Method for detecting content of sulfur in marine fuel oil by using tin dioxide quantum dots

A tin dioxide and quantum dot technology, applied in the field of fluorescent materials, can solve the problems of low measurement accuracy and low stability, and achieve the effects of simple detection process, low detection limit and good fluorescence response

Active Publication Date: 2021-08-17
DALIAN MARITIME UNIVERSITY
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  • Abstract
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Problems solved by technology

[0004] In view of the above problems, the present invention researches and designs a method of using tin dioxide quantum dots to detect the sulfur content in marine fuel oil, so as to solve the problems of low measurement accuracy and low stability when traditional methods measure marine fuel oil.

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  • Method for detecting content of sulfur in marine fuel oil by using tin dioxide quantum dots
  • Method for detecting content of sulfur in marine fuel oil by using tin dioxide quantum dots
  • Method for detecting content of sulfur in marine fuel oil by using tin dioxide quantum dots

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Embodiment Construction

[0025] The present invention takes aqueous solution as main raw material, in thiourea (CH 4 N 2 Under the catalysis of S), through stannous chloride dihydrate (SnCl 2 2H 2 O) SnO was prepared by hydrolytic oxidation 2 quantum dots, and the introduction of hydrothermal treatment controls the grain growth of quantum dots.

[0026] Due to the tautomerization of thiourea and isothiourea in acidic solution, CH 4 N 2 S plays the role of stabilizer and accelerator. Therefore, it consumes HCl and accelerates the progress of formula (1) and SnO 2 Formation of quantum dots.

[0027] SnCl 2 +2H 2 O→Sn(OH) 2 +2HCl (1)

[0028] 2Sn(OH) 2 +O 2 →2SnO 2 +2H 2 O (2)

[0029] In the present invention, SnO 2 The preparation of the quantum dot solution is realized through the following technical scheme, and the specific steps are:

[0030] Weigh an appropriate amount of CH according to the molar ratio of 1:10 4 N 2 S and SnCl 2 2H 2 O, mix and dissolve the two substances in ...

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Abstract

The invention discloses a method for detecting the content of sulfur in marine fuel oil by using tin dioxide quantum dots. The method comprises the following steps: carrying out hydrothermal treatment on a tin dioxide quantum dot solution at 180-200 DEG C for 5-6 hours; standing the stannic oxide quantum dot solution, taking out supernatant liquid, and adding absolute ethyl alcohol with the same volume to obtain a stannic oxide quantum dot ethanol solution; adding a fuel oil solution with the known sulfur content into the tin dioxide quantum dot ethanol solution, and measuring the fluorescence intensity of the tin dioxide quantum dots; adding the n-butyl sulfide solution for multiple times, calculating the sulfur content after each addition, respectively measuring the fluorescence intensity, and establishing a characteristic curve between the sulfur content and the fluorescence intensity; and adding the fuel oil to be detected into the tin dioxide quantum dots, measuring the fluorescence intensity, and substituting the fluorescence intensity into the characteristic curve to obtain the sulfur content. The content of sulfur in the fuel oil can be effectively detected by utilizing the tin dioxide quantum dots, and the method is simple and easy to operate, high in feasibility, good in chemical stability, low in cost and non-toxic.

Description

technical field [0001] The invention belongs to the technical field of fluorescent materials, and in particular relates to a method for detecting sulfur content in marine fuel oil by using tin dioxide quantum dots. Background technique [0002] The shipping industry plays a vital role in international trade, and a large amount of international goods are shipped by sea every year. However, the air pollution is also aggravated when the ship sails. A large number of research results show that the SO in the exhaust gas emitted by the ship 2 About 4% to 9%. This is because there are many sulfur-containing components in fuel oil used by ships, such as mercaptans, sulfides, disulfides, thiophenes and their derivatives, among which organic sulfides are the main ones, and sulfides are very harmful to the human body and the atmospheric environment. Harmful, and most of it forms sulfur dioxide during combustion and is discharged with the exhaust gas. In order to effectively control ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
CPCG01N21/643G01N2021/6432
Inventor 蔡茂园张瀚文丁辰汶张斯达孙澜城李文萍李泓锦符策刘剑桥
Owner DALIAN MARITIME UNIVERSITY
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