98 results about "Methyl orange" patented technology

The invention discloses an indium-based metal-organic framework material based on a pyridine hexacarboxylic acid ligand as well as a preparation method and application of the indium-based metal-organic framework material, the chemical formula is {[NH2Me2] 2 [In4 (mu2-O) (H6L) 2 (H2O) 2]. 3DMF. 10H2O} n, and H6L is an organic ligand 4, 4 ', 4' '-(pyridine-2, 4, 6-triyl) triisophthalic acid. The material has excellent thermal stability and chemical stability, and due to the frame charge characteristic and the excellent pore structure of the material, the metal organic frame material shows efficient dye selective adsorption and separation performance, can selectively adsorb cationic dye methylene blue MB and repel anionic dye methyl orange MO at the same time. In conclusion, a new design thought is developed for the novel indium-based metal organic framework material based on the pyridine hexacarboxylic acid ligand, and meanwhile, a new candidate is provided for developing a high-efficiency dye wastewater purification material.

The invention discloses a modified hollow cadmium sulfide photocatalytic reducing agent and a preparation method and application thereof, and belongs to the technical field of wastewater treatment.The preparation method comprises the steps that silicon dioxide microspheres and deionized water are mixed to prepare suspension liquid, a sodium citrate aqueous solution, a cadmium chloride aqueous solution, ammonia water and a thiourea aqueous solution are added into the suspension liquid, the mixture is stirred to be uniform and then heated for a reaction, and the modified hollow cadmium sulfide photocatalytic reducing agent is obtained; preparing to obtain a silicon dioxide and cadmium sulfide composite material; immersing the silicon dioxide and cadmium sulfide composite material into a sodium hydroxide solution, heating and etching to obtain nano hollow cadmium sulfide; the preparation method comprises the following steps: immersing nano hollow cadmium sulfide into a 1-octadecene solution, carrying out heating reaction, and carrying out alcohol washing and drying to obtain the modified hollow cadmium sulfide photocatalytic reducing agent. The modified hollow cadmium sulfide composite photocatalyst is synthesized through a silicon dioxide template method and a thermal decomposition method, and high-concentration methyl orange industrial wastewater can be efficiently degraded under the condition of visible light irradiation.

This invention discloses a method for preparing a silver- and aluminum-loaded attapulgite composite material and its application. The method involves mixing attapulgite with hydrochloric acid, reacting, drying, and grinding to obtain modified attapulgite. The modified attapulgite is then mixed with aluminum chloride solution and reacted, followed by drying to obtain aluminum-modified attapulgite. Silver nitrate, aluminum-modified attapulgite, and deionized water are mixed to obtain a mixed solution. KI solution is added dropwise to the mixed solution, and the mixture is stirred for 2–4 hours. After filtration, washing, drying, and grinding, a precursor material for the loaded material is obtained. This precursor material is then photoactivated in a photochemical reactor to obtain the silver- and aluminum-loaded attapulgite composite material Ag / AgI / Al. The Ag / AgI / Al material prepared by this invention exhibits good doping effects. Furthermore, in the composite material system, Ag, AgI, and Al produce a synergistic effect, resulting in a good degradation effect on methyl orange.

The application relates to the technical field of chemical composite materials, and discloses a manganese dioxide-iron oxide composite material for removing arsenic from acidic wastewater and a preparation method, wherein manganese dioxide nanotubes are first synthesized, then the manganese dioxide nanotubes are added into a solution containing iron salt and methyl orange, the black turbid solution is dried in an oven after stirring, and finally the obtained powder is heated and calcined to obtain the manganese dioxide-iron oxide composite material. The composite material can effectively adsorb arsenic in weakly acidic wastewater, and solves the problems of poor arsenic removal effect and poor material stability of single manganese dioxide and single iron oxide. Meanwhile, the composite material has low preparation cost, the preparation method is simple, special equipment is not needed, and a new method for removing arsenic from weakly acidic wastewater is provided.

The invention relates to a preparation method and application of a bio-based composite environment-friendly adsorbent, and belongs to the technical fields of biomass waste recycling, composite materials thereof, wastewater treatment and the like. The main raw material for preparing the adsorbent is derived from waste sugar filter mud in the sugar manufacturing process, and after low-energy activation treatment is conducted on the waste sugar filter mud, high-activity isocyanate and amine monomers are adopted on the surface of the waste sugar filter mud to conduct in-situ polymerization to generate polyurea; the preparation method does not need complex equipment and expensive reagents, is simple in process, low in reaction energy consumption and suitable for large-scale industrial production, and opens up a new path for the development of circulating biological economy; according to the prepared adsorbent, after five continuous adsorption-desorption cycles, the removal rate of Cd (II) and Pb (II) is still kept at 85% or above, and the decolorization rate of methyl orange dye is 96% or above, so that the adsorbent has high-efficiency treatment capacity on a heavy metal and dye pollution system, and a technical scheme with extremely high competitiveness is provided for deep treatment of industrial wastewater and environmental ecological restoration.

This invention belongs to the field of lithium battery material technology, specifically relating to a metal oxide / mesoporous manganese dioxide / conductive polymer composite material, its preparation method, and its application. The preparation method includes the following steps: 1) ball milling a commercial metal oxide; 2) mixing the metal oxide powder with an organic polymer monomer and a methyl orange solution and ultrasonically dispersing the mixture to obtain a liquid mixture; 3) adding a potassium permanganate solution to the liquid mixture and performing a high-pressure hydrothermal reaction under stirring to obtain the composite material; 4) subjecting the composite material to alkali treatment, filtering, washing with water, and drying to obtain the metal oxide / mesoporous manganese dioxide / conductive polymer composite material. This metal oxide / mesoporous manganese dioxide / conductive polymer composite material can be used to prepare lithium battery cathode materials with high specific capacity, high conductivity, and high stability in a simple, efficient, and low-cost manner. It is easy to industrialize and solves the problems of low conductivity and poor rate discharge performance of traditional metal oxide cathode materials.

The invention relates to a metal organic framework for improving charge separation efficiency based on a conjugated benzene ring, a preparation method thereof and application of the metal organic framework in degradation of methyl orange. The invention relates to a complex of MOF-2 [Zn8 (NDC) 8 (TRZ) 8] n, in which NDC is 2, 6-naphthalenedicarboxylic acid, and TRZ is 1, 2, 4-triazole, and a preparation method of the complex of MOF-2 [Zn8 (NDC) 8 (TRZ) 8] n. The extended pi conjugation in MOF-2 results in significant improvements, including reduced band gap, enhanced visible light absorption, and more excellent charge separation efficiency, as proved by comprehensive ultraviolet-visible spectroscopic analysis, electrochemical analysis, and valence band-XPS measurements. 83.8% of methyl orange degradation is realized by the MOF-2 under the irradiation of visible light within 30 minutes. According to mechanism research performed by using a free radical capture technology and electron spin resonance (ESR) spectroscopy, superoxide free radicals (. O2 <->), singlet oxygen (1O2) and hydroxyl free radicals (. OH) are determined as main active species.

The application relates to the technical field of complex nanomaterials, in particular to a preparation method of an indium complex nanomaterial, the obtained material and application thereof. The application discloses a preparation method of an indium complex nanomaterial, which comprises the following steps: adding inorganic indium salt and 5-bromoisophthalic acid into N,N-dimethylformamide to obtain a transparent reaction liquid; carrying out a solvothermal reaction on the reaction liquid in a reaction kettle; cooling the reaction kettle after the solvothermal reaction, and separating to obtain a solid crude product; washing the solid crude product, drying, and obtaining the indium complex nanomaterial. The application also discloses the indium complex nanomaterial prepared by the above preparation method and application of the indium complex nanomaterial in adsorption of organic dye wastewater. The indium complex nanomaterial prepared by the application has excellent adsorption performance on Congo red dye in a water environment, and also has certain adsorption performance on rhodamine B and methyl orange, and has relatively high practical application value in treatment of organic dye wastewater containing Congo red dye.

The invention relates to a modified charcoal electrode for electro-adsorption and a preparation method thereof, and the preparation method comprises the following steps: taking rice husk as a biomass raw material, preparing rice husk charcoal (RHAC) through potassium hydroxide activation and high-temperature pyrolysis, mixing with an adhesive, a conductive agent and an organic solvent, and coating on foamed nickel to prepare the rice husk charcoal electrode. Compared with rice husk charcoal (RHC) which is not activated by potassium hydroxide, the RHAC has higher specific surface area and pore volume and shows more excellent adsorption performance. An electro-adsorption test result shows that the removal rate of the modified biochar electrode on methyl orange dye is obviously higher than that of conventional adsorption under the dual action of an electric field and biochar. The preparation method of the modified biochar electrode provided by the invention is simple, simple and convenient to operate and low in cost; the modified biochar electrode provided by the invention has a remarkable electro-adsorption effect on azo dyes, is high in reusability and has a good application prospect.

This invention discloses a method for preparing porous carbon materials. First, the reactants undergo in-situ oxidative polymerization in a solution of methyl orange and ferric chloride to generate a polymer precipitate. The polymer precipitate is washed with acid and water, and dried to obtain polymer powder. Then, the polymer powder is mixed uniformly with a molten salt system in a predetermined ratio to obtain a mixture. Under an inert atmosphere, the mixture is heated to 400°C for pre-carbonization for 1-4 hours at a heating rate of 2-10°C / min, and then heated to 600-1000°C for carbonization for 1-4 hours. After the reaction is completed, residual salts are removed by washing with acid and water, and the porous carbon material is obtained after drying.

This invention relates to the field of fluorescence detection technology, specifically disclosing a dual-colorimetric fluorescent probe for detecting methyl orange, its preparation method, and its application. The probe is prepared by in-situ synthesis of carbon dots and copper nanoclusters. The carbon dots are synthesized from Bermuda grass as a precursor via a hydrothermal method, and the copper nanoclusters are obtained by reducing copper ions with penicillamine and bovine serum albumin as dual stabilizers. The dual-colorimetric fluorescent probe provided by this invention has a detection limit for methyl orange as low as 0.06 μM, exhibiting good selectivity, stability, and anti-interference ability. It can be applied to the spiked recovery detection of methyl orange in actual water samples and can achieve visualized semi-quantitative analysis through filter paper loading, making it suitable for rapid on-site screening.

The application discloses a kind of Graphene Oxide / Bi 12 TiO 20 Preparation method and application of composite photocatalyst, to solve the existing Bi 12 TiO 20 Photocatalyst photo-generated carrier is fast, and it is easy to produce miscellaneous phase in preparation, leading to the technical problems such as low catalytic activity. First, Bi 12 TiO 20 Powder, such as Bi / Ti=4:1 or 6:1, then the Bi 12 TiO 20 Powder is compounded with single-layer GO dispersion under the action of ultrasonic wave. The Graphene Oxide / Bi 12 TiO 20 Composite photocatalyst prepared by the method is mixed with methyl orange (MO) solution under simulated visible light for 20 minutes, and the degradation rate of methyl orange reaches 98.2%, and the first-order kinetic reaction rate constant k value is 0.2167 min ‑1 , which can be widely applied in the field of visible light catalytic degradation of organic pollutants.

The present invention belongs to the technical field of photocatalytic materials, and provides a V2CMXene photocatalyst composite material, a preparation method thereof and an application. V2CMXene has a unique accordion-like nanosheet structure and excellent cocatalyst potential; under light illumination, g-C3N4 absorbs a part of visible light to obtain sufficient energy (E≤hv), and can generate some photo-generated carriers. Doping V2CMXene can promote the transfer of the generated photo-generated carriers and inhibit the rapid recombination between electron-hole pairs (e ‑ -h + ). Therefore, the photo-generated carriers on the conduction band (CB) of g-C3N4 can rapidly transfer to the surface of V2CMXene. Then, these transferred photo-generated electrons further react with organic molecules to generate ·OH and CO2. The data of the examples show that the obtained photocatalyst composite material has a catalytic rate of up to 99.3% for methyl orange dye within 120 min.

The invention discloses a dosage calculation method for reducing sewage hardness through a dual-alkali method. The method comprises the specific calculation steps that 1, the total hardness and calcium hardness of sewage are measured; 2, calculating the magnesium hardness; step 3, determining phenolphthalein alkalinity and methyl orange alkalinity of the sewage; 4, calculating the concentrations of hydroxide, carbonate and bicarbonate; step 5, setting a double-alkali excess amount; step 6, calculating the dosage of NaOH; and step 7, calculating the dosage of Na2CO3. Compared with the prior art, the method has the advantages that the calculation precision is high: based on the actual ion concentration (calcium and magnesium hardness and alkalinity) of the sewage and a clear chemical reaction metering relationship, the blindness of a trial and error method is avoided, the dosage can be accurately controlled, and the risk of agent waste (cost reduction) or substandard hardness reduction (membrane scaling prevention) is reduced; the response speed is high; the operation is simple; the economical efficiency is good; the applicability is wide.

The invention relates to the technical field of metal organic framework materials, particularly discloses a fluorescent chiral Cd-MOF sensor and also discloses application of the fluorescent chiral Cd-MOF sensor. The fluorescent chiral Cd-MOF sensor provided by the invention is prepared by taking cadmium chloride and 1, 4-naphthalic acid as raw materials through a solvothermal method. The sensor has an excellent fluorescence luminescence property, and can detect methyl orange based on the fluorescence intensity of the sensor.

This invention relates to the field of photoelectrocatalytic material preparation technology, specifically to a Bi2O2S / N-BiVO4 photoanode and its preparation method and application; including the following steps: (1) preparation of Bi2O2S; (2) preparation of BiVO4; (3) preparation of N-BiVO4, wherein the BiVO4 photoanode prepared in step (2) is placed in an ammonia protective atmosphere and calcined; (4) preparation of Bi2O2S / N-BiVO4 photoanode, wherein an ethanol solution of Bi2O2S is dropped onto the surface of N-BiVO4 obtained in step (3), the N-BiVO4 loaded with the solution is spin-coated, and then the electrode is heat-treated to obtain the Bi2O2S / N-BiVO4 photoanode; in the experiment of photoelectrocatalytic degradation of methyl orange, the Bi2O2S / N-BiVO4 photoanode of this invention showed a high degradation rate of 99.62%.

The application discloses a luminescent coordination polymer crystal material based on a tetraphenylethylene pyridine ligand and a preparation method and application thereof, the chemical formula of the luminescent coordination polymer crystal material is [Cu(L)SCN.DMSO]n, wherein L is a 4.4'-[(2,2-diphenyl ethylene)di-4.1-phenylene]bis[pyridine] ligand, and n is an arbitrary value; wherein a Cu ion forms a two-dimensional structure with the 4.4'-[(2,2-diphenyl ethylene)di-4. n The crystal material can be used for fluorescence quenching detection of water-phase methyl orange; compared with the prior art, the crystal material is simple and reliable in application, the quenching constant of the crystal material for detecting water-phase methyl orange is as high as 1.9*10 6 M ‑1 , and the detection limit is as low as 0.019 mu M, so the crystal material is a luminescent coordination polymer crystal material for extremely sensitive detection of methyl orange at present and has a wide application prospect.

The application discloses a kind of dual-wavelength ultraviolet light synergistic ozone micro-nano bubble treatment methyl orange wastewater method, belong to wastewater treatment technical field.The method is first to the micro-nano bubble generator is carried out organic solvent ultrasonic cleaning, deionized water flushing and drying pretreatment, then preparation ozone micro-nano bubble water, finally under the condition of stirring ozone micro-nano bubble water is mixed with methyl orange solution, through UV-222 and UV-254 dual-wavelength ultraviolet lamp irradiation realizes methyl orange degradation.The application combines the synergistic effect of ozone micro-nano bubble and dual-wavelength ultraviolet light, strengthens hydroxyl radical generation and organic matter photolysis, improves methyl orange decolorization and mineralization efficiency, can also photolyze debromination to avoid bromate byproduct, whole process does not need to add reagent, no sludge is generated, equipment system is simple and easy to control, applicable to the treatment of methyl orange azo dye wastewater, with good engineering application value.

The invention discloses a preparation method, a product and application of a Co / CN coated SiO2 composite material, and belongs to the technical field of wastewater treatment. The Co / CN coated SiO2 composite material comprises a silicon dioxide carrier, cobalt nanoparticles loaded on the carrier and a carbon nitrogen layer coated on the surfaces of the cobalt nanoparticles. The preparation method comprises the following steps: firstly, preparing the silicon dioxide carrier; and mixing cobalt nitrate hexahydrate, the silicon dioxide carrier and a buffer solution, stirring, adding dopamine, reacting at room temperature to obtain a black brown product, washing, and calcining in an inert atmosphere to obtain the Co / CN coated SiO2 composite material. The material can efficiently catalyze and degrade organic dyes such as bisphenol A, methyl orange and the like in the presence of peroxymonosulfonate, has the advantages of mild reaction conditions, high catalytic activity, good stability and the like, and is suitable for treating organic polluted wastewater.

The invention belongs to the technical field of solid ultrasonic catalysis, and particularly relates to an Ag2O / ZnMoO4 composite acoustic catalyst as well as a preparation method and application thereof. According to the Ag2O / ZnMoO4 composite acoustic catalyst, the mass ratios of Ag2O in the Ag2O / ZnMoO4 composite acoustic catalyst are 3%, 5%, 7% and 10% respectively. The Ag2O / ZnMoO4 composite acoustic catalyst provided by the invention has a synergistic effect with potassium persulfate to ultrasonically catalyze and degrade organic dye, the degradation effect is good, equipment is simple, and the method is environment-friendly. By utilizing the method, the degradation rates of methyl orange, Congo red, tetracycline, golden orange II and rose-bengal B in water can reach 89.14%, 88.01%, 76.70%, 54.16% and 94.82% respectively in 5 minutes.

This invention belongs to the field of nanofiltration membrane technology, and particularly relates to a polyamide nanofiltration membrane, its preparation method, and its application. The polyamide nanofiltration membrane provided by this invention includes an ultrafiltration membrane and a polyamide selective layer attached to the ultrafiltration membrane. The polyamide selective layer is formed by a polycondensation reaction of a fully amino columnar aromatic hydrocarbon [5] and 1,3,5-benzenetricarboxyl chloride. The polyamide nanofiltration membrane of this invention can separate organic micropollutants such as Congo red, Rhodamine B, methylene blue, and methyl orange dyes, with a rejection rate of more than 95%. It also has good separation performance for some inorganic salts, with a rejection rate of more than 50%. The polyamide nanofiltration membrane of this invention can adapt to some harsh acid and alkali environments while maintaining excellent rejection performance. The polyamide nanofiltration membrane provided by this invention also has excellent antifouling performance.

The invention discloses a temperature-sensitive chitosan and nano magnetite composite material as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic materials. The method comprises the following steps: S1, dissolving a chitosan material in an organic solvent I, and adding 2-bromoisobutyryl bromide for reaction in a protective gas atmosphere to obtain brominated chitosan; adding brominated chitosan and a temperature-sensitive monomer into an organic solvent II, adding a transition metal catalyst, and reacting to obtain temperature-sensitive chitosan; s2, adding a trivalent iron salt and a divalent iron salt into an acetic acid solution to obtain an iron salt solution, and then adding temperature-sensitive chitosan and glycerol to obtain a mixed solution; and S3, dropwise adding the mixed solution obtained in the step S2 into an ethanol water solution of sodium hydroxide to obtain the temperature-sensitive chitosan and nano magnetite composite material. The composite material prepared by the invention has high catalytic degradation rate on methyl orange and rhodamine, and can realize the effect of efficiently catalyzing and degrading organic pollutants in wastewater.

The present invention relates to the field of metal-organic framework materials technology, specifically disclosing a fluorescent chiral Cd-MOF sensor and its applications. The fluorescent chiral Cd-MOF sensor provided by the present invention is prepared using cadmium chloride and 1,4-naphthalenedicarboxylic acid via a solvothermal method. The sensor exhibits excellent fluorescence properties and can detect methyl orange based on its fluorescence intensity.

This invention discloses a chlorine-doped carbon dot-modified carbon nitride material, its preparation method, and its applications, belonging to the field of photocatalyst materials technology. The invention uses mulberry twig powder as raw material, disperses it in water, adds thionyl chloride, mixes it, and heats it to 180-200℃ for 10-12 hours to prepare chlorine-doped carbon dots. After filtration and purification, chlorine-doped carbon quantum dot materials, denoted as Cl-CQDs, are obtained. A certain amount of urea and Cl-CQDs powder are dissolved, mixed, dried to remove moisture, and the dried powder is calcined in a tube furnace to obtain chlorine-doped carbon dot-modified carbon nitride material, labeled Cl-CTCN. The preparation method of this invention is simple, convenient to operate, has mild reaction conditions, and low raw material cost, making it suitable for large-scale industrial production. The Cl-CTCN of this invention has good photocatalytic performance, good recyclability, and can be applied to the photocatalytic degradation of organic pollutants such as tetracycline, rhodamine B, and methyl orange, as well as photocatalytic water splitting for hydrogen production, demonstrating broad applicability.

The invention discloses a manganese oxide doped ZIS photocatalytic material and a preparation method and application thereof.The preparation method comprises the following steps that ZnCl2, InCl3. 4H2O and C2H5NS are dissolved in deionized water, then solid manganese oxide is added, ultrasonic treatment is performed after magnetic stirring, reaction is performed for 10-20 h at the temperature of 60-150 DEG C after uniform dispersion, cleaning and drying are performed, and the manganese oxide doped ZIS photocatalytic material is obtained. According to the invention, the Mn-doped ZIS is realized by decomposing the solid manganese oxide for the first time; the doping mode can slowly release doping elements, so that the doping process is controlled, and the doping is more uniform; in addition, more Mn elements can be introduced; the degradation effect of the prepared photocatalytic material on methyl orange is greatly improved; and the bacillus subtilis can be used for degrading and sterilizing organic matters in a water body, so that a new way is provided for marine organism fouling prevention and treatment.

The application provides a Cu2O / SiC / g-C3N4 ternary composite material and a preparation method and application thereof, and relates to the technical field of catalysts.The p-n junction is constructed between Cu2O and g-C3N4, and the Z-scheme heterojunction is constructed between Cu2O and SiC, the two mechanisms synergistically act, can effectively promote the separation of electrons and holes from the Cu2O photocatalyst, form an equivalent wide band gap, fully utilize the strong oxidizing property of the valence band of SiC and the strong reducing property of the conduction band of Cu2O, thereby greatly improving the photocatalytic performance;the proportion of the Cu2O / SiC / g-C3N4 ternary composite material prepared by the application as a photocatalyst in degrading methyl orange water pollutants within 110min can reach 93.70%.The preparation method of the application can realize the compounding of the three materials by adopting two simple processes of calcination and hydrothermal treatment, has the advantages of less raw materials, simple synthesis process and good repeatability, also has the basic conditions of large-scale production, and higher application potential and use value.

This invention discloses a bismuth oxide composite sponge-supported photocatalyst, its preparation method, and its application, belonging to the technical field of photocatalytic wastewater treatment. This invention uses bismuth oxide and melamine sponge as the catalyst and support, respectively, through Ca... 2+ Crosslinking anchors bismuth oxide in a sodium alginate gel network, which is then loaded onto a melamine sponge framework, forming a three-in-one functional interface of "adsorption-enrichment-catalysis". This effectively combines the excellent adsorption performance of melamine sponge, the chelating enrichment capacity of sodium alginate, and the photocatalytic activity of bismuth oxide. Relying on the synergistic coupling effect of adsorption and photocatalysis, the pollutant removal efficiency is significantly improved, thereby achieving the goal of economical, efficient, rapid, thorough, and harmless treatment of methyl orange and hexavalent chromium wastewater.

The invention belongs to the technical field of organic matter degradation, and discloses application of a nano-silver catalyst in organic dye catalytic degradation. According to the invention, methylene blue, methyl orange, p-nitroaniline and p-nitrophenol are taken as examples for experiments, and the four dyes start to degrade after reacting for a period of time. In the four dyes, the catalytic effect of methylene blue is worst, and the degradation degree within 20 minutes after the nano-silver catalyst synthesized by biotransformation of the blue-like bacteria FL15 is added can reach the degradation degree of reaction for 6 hours when the catalyst is not added; the effect of catalyzing the degradation of methyl orange is the best, and the degradation rate can reach 95% or above within 10 min; the degradation rate of paranitroaniline and paranitrophenol can reach 95% or above within 20 min. Therefore, the activity of the AgNPs mediated and synthesized by the endophytic fungi FL15 is relatively strong.

The application discloses a preparation method of a bismuth sulfide nanorod / bismuth oxybromide composite photocatalytic material. The method adopts a hydrothermal method, first prepares a bismuth sulfide precursor, and then grows the bismuth sulfide nanorod / bismuth oxybromide composite material through hydrothermal growth after the bismuth sulfide precursor is uniformly stirred with bismuth nitrate pentahydrate and sodium bromide. The composite material has a unique nano structure and good photocatalytic performance by adjusting the mass of the bismuth sulfide precursor in the composite material. When 2 mmol of bismuth oxybromide and 0.05 g of the bismuth sulfide precursor are used to hydrothermally synthesize the bismuth sulfide nanorod / bismuth oxybromide composite material, the composite material has the optimal rhodamine B removal performance, and the removal rate can reach 99.2% after 30 min of dark adsorption and 15 min of photocatalytic reaction; meanwhile, the bismuth sulfide nanorod / bismuth oxybromide composite photocatalytic material also has good removal effects on tetracycline, methyl orange and other organic pollutants.