Mixing equipment for biosynthesis of metal nanomaterials

Abstract

The invention provides mixing equipment for biosynthesis of a metal nano material. The mixing equipment comprises a biosynthesis cavity and a mixing cavity arranged in the biosynthesis cavity, a metal ion solution for biosynthesis is placed in the biosynthesis cavity; the mixing cavity is composed of a net plate cavity and a top frame plate, biological raw materials to be synthesized, such as microbial thalli and plant tissues, are placed in the mixing cavity, two biological mixing mechanisms are further movably installed in the mixing cavity, material mixing rods and material crushing rods are arranged in the biological mixing mechanisms, material crushing treatment of the biological raw materials is completed through the material crushing rods, and the material crushing rods are movably installed in the mixing cavity. And the mixing treatment of the biological raw materials and the metal ion solution is completed through the mixing rod. According to the device, mixing treatment of biological raw materials and metal ion solutions can be completed through the material mixing rods, so that the contact efficiency of the biological raw materials and metal ions in the mixing cavity can be improved, and full reaction of the biological raw materials and the metal ion solutions is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of nano material biosynthesis equipment, and in particular relates to a mixing equipment for biosynthesis of metal nano materials. Background Art

[0002] Metal nanomaterials are widely used in biomedicine, environmental management, energy conversion and other fields due to their unique optical, electrical and catalytic properties. Traditional chemical synthesis requires the use of strong reducing agents, such as sodium borohydride, which easily introduces toxic impurities and causes serious environmental pollution. Biosynthesis, on the other hand, uses biomolecules in microorganisms or plant extracts, such as enzymes, polysaccharides, and polyphenols, as reducing agents to convert metal ions, such as Ag, into + 、Au 3+ and Pt 4+ Reduction to nanoparticles offers advantages such as environmental friendliness and good biocompatibility. However, existing biosynthesis processes suffer from low reaction efficiency and poor product uniformity. On the one hand, insufficient release of reducing agents from biological raw materials, such as microbial flora and plant tissues, results in a slow rate of metal ion reduction. On the other hand, uneven mixing of biological raw materials and metal ion solutions causes localized reaction variations, resulting in large fluctuations in nanoparticle size and morphology. Furthermore, biosynthesis is sensitive to conditions such as temperature and gas atmosphere, and existing equipment lacks precise control capabilities, further limiting synthesis efficiency and product stability.

[0003] The key to efficiently synthesizing metal nanomaterials using biological systems lies in improving the contact efficiency between bioreductants and metal ions, but existing equipment lacks targeted mixing and regulation mechanisms.

[0004] Based on this, a hybrid device for the biosynthesis of metal nanomaterials was proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a mixing device for biosynthesis of metal nanomaterials in view of the above-mentioned deficiencies in the prior art, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a mixing device for biosynthesis of metal nanomaterials, comprising a biosynthesis chamber and a mixing chamber arranged in the biosynthesis chamber; The biosynthesis chamber is a hollow chamber with an opening at the top, a sealing cover plate is clamped at the opening, and a metal ion solution for biosynthesis is placed in the biosynthesis chamber; the mixing chamber is composed of a mesh plate chamber and a top frame plate, the mesh plate chamber is specifically a rectangular chamber with an open top made of steel mesh, a top frame plate is fixed on the top of the mesh plate chamber, biological raw materials to be synthesized are placed in the mixing chamber, and hinge seats are symmetrically installed on both sides of the top of the top frame plate. Hydraulic cylinders are also installed on both sides of the top of the biosynthesis chamber, and the telescopic shafts of the hydraulic cylinders extend into the biosynthesis chamber, and the telescopic shafts of the hydraulic cylinders are rotatably connected in the hinge seats, so that the mixing chamber is movably connected in the biosynthesis chamber through the hydraulic cylinders; Two biological mixing mechanisms are movably installed in the mixing chamber. The biological mixing mechanisms are provided with mixing rods and crushing rods. The crushing rods are used to crush the biological raw materials, and the mixing rods are used to mix the biological raw materials with the metal ion solution.

[0007] As a further explanation of the present invention, the sealing cover plate is provided with a pressure relief valve, an exhaust panel and a pressure monitoring head. The pressure monitoring head is used to monitor the air pressure value in the inner cavity of the biosynthesis chamber. The pressure relief valve is used to perform pressure relief when the inner pressure of the biosynthesis chamber exceeds a set value. The exhaust panel is used to discharge the gas generated during the biosynthesis process.

[0008] As a further explanation of the present invention, a support frame is fixed to the outer bottom end of the biosynthesis cavity, the bottom end of the biosynthesis cavity is an inward-closed opening, and a liquid intake port is provided at the lowest end of the biosynthesis cavity, and a liquid intake control valve is provided on the liquid intake port.

[0009] As a further illustration of the present invention, the biomixing mechanism includes a mixing shaft, a fixed sleeve, a mixing rod, a chopping rod and a mixing motor. A cross-shaped bracket is fixed in the middle of the mesh plate cavity, and a bearing seat is fixed on both sides of the middle of the cross-shaped bracket. A mixing shaft is rotatably connected in each of the bearing seats, and the other side of the mixing shaft is rotatably connected to the side end of the mesh plate cavity. A mixing motor is also installed on the outside of the mesh plate cavity near the outer end of each mixing shaft, and the output shaft of the mixing motor is transmission-connected to the adjacent mixing shaft; A plurality of fixed sleeves are fixed at equal intervals on the outside of the mixing shaft, and a mixing rod and a crushing rod are fixed on the outside of the fixed sleeve and on the line where the diameter of the mixing sleeve is located.

[0010] As a further illustration of the present invention, the mixing rod is specifically composed of a plurality of semicircular rods arranged on the same plane and fixed in sequence, and the crushing rod is an arc-shaped rod with cutting edges on both sides.

[0011] As a further illustration of the present invention, the distance between two adjacent fixing sleeves is set at 10-15 cm.

[0012] As a further explanation of the present invention, four limiting seats are fixed on the outside of the mesh plate cavity near the top, and four limiting rods are fixed in the biosynthesis cavity. The limiting seats are slidably connected to the outside of the limiting rods.

[0013] As a further illustration of the present invention, an electric heating rod is further provided in the limiting rod, and the electric heating rod performs heating operation through an external power supply.

[0014] As a further explanation of the present invention, an aeration panel is also provided on the inner bottom surface of the biosynthesis chamber, and a plurality of aeration heads are provided on the aeration panel. The aeration heads extend into the interior of the biosynthesis chamber, and the aeration panel is also provided with a pipeline connection port for an external air supply pipeline.

[0015] As a further illustration of the present invention, the inner cavity depth of the biosynthesis cavity is twice the height of the mixing cavity, and the volume of the metal ion solution placed in the biosynthesis cavity is half the volume of the biosynthesis cavity.

[0016] Compared with the prior art, the present invention has the following advantages: The present invention provides a mixing chamber in a biosynthesis chamber, wherein a metal ion solution for biosynthesis is placed in the biosynthesis chamber, and biological raw materials to be synthesized are placed in the mixing chamber. The mixing chamber consists of a mesh chamber and a top frame. The mesh chamber is specifically a rectangular chamber with an open top made of a steel mesh. The steel mesh is made of high-strength, corrosion-resistant steel wire, so that it can maintain a stable shape during use while avoiding corrosion by the metal ion solution, thereby improving the service life of the mixing chamber. A top frame is fixed to the top of the mesh cavity, and hinge seats are symmetrically installed on both sides of the top of the top frame. Hydraulic cylinders are also installed on both sides of the top of the biosynthesis cavity. The telescopic shaft of the hydraulic cylinder extends into the biosynthesis cavity, and the telescopic shaft of the hydraulic cylinder is rotatably connected in the hinge seat. The movable connection of the mixing cavity in the biosynthesis cavity is completed by the hydraulic cylinder. Specifically, in the process of biological raw materials participating in the synthesis of metal nanomaterials in the mixing cavity, the hydraulic cylinder can drive the mixing cavity to be raised and lowered in the biosynthesis cavity, so that the biological raw materials and the metal ion solution can be mixed vertically. At the same time, the biological raw material fragments that have been degraded to a particle size smaller than the aperture of the steel mesh can be dropped into the outer cavity of the mixing cavity, and further react with the metal ion solution in the biosynthesis cavity, which is convenient for the biological raw materials to participate in the synthesis operation in stages.

[0017] Two biological mixing mechanisms are movably installed in the mixing chamber of the present invention. The biological mixing mechanism includes a mixing shaft, a fixed sleeve, a mixing rod, a crushing rod and a mixing motor. The mixing motor can drive the corresponding mixing shaft to rotate. A plurality of fixed sleeves are fixed at equal intervals on the outside of the mixing shaft. A mixing rod and a crushing rod are fixed on the line where the diameter of the mixing sleeve is located on the outside of the fixed sleeve. The crushing rod is an arc-shaped rod with cutting edges on both sides. The crushing rod is used to complete the crushing process of the biological raw materials. The mixing rod is specifically composed of a plurality of semicircular rods arranged on the same plane and fixed in sequence. During the rotation of the mixing rod, the biological raw materials in the area can be driven to move and mix with the metal ion solution, so that the mixing process of the biological raw materials and the metal ion solution can be completed through the mixing rod. Each mixing motor is connected to an independently controlled control switch, so that the direction and speed of the mixing motor can be controlled separately, so that the two mixing shafts can rotate differently, thereby improving the contact efficiency between the biological raw materials and the metal ions in the mixing chamber, and facilitating the full reaction of the biological raw materials and the metal ion solution.

[0018] When the present invention is used, a metal ion solution for biosynthesis is first placed in the biosynthesis chamber, and then the biological raw materials to be synthesized are placed in the mixing chamber, and a sealing cover is put on to carry out the metal nanomaterial synthesis operation; during the synthesis, the hydraulic cylinder and the mixing motor are started, and the hydraulic cylinder can drive the mixing chamber to perform a lifting operation in the biosynthesis chamber, thereby completing the mixing of the biological raw materials and the metal ion solution in the mixing chamber in the longitudinal space. The lowest height during lifting is when the metal ion solution covers the biological raw materials, and the highest height is when half of the organic pollutants are immersed in the metal ion solution. The rotation of the mixing motor can drive the rotation of the mixing shaft, and the direction and speed of each mixing motor can be independently controlled, so that the two mixing shafts can be It can rotate differentially. The crushing rod is an arc-shaped rod with cutting edges on both sides. The mixing shaft can drive the crushing rod to rotate during its rotation. The cutting edges can be used to cut the biological raw materials into pieces during the rotation of the crushing rod, so that the crushing process of the biological raw materials can be completed through the crushing rod. The biological raw materials in the region can be driven to move and mix with the metal ion solution during the rotation of the mixing rod, so that the mixing process of the biological raw materials and the metal ion solution can be completed through the mixing rod. As the biosynthesis proceeds, the biological raw material fragments that are degraded to a particle size smaller than the aperture of the steel mesh fall into the outer cavity of the mixing cavity, and further react with the metal ion solution in the biosynthesis cavity, which is convenient for the staged participation of the biological raw materials in the synthesis operation, improves the synthesis efficiency of metal nanomaterials, and is convenient and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a bottom view of the cross-sectional structure of the mixing cavity of the present invention; Figure 3 This is a front view of the connection structure of the mixing rod and the crushing rod of the present invention.

[0020] Description of reference numerals: 1-biosynthesis chamber; 11-opening; 12-sealing cover; 13-pressure relief valve; 14-exhaust panel; 15-pressure monitoring head; 16-support frame; 17-liquid extraction port; 2-mixing chamber; 21-mesh chamber; 22-top frame; 23-hinge seat; 24-cross bracket; 3-hydraulic cylinder; 4-biomixing mechanism; 41-mixing shaft; 42-fixing sleeve; 43-mixing rod; 44-crushing rod; 45-mixing motor; 5-limiting rod; 6-aeration panel; 61-aeration head; 62-pipeline connection port. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] like Figure 1-3 As shown, the present invention provides a technical solution: a mixing device for biosynthesis of metal nanomaterials, comprising a biosynthesis cavity 1 and a mixing cavity 2 arranged in the biosynthesis cavity 1; The biosynthesis cavity 1 is a hollow cavity with an opening 11 at the top, and a sealing cover 12 is clamped at the opening. The sealing cover 12 can complete the sealing treatment of the inner cavity of the biosynthesis cavity 1, which facilitates the anaerobic degradation method.

[0023] The sealing cover plate 12 is provided with a pressure relief valve 13, an exhaust panel 14 and a pressure monitoring head 15. The pressure monitoring head 15 is used to monitor the air pressure value in the inner cavity of the biosynthesis chamber 1. The pressure relief valve 13 is used to perform pressure relief when the internal pressure of the biosynthesis chamber 1 exceeds the set value. The exhaust panel 14 is used to discharge the gas generated during the biosynthesis process.

[0024] The biosynthesis chamber 1 is filled with a metal ion solution for biosynthesis, and the specific metal ion type, such as Ag, + and Au 3+ , selected according to the target nanomaterial type.

[0025] The mixing chamber 2 is composed of a mesh chamber 21 and a top frame 22. The biological raw materials to be synthesized are placed in the mixing chamber 2. The inner cavity depth of the biosynthesis chamber 1 is twice the height of the mixing chamber 2. The volume of the metal ion solution placed in the biosynthesis chamber 1 is half the volume of the biosynthesis chamber 1, thereby avoiding the phenomenon of excessive metal ion solution in the biosynthesis chamber 1 causing the biological raw materials in the mixing chamber 2 to overflow, and facilitating the biosynthesis to be carried out in stages.

[0026] The mesh cavity 21 is specifically a rectangular cavity with an open top made of a steel mesh. The steel mesh is made of high-strength corrosion-resistant steel wire, so that it can maintain a stable shape during use while avoiding corrosion from metal ion solutions, thereby increasing the service life of the mixing cavity 2.

[0027] A top frame plate 22 is fixed to the top of the mesh cavity 21, and hinge seats 23 are symmetrically installed on both sides of the top of the top frame plate 22. Hydraulic cylinders 3 are also installed on both sides of the top of the biosynthesis cavity 1. The telescopic shaft of the hydraulic cylinder 3 extends into the biosynthesis cavity 1, and the telescopic shaft of the hydraulic cylinder 3 is rotatably connected in the hinge seat 23. The movable connection of the mixing cavity 2 in the biosynthesis cavity 1 is completed by the hydraulic cylinder 3. Specifically, in the process of the biological raw materials in the mixing cavity 2 participating in the synthesis of metal nanomaterials, the hydraulic cylinder 3 can drive the mixing cavity 2 to be raised and lowered in the biosynthesis cavity 1, so that the biological raw materials and the metal ion solution can be mixed vertically. At the same time, the biological raw material fragments that have been degraded to a particle size smaller than the aperture of the steel mesh can be dropped into the outer cavity of the mixing cavity 2 during the lifting and lowering, and further react with the metal ion solution in the biosynthesis cavity 1, so as to facilitate the staged participation of the biological raw materials in the synthesis operation.

[0028] In order to improve the stability of the mixing chamber 2 during the lifting process, four limit seats 24 are fixed on the outside of the mesh cavity 21 near the top, and four limit rods 5 are fixed in the biosynthesis cavity 1. The limit seats 24 are slidably connected to the outside of the limit rods 5. Under the action of the limit seats 24 and the limit rods 5, the mixing chamber 2 can be lifted and lowered stably.

[0029] In order to improve the functionality of the limit rod 5, an electric heating rod is also provided inside the limit rod 5. The electric heating rod performs heating operation through an external power supply. The heating energy can keep the biological system in a stable range suitable for activity, which can further improve the efficiency of biosynthesis operation.

[0030] A support frame 16 is fixed to the outer bottom end of the biosynthesis chamber 1. The bottom end of the biosynthesis chamber 1 is an inward-closed setting, and a liquid intake port 17 is provided at the lowest end of the biosynthesis chamber 1. A liquid intake control valve is provided on the liquid intake port 17. After the synthesis is completed, the suspension containing metal nanoparticles can be discharged through the liquid intake port 17.

[0031] The mixing chamber 2 also includes two bio-mixing mechanisms 4 movably installed therein. A mixing rod 43 and a chopping rod 44 are provided in the bio-mixing mechanism 4. The bio-mixing mechanism 4 includes a mixing shaft 41, a fixed sleeve 42, a mixing rod 43, a chopping rod 44 and a mixing motor 45. A cross-shaped bracket 24 is fixed in the middle of the mesh plate cavity 21. A bearing seat is fixed on both sides of the middle of the cross-shaped bracket 24. A mixing shaft 41 is rotatably connected in each of the bearing seats. The other side of the mixing shaft 41 is rotatably connected to the side end of the mesh plate cavity 21. A mixing motor 45 is also installed on the outside of the cavity 21 near the outer end of each mixing shaft 41. The output shaft of the mixing motor 45 is connected to the adjacent mixing shaft 41 in a transmission manner. The corresponding mixing shaft 41 can be driven to rotate by the mixing motor 45. Each mixing motor 45 is connected to an independently controlled control switch, so that the direction and speed of the mixing motor 45 can be controlled separately, so that the two mixing shafts 41 can rotate differently, thereby improving the contact efficiency between the biological raw materials and the metal ions in the mixing cavity 2, and facilitating the full reaction of the biological raw materials and the metal ion solution.

[0032] A plurality of fixed sleeves 42 are fixed at equal intervals on the outside of the mixing shaft 41, and a mixing rod 43 and a crushing rod 44 are fixed on the outside of the fixed sleeve 42 and on the line where the diameter of the mixing sleeve 41 is located. The crushing rod 44 is an arc-shaped rod with cutting edges on both sides, and the crushing processing of the biological raw materials is completed through the crushing rod 44.

[0033] The mixing rod 43 is specifically composed of multiple semicircular rods fixed in sequence on the same plane. During the rotation of the mixing rod 43, the biological raw materials and the metal ion solution in the area can be driven to move and mix, thereby completing the movement and mixing of the biological raw materials and the metal ion solution through the mixing rod 43.

[0034] In order to avoid a mixing blind zone caused by a small distance between two adjacent mixing rods 43, the distance between two adjacent fixing sleeves 42 is set to 10-15 cm.

[0035] The inner bottom surface of the biosynthesis chamber 1 is also provided with an aeration panel 6, and a plurality of aeration heads 61 are provided on the aeration panel 6. The aeration heads 61 extend into the interior of the biosynthesis chamber 1. The aeration panel 6 is also provided with a pipe connection port 62 for connecting an external air supply pipe. An external oxygen supply pipe can be connected through the pipe connection port 62, thereby providing a suitable gas environment when performing aerobic or anaerobic synthesis operations, thereby facilitating the efficient completion of biosynthesis operations.

[0036] In summary, when in use, the metal ion solution for biosynthesis is first placed in the biosynthesis chamber 1, and then the biological raw materials to be synthesized are placed in the mixing chamber 2, and the sealing cover 12 is covered to carry out the metal nanomaterial synthesis operation; During degradation, the hydraulic cylinder 3 and the mixing motor 45 are activated, and the hydraulic cylinder 3 can drive the mixing chamber 2 to move up and down in the biosynthesis chamber 1, thereby completing the mixing of the biological raw material and the metal ion solution in the mixing chamber 2 in the longitudinal space. The lowest height during the lifting is when the metal ion solution covers the biological raw material, and the highest height is when half of the biological raw material is immersed in the metal ion solution. The rotation of the mixing motor 45 can drive the rotation of the mixing shaft 41, and the direction and speed of each mixing motor 45 can be controlled independently, so that the two mixing shafts 41 can rotate differently. The crushing rod 44 is an arc-shaped rod with cutting edges on both sides. The rotation of the mixing shaft 41 can drive the crushing rod 44 to rotate. The crushing rod 44 can cut the biological raw materials through the cutting edges during the rotation, so that the crushing processing of the biological raw materials can be completed through the crushing rod 44.

[0037] During the rotation of the mixing rod 43 , the biological raw materials and the metal ion solution in the region can be driven to move and mix, so that the mixing process of the biological raw materials and the metal ion solution can be completed through the mixing rod 43 .

[0038] As the biosynthesis proceeds, the biomaterial fragments with a particle size smaller than the steel mesh aperture fall into the outer cavity of the mixing cavity 2 after being crushed, and the metal ion solution further reacts in the biosynthesis cavity 1, which facilitates the staged participation of the biomaterial in the synthesis operation, improves the synthesis efficiency of the metal nanomaterial, and is convenient and practical.

[0039] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0040] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A mixing device for biosynthesis of metal nanomaterials, characterized by: It comprises a biosynthesis cavity (1) and a mixing cavity (2) arranged in the biosynthesis cavity (1); The biosynthesis chamber (1) is a hollow chamber with an opening (11) at the top, a sealing cover plate (12) is clamped at the opening, and a metal ion solution for biosynthesis is placed in the biosynthesis chamber (1); the mixing chamber (2) is composed of a mesh chamber (21) and a top frame plate (22), the mesh chamber (21) is specifically a rectangular chamber with an open top made of steel mesh, a top frame plate (22) is fixed on the top of the mesh chamber (21), biological raw materials to be synthesized are placed in the mixing chamber (2), and hinge seats (23) are symmetrically installed on both sides of the top of the top frame plate (22), and hydraulic cylinders (3) are also installed on both sides of the top of the biosynthesis chamber (1), and the telescopic shaft of the hydraulic cylinder (3) extends into the biosynthesis chamber (1), and the telescopic shaft of the hydraulic cylinder (3) is rotatably connected in the hinge seat (23), and the movable connection of the mixing chamber (2) in the biosynthesis chamber (1) is completed by the hydraulic cylinder (3); Two biological mixing mechanisms (4) are also movably installed in the mixing cavity (2). A mixing rod (43) and a crushing rod (44) are provided in the biological mixing mechanism (4). The crushing rod (44) is used to complete the crushing process of the biological raw material, and the mixing rod (43) is used to complete the mixing process of the biological raw material and the metal ion solution.

2. A mixing device for biosynthesis of metal nanomaterials according to claim 1, characterized in that: The sealing cover plate (12) is provided with a pressure relief valve (13), an exhaust panel (14) and a pressure monitoring head (15). The pressure monitoring head (15) is used to monitor the air pressure value in the inner cavity of the biosynthesis chamber (1). The pressure relief valve (13) is used to perform pressure relief processing when the inner pressure of the biosynthesis chamber (1) exceeds a set value. The exhaust panel (14) is used to discharge the gas generated during the biodegradation process.

3. A mixing device for biosynthesis of metal nanomaterials according to claim 1, characterized in that: A support frame (16) is fixed to the outer bottom end of the biosynthesis cavity (1), the bottom end of the biosynthesis cavity (1) is an inward-closed opening, and a liquid extraction port (17) is provided at the lowest end of the biosynthesis cavity (1), and a liquid extraction control valve is provided on the liquid extraction port (17).

4. A mixing device for biosynthesis of metal nanomaterials according to claim 1, characterized in that: The biological mixing mechanism (4) includes a mixing shaft (41), a fixed sleeve (42), a mixing rod (43), a crushing rod (44) and a mixing motor (45); a cross-shaped bracket (24) is fixed in the middle of the mesh plate cavity (21); a bearing seat is fixed on both sides of the middle of the cross-shaped bracket (24); a mixing shaft (41) is rotatably connected in each of the bearing seats; the other side of the mixing shaft (41) is rotatably connected to the side end of the mesh plate cavity (21); a mixing motor (45) is also installed on the outside of the mesh plate cavity (21) near the outer end of each mixing shaft (41); the output shaft of the mixing motor (45) is transmission-connected to the adjacent mixing shaft (41); A plurality of fixed sleeves (42) are fixed at equal intervals on the outside of the mixing shaft (41), and a mixing rod (43) and a crushing rod (44) are fixed on the outside of the fixed sleeve (42) and on a line where the diameter of the mixing sleeve (41) is located.

5. A mixing device for biosynthesis of metal nanomaterials according to claim 4, characterized in that: The mixing rod (43) is specifically composed of a plurality of semicircular rods arranged on the same plane and fixed in sequence, and the crushing rod (44) is an arc-shaped rod with cutting edges on both sides.

6. The mixing device for biosynthesis of metal nanomaterials according to claim 4, characterized in that: The distance between two adjacent fixing sleeves (42) is set at 10-15 cm.

7. The mixing device for biosynthesis of metal nanomaterials according to claim 1, characterized in that: Four limiting seats (24) are fixed on the outside of the mesh plate cavity (21) near the top, and four limiting rods (5) are fixedly arranged in the biosynthesis cavity (1), and the limiting seats (24) are slidably connected to the outside of the limiting rods (5).

8. The mixing device for biosynthesis of metal nanomaterials according to claim 7, characterized in that: An electric heating rod is also provided inside the limiting rod (5), and the electric heating rod performs heating operation through an external power supply.

9. The mixing device for biosynthesis of metal nanomaterials according to claim 1, characterized in that: The inner bottom surface of the biosynthesis chamber (1) is further provided with an aeration panel (6), and a plurality of aeration heads (61) are provided on the aeration panel (6). The aeration heads (61) extend into the interior of the biosynthesis chamber (1). The aeration panel (6) is further provided with a pipeline connection port (62) for connecting an external air supply pipeline.

10. The mixing device for biosynthesis of metal nanomaterials according to claim 1, characterized in that: The inner cavity depth of the biosynthesis cavity (1) is twice the height of the mixing cavity (2), and the volume of the metal ion solution placed in the biosynthesis cavity (1) is half the volume of the biosynthesis cavity (1).

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