CN111028642A

CN111028642A - Teaching mould for electrochemiluminescence effect

Info

Publication number: CN111028642A
Application number: CN201911320997.8A
Authority: CN
Inventors: 方凌花
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-04-17

Abstract

A teaching model of electrochemiluminescence effect belongs to the application teaching field. The device consists of a black opaque box body, a photoresistor, a power supply box capable of adjusting voltage, a switch button, an ohmmeter, a connecting wire and a connecting plug. The device is mainly composed of a simple electrolytic cell device, although the precision cannot be compared with a scientific research analysis device, the device is sufficiently applied to teaching demonstration, the structural principle is simple, the device is very suitable for demonstrating the experiment for senior high school students, and the teaching cost is greatly reduced; in addition, the user can change the resistance value of the photoresistor by adjusting the voltage to increase or decrease the light intensity, and the change of the component value is measured by the ohmmeter to illustrate the phenomenon in a data mode.

Description

Teaching mould for electrochemiluminescence effect

Technical Field

The invention relates to an electrochemiluminescence teaching mould, in particular to a device which adopts the principle of electrochemiluminescence effect, utilizes a chemical electrolytic cell to demonstrate the principle of the effect and demonstrates to senior high school students, and belongs to the field of application teaching.

Background

Electrochemiluminescence (ECL) is chemiluminescence resulting from an electrochemical reaction. The method has the advantages of no need of expensive equipment, high analysis precision, wide application range and the like, and becomes a high-performance analysis technology of modern analytical chemistry. The technology is mainly applied to organic chemistry research at present. However, the effect is difficult to understand, has strong professional ability, and cannot be well popularized to the public, so that other professional researchers have some difficulties in using the effect.

The electrochemistry in high school chemistry is a relatively easy-to-understand point of knowledge, is well known to most people in the academic world, and is simple to manufacture and low in cost. Therefore, electrochemistry is widely used in various industrial and domestic fields.

Disclosure of Invention

Aiming at the problem that the electrochemiluminescence effect cannot be widely understood, the invention provides a teaching model of the electrochemiluminescence effect.

The invention is realized by the following technical scheme: a teaching model for electrochemiluminescence effect is composed of a black opaque box body, a photoresistor, a voltage-adjustable power box, a switch button, an ohmmeter, a connecting wire and a connecting plug. A beaker is arranged in the black opaque box body, 9, 10-diphenylanthracene solution is contained in the beaker, a cathode and an anode made of carbon rods are placed in the beaker, and the two electrodes are connected with a lead and connected with a power supply box capable of adjusting voltage. And then a separate loop is connected with the photoresistor (which decreases along with the increase of illumination intensity) in the voltage-adjustable power box, and an ohmmeter is connected in parallel on two sides of the photoresistor. The power box capable of adjusting voltage is arranged at the rear side of the black opaque box body, and a switch button is arranged on the power box to control the power supply. The power box with adjustable voltage only controls the loop connected with the electric appliance. The tail of the power box capable of adjusting the voltage is connected with a connecting wire and a connecting wire plug for connecting a live wire and a zero wire.

The invention has the advantages that the device is formed by using a simple electrolytic cell device as a main body, although the precision cannot be compared with a scientific research analysis device, the device is sufficiently applied to teaching demonstration, the structural principle is simple, the device is very suitable for demonstrating the experiment for senior high school students, and the teaching cost is greatly reduced; in addition, the user can adjust the voltage to increase or decrease the light intensity to change the resistance value of the photoresistor, and the change of the component value is measured by the ohmmeter to illustrate the phenomenon in a data mode, so that the phenomenon is more convincing.

FIG. 1 is a schematic view of the present invention;

FIG. 2 is an internal structural view of a black opaque case according to the present invention;

FIG. 3 is a simplified circuit diagram of the present invention.

In the figure, 1, a black opaque box body, 101, a lead, 102, a cathode, 103, an anode, 104, 9, 10-diphenylanthracene solution, 105, a beaker, 2, a photoresistor, 3, a voltage-adjustable power box, 4, a switch button, 5, an ohmmeter, 6, a power wire, 7, a power wire plug, 301, a live wire, 302, a zero wire, 303, a power supply, 304, a switch, 305 and an electric appliance (an electrolytic cell device in the figure).

Detailed Description

A teaching model for electrochemiluminescence effect is composed of a black opaque box body 1, a photoresistor 2, a voltage-adjustable power supply 3, a switch button 4, an ohmmeter 5, a connecting wire 6 and a connecting plug 7. A beaker 105 is arranged in the black opaque box body 1, 9, 10-diphenylanthracene solution 104 is contained in the black opaque box body, a cathode 102 and an anode 103 made of carbon rods are arranged in the beaker, and the two electrodes are connected with a lead 101 and are connected with a power supply box 3 capable of adjusting voltage. And then a separate loop is connected with the photosensitive resistor 2 (which is reduced along with the increase of the illumination intensity) in the power box 3 with adjustable voltage, and an ohmmeter 5 is connected in parallel on two sides of the photosensitive resistor 2. The power box 3 which can adjust the voltage is arranged at the back side of the black opaque box body, and a switch button 4 is arranged on the power box to control the power supply. The voltage-adjustable power box 3 can adjust the voltage in the loop to which the electrical appliance 305 is connected. The other circuit with the light dependent resistor 2 cannot change the voltage. The tail end of the power box 3 with adjustable voltage is connected with an electric wire 6 and an electric wire plug 7 for connecting a live wire 301 and a zero wire 302.

The use method of the device is that an electric wire plug 7 is inserted into a socket to connect a live wire 301 and a zero wire 302, power is supplied to the device, and a beaker 105 containing 9, 10-diphenylanthracene solution 104, a cathode 102 and an anode 103 are connected by a lead 101. The switch button 4 is pressed to connect the circuit. The chemical energy generated in the 9, 10-diphenylanthracene solution 104 in the beaker 105 changes electrons from a ground state to an excited state with high energy, then photons are released from the excited state to return to the ground state, the generated light is received by the photoresistor 2, and the change of the resistance value of the ohm-meter 5 is observed. And finally, pressing the switch button 4, and pulling down the wiring plug 7 to finish the observation experiment.

It will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in the embodiments described above without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims.

Claims

1. A teaching model for electrochemiluminescence effect is composed of a black opaque box body, a photoresistor, a voltage-adjustable power box, a switch button, an ohmmeter, a connecting wire and a connecting plug. A beaker is arranged in the black opaque box body, 9, 10-diphenylanthracene solution is contained in the beaker, a cathode and an anode made of carbon rods are placed in the beaker, and the two electrodes are connected with a lead and connected with a power supply box capable of adjusting voltage. And then a separate loop is connected with the photoresistor (which decreases along with the increase of illumination intensity) in the voltage-adjustable power box, and an ohmmeter is connected in parallel on two sides of the photoresistor. The power box capable of adjusting voltage is arranged at the rear side of the black opaque box body, and a switch button is arranged on the power box to control the power supply. The power box with adjustable voltage only controls the loop connected with the electric appliance. The tail of the power box capable of adjusting the voltage is connected with a connecting wire and a connecting wire plug for connecting a live wire and a zero wire.

2. An electrochemiluminescence teaching tool as set forth in claim 1 wherein the apparatus is constructed using a simple electrolytic cell apparatus as a main body, and is sufficiently applicable to teaching demonstration although the accuracy is not comparable to scientific research analysis apparatus. Simple structure, is very suitable for demonstrating the experiment for high school students, and greatly reduces the teaching cost.

3. An electrochemiluminescence teaching tool as recited in claim 1 wherein the user changes the resistance of the photo-resistor by adjusting the voltage to increase or decrease the intensity of light and the change in the composition is measured by ohmmeter to illustrate the phenomenon in data form.