69results about How to "The preparation process is environmentally friendly and pollution-free" patented technology

The invention relates to a method for synthesizing nitrogen-doped graphene hydrogel in one step and using nitrogen-doped graphene hydrogel for electrically adsorbing heavy metal ions in water. The method comprises the following steps of preparing nitrogen-doped graphene hydrogel and nitrogen-doped graphene hydrogel paper electrodes, and adsorbing and desorbing the heavy metal ions in the water by regulating and controlling voltage on the electrodes. The nitrogen-doped graphene hydrogel has the advantages that the preparing method of the nitrogen-doped graphene hydrogel is simple and easy to implement, the preparation process is environmentally friendly and free from pollution, the electrodes modified by the hydrogel are high in efficiency and speed of adsorbing the heavy metal ions in the water, and easy to operate, and the recycling performance of the hydrogel is greatly improved compared with that of materials in the past.

The invention relates to preparation of a chitosan-carbon quantum dot composite film modified electrode and an application of the chitosan-carbon quantum dot composite film modified electrode to electrochemical identification of a tryptophan enantiomer. A method for identifying the tryptophan enantiomer comprises the following steps: preparing carbon quantum dots, preparing the chitosan-carbon quantum dot composite film modified electrode, and identifying the tryptophan enantiomer with an electrochemical method. The preparation and the application have the benefits that a preparation method of the chitosan-carbon quantum dot composite film modified electrode is simple, convenient and feasible, a preparation process is environment-friendly and pollution-free, and the identification efficiency of the composite film modified electrode to the tryptophan enantiomer is greatly improved in comparison with that of a chitosan modified electrode to the tryptophan enantiomer.

The invention discloses a ZnSe quantum dot and xanthan gum nanocomposite, an electrode for detecting Cd<2+> and / or Cu<2+> and a method for detecting the Cd<2+> and / or Cu<2+>, and belongs to the technical field of electrochemical analysis detection. The ZnSe quantum dot and xanthan gum nanocomposite is prepared from a xanthan gum solution and ZnSe quantum dots (ZnSe QDs) under the action of ultrasonic dispersion. A preparation method of an electrode modified by the ZnSe quantum dot and xanthan gum nanocomposite comprises: dispensing a solution of the ZnSe quantum dot and xanthan gum nanocomposite to the surface of an MWCNT / GC electrode; carrying out drying to prepare the electrode. The ZnSe quantum dot and xanthan gum nanocomposite, the electrode and the method which are disclosed by the invention have the beneficial effects that: the ZnSe quantum dot and xanthan gum nanocomposite is simple in preparation method and has no pollution, and the prepared composite modified electrode can implement simultaneous and respective detection on cadmium and copper ions; a chemical sensor using the electrode has the advantages of high stability, good reproducibility, high interference resistance, low detection limit and the like.

The invention discloses a trimming and shaping die for combined type automobile parts. The trimming and shaping die comprises the following raw materials in percentage by weight: 1.8%-3.2% of Al, 1%-2% of Zn, 1.2%-1.8% of Zr, 2.8%-5.5% of Ni, 0.3%-0.8% of Mn, 3%-6.8% of Sn, 0.2%-0.35% of P, 2.2%-3% of Si, 0.1%-0.3% of rare earth, 2.8%-3.5% of an additive and the balance of Cu. The trimming and shaping die for combined type automobile parts provided by the invention has the benefits as follows: both the rigidity and strength are high, the wear resistance and fatigue resistance are good, and the toughness is high; besides, the formula is reasonable, the combination property of the obtained trimming and shaping die is effectively ensured by strictly controlling the raw material ratio, the production cost is controlled, the preparation method is simple, the service life of the obtained trimming and shaping die is long, the trimming and shaping die is used for the processing of combined type automobile parts, the precision is high, the passing rate of finished products is high, and the trimming and shaping die is worth to be popularized.

The invention discloses a thermal insulation wall material and a manufacturing process thereof. The thermal insulation wall material is prepared from, by weight, 200-250 parts of inorganic raw materials, 3.8-21.4 parts of polystyrene particles and 63-250 parts of water. A mixture of the raw material compositions is pressurized and heated in a mold, and demolding is conducted. The thermal insulation wall material product is high in compressive strength, fireproof and good in thermal insulation performance.

The invention relates to a method for removing hard calcium ions in water through an S element modified graphene electrode. The method comprises the following steps: preparing sulfur-doping graphene aerogel, preparing a sulfur-doping graphene aerogel paper electrode, and adsorbing different calcium ions through the paper electrode under a three-electrode system. The method for removing the hard calcium ions in the water through the S element modified graphene electrode has the beneficial effects: the preparation method of the sulfur-doping graphene aerogel is simple, convenient and feasible, the preparation process is environmentally-friendly without pollution, the electrode modified by those materials has high adsorption efficiency and speed to the calcium ions in the water and has simple and convenient adsorption operations, and a hardness problem of the water can be effectively reduced.

The invention relates to sulfur-doped graphene aerogel synthesized by a one-step method and electric adsorption removal of the sulfur-doped graphene aerogel on various heavy metal ions. The sulfur-doped graphene aerogel is prepared through the following steps that the sulfur-doped graphene aerogel is prepared; a sulfur-doped graphene aerogel paper electrode is prepared; different heavy metal ions are adsorbed through paper electrodes under a three-electrode system. The sulfur-doped graphene aerogel has the beneficial effects that the preparation method of the sulfur-doped graphene aerogel is simple and convenient; the implementation is easy; the environment-friendly and pollution-free effects are achieved in the preparation process, so that the electrode modified by the materials has high adsorption efficiency and high speed on the heavy metal ions in the water; the operation is simple and convenient; the electric adsorption effect on different heavy metal ions are compared.

The invention discloses an electrochemical sensor capable of simultaneously detecting glucose and uric acid, and belongs to the technical field of detection. Through pretreatment of the sensor electrode, the surface of the sensor electrode is rich in-OH groups, and the cleaning and activating capability of the electrode is improved. In the modification material of the sensor electrode, the gold nanoparticles have large specific surface area and excellent conductivity and catalytic ability, the catalytic ability to glucose or uric acid is enhanced, the gradient polyacrylamide gel realizes enrichment and separation of the to-be-detected substance glucose or uric acid, quantitative detection of a single component can be realized, and the specific surface area of the to-be-detected substance glucose or uric acid is increased. The sensor test paper can be used for simultaneously detecting two components, solves the technical problem that commercial sensor test paper cannot be used universally, provides more thoughts for medical diagnosis methods, and has a very wide application prospect.

The invention discloses an electrochemical sensor capable of simultaneously detecting glucose and uric acid, which belongs to the technical field of detection. The invention makes the surface of the sensor electrode rich in -OH groups through the pretreatment of the sensor electrode, so as to improve the cleaning and activation ability of the electrode. Among the modified materials for sensor electrodes, gold nanoparticles have a large specific surface area, excellent electrical conductivity and catalytic ability, which can enhance the catalytic ability to glucose or uric acid, and the gradient polyacrylamide gel can realize the enrichment of the analyte glucose or uric acid The role of separation can not only realize the quantitative detection of a single component, but also realize the simultaneous detection of two components, which solves the technical problem that commercial sensor test paper cannot be used universally, provides more ideas for medical diagnostic methods, and has a wide range of applications. Application prospects.

The invention discloses an adhesive for dye-sublimation transfer printing, and a synthesis process thereof. The adhesive comprises the following components in parts by weight: 40-60 parts of bisphenol-A epoxy resin, 10-20 parts of polyurethane resin, 3-8 parts of flexibilizer, 3-8 parts of sodium acrylate, 3-10 parts of glycerol, 5-12 parts of ethylene-vinlacetate copolymer, 5-12 parts of oil-absorbing filler, 3-8 parts of organic bentonite, 4-10 parts of kaolin, 2-8 parts of antioxidant, 5-15 parts of ethylene glycol and 1-4 parts of nano-silicon dioxide. The preparation method disclosed by the invention is simple, and environment-friendly and pollution-free in preparation process; and the prepared adhesive is high in adhesion force, and excellent in high-temperature resistance and scratch resistance.