the field]. This hybrid material uses α-MnO2 nanoribbons as the active component and CNTs as the electron reservoir, and is prepared via a one-step co-precipitation method. The CNTs and α-MnO2 form an interfacial hybrid structure, which can modulate the electronic state density of the Mn 3d orbitals, shifting the Mn d-band center upwards and enhancing PI adsorption and interfacial electron transfer efficiency. When this hybrid material is added as a catalyst to water containing PI and mixed pollutants, it can selectively generate IO3-. • Main, 1 O2 is a secondary active species, enabling the simultaneous and efficient degradation of mixed pollutants, including sulfonamide antibiotics and Rhodamine B. This invention features a simple and low-cost preparation process, a catalyst with good stability and strong anti-interference ability, wide applicability, and no formation of toxic iodides, providing a new technical solution and theoretical support for the remediation of complex water bodies.

The invention discloses a method for degrading organic pollutants by activating periodate through surface engineering modified hematite. The catalytic material is prepared by calcining manganese-doped iron oxyhydroxide serving as a precursor in an ammonia atmosphere generated by urea pyrolysis, the molar ratio of manganese to iron is 1: 9, and the mass ratio of the manganese-doped iron oxyhydroxide precursor to urea is 1: (1-7). According to the catalytic material, adsorption and charge transfer of periodate are promoted by constructing asymmetric oxygen vacancies and Fe-interstitial N double active sites, so that efficient degradation of organic pollutants is realized. The method disclosed by the invention has the advantages of low cost, simplicity and convenience in operation, environmental friendliness, stable catalytic performance, high organic matter removal efficiency, great practical application potential and the like, and has a wide application prospect in the field of organic wastewater treatment.