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Novel composite nano system for detecting Cu<2+>

A system and composite material technology, applied in measurement devices, instruments, material analysis by electromagnetic means, etc., can solve problems such as acute poisoning of aquatic organisms, inhibit water self-cleaning function, etc., achieve control of reaction conditions, photoelectric signal enhancement, experimental Simple operation effect

Inactive Publication Date: 2021-02-05
UNIV OF JINAN
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  • Abstract
  • Description
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Problems solved by technology

[0004] Although copper ions are essential in many reactions in physiological processes, it is a harmful pollutant in wastewater discharged from processes such as metallurgy, metal processing, machinery manufacturing, steel production, etc. Abnormal uptake of Cu 2+ It can lead to Menkes' disease, Wilson's disease, Alzheimer's disease, Parkinson's disease and other diseases, and excessive copper ions will significantly inhibit the self-cleaning function of water, leading to acute poisoning of aquatic organisms

Method used

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Examples

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Embodiment 1

[0016] Example 1 (detection of Cu in the solution 2+ )

[0017] (1) Synthesis of Br, N-co-doped TiO 2 : Mix 2 mL butyl titanate (TBOT), 0.5 mL ultrapure water and 40 mL ethanol under vigorous stirring to form a homogeneous solution. After reacting for 6 h, centrifuge to separate a large amount of TiO 2 , and dried at 60 °C. Subsequently, the obtained bulk TiO 2 (0.3 g) dispersed in containing C 3 h 6 N 6 (3 mL, 0.1 g / mL), CTAB (3 mL, 0.2 g / mL), ultrapure water (50 mL) mixed solution, pour 10 mL ammonia water into the prepared mixed solution, seal in 100 mL The hydrothermal reaction was carried out at 150 °C for 24 h in an autoclave. Finally, the obtained precipitate was centrifuged and dried under vacuum at 80 °C to obtain Br, N-codoped TiO 2 for subsequent use;

[0018] (2) Synthesis of Br, N-co-doped TiO2@AuNPs: 0.05 g Br, N-co-doped TiO 2 and 30 mL ultrapure water, 200 μL 1% HAuCl 4 mixed, and subsequently, the NaBH 4 (200 μL, 0.095 g / mL) was quickly added to ...

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Abstract

The invention discloses a doped TiO2@AuNPs / CdS system for detecting Cu<2+>. By means of a photoelectrochemical reaction system, TiO2@AuNPs / CdS doped with non-metallic elements is used as a photoelectric signal enhancement module, rapid detection of Cu<2+> in a solution is achieved, through detection of Cu<2+> in the solution and comparison of a result with a mature laboratory fluorescence spectrometry, an atomic absorption spectrometry and the like, it is found that the detection method is simple in sample pretreatment, short in consumed time, and accurate and reliable in detection result. Thesystem can generate CuxS on the surface of the material through CdS and Cu<2+> to promote photon-generated carrier and hole recombination, so that the signal change is obvious, the detection limit islower, and the system can be used for rapid ultra-sensitive detection of Cu<2+> in waste liquid.

Description

technical field [0001] The invention relates to the technical field of photoelectric detection, more specifically to a detection Cu 2+ doped TiO 2 @AuNPs / CdS system. Background technique [0002] Photoactive materials play a crucial role in PEC sensing, and rational design and fabrication of photoactive materials is one of the key steps in designing high-performance PEC sensors. Compared with traditional electrochemical analysis and spectral analysis, PEC (photoelectrochemical) sensing is currently in its infancy due to its shorter development history. Especially in realizing practical applications, there are still some key challenges to be overcome and technological gaps to be bridged. In recent years, great progress has been made in the development of photoactive materials with excellent performance suitable for PEC sensing. With the overall development trend of sensors in terms of miniaturization, multi-function, and intelligence, reusable sensing elements and replace...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/333
CPCG01N27/305G01N27/308G01N27/333
Inventor 颜梅魏全勇张晶王文寿李成芳郝梦娇冯晓雯
Owner UNIV OF JINAN
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