Catalyst particle configuration for photocatalytic synthesis of 2, 6-dimethylaniline
By designing ladder-structured strontium titanate photocatalyst particles, the problems of insufficient light energy utilization and active sites in traditional photocatalysts were solved, efficient synthesis of 2,6-dimethylaniline was achieved, the stability and mechanical strength of the catalyst were improved, and industrial applications were supported.
Patent Information
- Application Number
- CN202422767468.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-13
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-11-13
AI Technical Summary
Traditional photocatalysts have shortcomings in light energy utilization, active sites and single catalyst structure, which limit their application on an industrial scale.
A strontium titanate photocatalyst particle with a stepped structure is designed. The width, height and number of steps are precisely controlled through 3D printing technology to optimize the transmission and separation of photogenerated carriers and increase the specific surface area and mechanical strength of the catalyst.
It significantly improved the photocatalytic activity and stability of the catalyst, increased the synthesis efficiency of 2,6-dimethylaniline, enhanced the mechanical strength and thermal stability of the catalyst, and provided support for industrial applications.
Smart Images
Figure CN223312077U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a catalyst particle configuration for photocatalytic synthesis of 2,6-dimethylaniline, and belongs to the technical field of photocatalytic materials. Background Art
[0002] Photocatalytic technology, as an emerging green chemical method, has shown great application potential in the fields of environmental purification, energy synthesis, etc. in recent years. Among them, semiconductor photocatalysts have attracted much attention due to their efficient photocatalytic activity. However, traditional photocatalysts still face many challenges in practical applications, such as low light energy utilization, insufficient active sites, and single catalyst structure, which limit their widespread application on an industrial scale. In response to the problems of traditional catalysts, in recent years, step-type catalysts have received widespread attention due to their unique structural design. Step-type catalysts effectively solve the limitations of traditional catalysts by increasing the specific surface area, optimizing the mass transfer path, and improving the light absorption performance. In the catalytic reaction, the step-type structure can provide more active sites, enhance the light absorption capacity and reaction efficiency of the catalyst, and at the same time, through the optimized design of the structure, the mechanical strength and thermal stability of the catalyst are improved.
[0003] In the above context, this utility model patent proposes a catalyst particle configuration for the photocatalytic synthesis of 2,6-dimethylaniline based on strontium titanate photocatalyst for the photocatalytic synthesis of 2,6-dimethylaniline. It aims to significantly improve the photocatalytic performance and application potential of the catalyst through structural optimization, and provide a new solution for the industrial application of photocatalytic technology. Utility Model Content
[0004] This utility model relates to the field of photocatalytic materials technology, specifically a catalyst particle configuration for the photocatalytic synthesis of 2,6-dimethylaniline. The invention aims to significantly enhance photocatalytic activity through structural optimization, providing efficient photocatalytic solutions for environmental protection and new energy. Currently, photocatalytic technology is increasingly being used in environmental purification and energy synthesis, but traditional photocatalysts have limitations in carrier separation and catalytic efficiency, particularly insufficient light absorption efficiency and the number of active sites, which restrict their practical application.
[0005] In order to solve these problems, the utility model proposes a catalyst particle configuration for photocatalytic synthesis of 2,6-dimethylaniline, wherein the catalyst particle has a stepped structure, and the stepped structure comprises: a plurality of stepped units, each of which comprises: a step width, a step height, and a step number a;
[0006] The step width is 6-10 nm, the step height is 2-5 nm, and the number of steps a is 2 to 3.
[0007] Preferably, the stepped structure includes a particle size (d), and the particle size (d) is 200 nm to 500 nm, so as to optimize the transmission efficiency of photogenerated carriers.
[0008] Preferably, the ratio of the step height (H) to the step width (W) of the catalyst particles is 0.25 to 0.5, so as to balance the light absorption efficiency and the specific surface area of the catalyst.
[0009] Preferably, the catalyst particles are prepared by 3D printing technology to ensure precise size control and shape consistency of the stepped structure.
[0010] Preferably, the catalyst particles are suitable for photocatalytic synthesis of 2,6-dimethylaniline.
[0011] Furthermore, the catalyst adopts a multi-level stepped structure, the main body is a cube-like structure, the particle size d is the side length of the cube-like structure, and the step width (W), step height (H), and step number a are all carefully designed.
[0012] The step width W directly affects the specific surface area, and thus the number of active sites on the catalyst. Optimizing the width ensures the catalyst provides sufficient active sites, increasing the contact area with the reactants and thus improving catalytic efficiency. By controlling the optimal width range, the specific surface area and the mechanical strength of the catalyst particles are balanced, avoiding either structural fragility due to a too narrow step or a reduction in active sites due to an overly wide step.
[0013] Preferably, the step width W of the photocatalyst particles is 6 nm.
[0014] The step height H affects the light penetration depth within the catalyst and the transport path of photogenerated charges. Optimizing the step height ensures deeper light penetration into the catalyst, improving light absorption efficiency. Choosing the right step height ensures effective separation and migration of photogenerated electrons and holes, minimizing electron-hole recombination and enhancing photocatalytic activity.
[0015] Preferably, the step height H of the photocatalyst particles is 4 nm.
[0016] The number of steps a (steps) in a catalyst's structure is one of the key parameters influencing its photocatalytic performance. Adjusting the number of steps not only affects the catalyst's specific surface area and light absorption pathways, but also influences the mass transfer of reactants and the separation efficiency of photogenerated charge carriers. Each "step" surface provides an active site, and increasing the number of steps directly increases the number of these sites, allowing more reactant molecules to adsorb simultaneously on the catalyst surface for reaction. The stepped structure enables light to reflect multiple times within the catalyst, increasing the opportunities for light to come into contact with the catalyst and thus improving light utilization efficiency.
[0017] Preferably, the number of steps a of the photocatalyst particles is 3.
[0018] The catalyst particle size (d) directly impacts the catalyst's mass transfer performance and the efficiency of photogenerated charge transfer. Optimizing the size promotes efficient diffusion of reactant molecules while improving charge collection and transfer efficiency. Controlling the particle size between 200nm and 300nm ensures adequate mass transfer efficiency while enhancing the separation and transfer efficiency of photogenerated charges.
[0019] Preferably, the particle size of the photocatalyst particles is 260 nm.
[0020] Beneficial effects
[0021] The utility model discloses a catalyst particle configuration for photocatalytic synthesis of 2,6-dimethylaniline. Through structural optimization, the photocatalytic activity is significantly improved. Furthermore, the unique stepped structure enhances the mechanical strength and thermal stability of the catalyst, providing important support for the industrial application of photocatalytic technology. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a top view schematic diagram of the configuration of the photocatalyst particles of the present invention.
[0023] Figure 2 This is a front view of the photocatalyst particles of the present invention.
[0024] Figure 3 This is a scanning electron microscope picture of the photocatalyst particles of the present invention.
[0025] Figure 4 It is the electron diffraction pattern of the photocatalyst particles of the utility model.
[0026] Figure 5 It is the ultraviolet-visible diffuse reflection absorption spectrum of the photocatalyst particles of the utility model.
[0027] In the figure, H is step height; W is step width; d is particle size. DETAILED DESCRIPTION
[0028] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.
[0029] The utility model proposes a catalyst particle configuration for photocatalytic synthesis of 2,6-dimethylaniline. The catalyst particle has a stepped structure. The stepped structure includes: a plurality of stepped units. Each stepped unit includes: a step width (W), a step height (H), and a step number a;
[0030] The step width (W) is 6-10 nm, the step height (H) is 2-5 nm, and the number of steps a is 2 to 3.
[0031] The stepped structure includes a particle size (d) ranging from 200 nm to 500 nm to optimize the transmission efficiency of photogenerated carriers.
[0032] The ratio of the step height (H) to the step width (W) of the catalyst particles is 0.25 to 0.5, so as to balance the light absorption efficiency and the specific surface area of the catalyst.
[0033] Among them, the catalyst particles are prepared by 3D printing technology to ensure precise size control and shape consistency of the stepped structure.
[0034] The catalyst particles are suitable for photocatalytic synthesis of 2,6-dimethylaniline.
[0035] Table 1
[0036]
[0037] Example 1
[0038] The catalyst was prepared using 3D printing technology, precisely achieving the aforementioned dimensional parameters by controlling the template structure. The photocatalyst particles had a W of 4 nm, a H of 6 nm, two steps, and a particle size of 300 nm. The catalyst's photocatalytic efficiency in the synthesis of 2,6-dimethylaniline was tested under simulated sunlight. Results showed a 30% improvement in efficiency compared to the unoptimized catalyst.
[0039] Example 2
[0040] The catalyst was prepared using 3D printing technology, precisely achieving the aforementioned dimensional parameters by controlling the template structure. The photocatalyst particles had a W of 5 nm, an H optimized to 3 nm, a number of steps of 3, and a particle size of 400 nm. The catalyst's photocatalytic efficiency for the synthesis of 2,6-dimethylaniline was tested under simulated sunlight. Results showed a 25% improvement in efficiency compared to the unoptimized catalyst.
[0041] Example 3
[0042] The catalyst was prepared using 3D printing technology, precisely achieving the aforementioned dimensional parameters by controlling the template structure. The photocatalyst particles had a W of 7 nm, an H optimized to 2.5 nm, a step size of 3, and a particle size of 260 nm. The catalyst's photocatalytic efficiency for the synthesis of 2,6-dimethylaniline was tested under simulated sunlight. Results showed a 35% improvement in efficiency compared to the unoptimized catalyst.
[0043] Comparative Example 1
[0044] The catalyst was prepared using 3D printing technology, precisely achieving the aforementioned dimensional parameters by controlling the template structure. The photocatalyst particles were 260 nm in size and consisted of regular tetrahedral strontium titanate catalysts with no steps. The catalyst's photocatalytic efficiency for the synthesis of 2,6-dimethylaniline was tested under simulated sunlight.
[0045] In this utility model, by precisely controlling the width, height, and number of each "step," the catalyst's specific surface area is significantly increased, providing space for more active sites and significantly improving catalytic efficiency and selectivity. Furthermore, the open spaces between the steps optimize the mass transfer path, reduce flow resistance, ensure uniform distribution of the reaction medium, and enhance the catalyst's thermal stability and mechanical strength, effectively improving the activity and stability of the photocatalytic synthesis of 2,6-dimethylaniline.
[0046] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.
Claims
1. A catalyst particle configuration for photocatalytic synthesis of 2,6-dimethylaniline, characterized in that: The catalyst particles have a stepped structure, the stepped structure comprising: a plurality of stepped units, each stepped unit comprising: a step width (W), a step height (H), and a step number (a); The step width (W) is 6-10 nm, the step height (H) is 2-5 nm, and the number of steps a is 2 to 3.
2. The catalyst particle configuration for photocatalytic synthesis of 2,6-dimethylaniline according to claim 1, characterized in that: The stepped structure includes a particle size (d), and the particle size (d) is 200nm to 500nm, so as to optimize the transmission efficiency of photogenerated carriers.
3. The catalyst particle configuration for photocatalytic synthesis of 2,6-dimethylaniline according to claim 1, characterized in that: The ratio of the step height (H) to the step width (W) of the catalyst particles is 0.25 to 0.5, so as to balance the light absorption efficiency and the specific surface area of the catalyst.
4. The catalyst particle configuration for photocatalytic synthesis of 2,6-dimethylaniline according to claim 1, characterized in that: The catalyst particles were prepared using 3D printing technology to ensure precise size control and shape consistency of the stepped structure.
5. The catalyst particle configuration for photocatalytic synthesis of 2,6-dimethylaniline according to claim 1, characterized in that: The catalyst particles are suitable for photocatalytic synthesis of 2,6-dimethylaniline.