Summary of Chemical doctoral thesis: Study on fabrication nano Platinum modified glassy carbon electrode for application to analyze lead, cadmium in the water environment

Studying and orienting applicability to detecting, quantifying separately and simultaneously cadmium, lead in aqueous environment by means of stripping voltammetry method with the desire that the nanostructures of the electrodes help increase the sensitivity of the analytical method.
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Summary of Chemical doctoral thesis: Study on fabrication nano Platinum modified glassy carbon electrode for application to analyze lead, cadmium in the water environment MINISTRY OF VIETNAM ACADEMY EDUCATION AND OF SCIENCE AND TRAINING TECHNOLOGY GRADUATE UNIVERSITY SCIENCE AND TECHNOLOGY ------- *** ------- NGUYEN THI LIEU STUDY ON FABRICATION NANO PLATINUM MODIFIED GLASSY CARBON ELECTRODE FOR APPLICATION TO ANALYZE LEAD, CADMIUM IN THE WATER ENVIRONMENT Major: Analytical chemistry Code: 9.44.01.18 SUMMARY OF CHEMICAL DOCTORAL THESIS HA NOI - 2020 This thesis is completed at Graduate University of Science and Technology - Vietnam Academy of Science and Technology Supervisor 1 : Assoc. Prof. Dr. Le Truong Giang Supervisor 2 : Assoc. Prof. Dr. Cao Van Hoang Thesis reviewer 1: …. Thesis reviewer 2: …. Thesis reviewer 3: ….. The thesis will be defended at the doctoral thesis committee at the Academy level, meeting at the Graduate University of Science and Technology - Vietnam Academy of Science and Technology at …..h, date ….., month ….., year 2020 The Thesis can be found in: - The library of Graduate University of Science and Technology - National Library of Viet Nam NEW CONTRIBUTIONS OF THE THESIS 1. Study on successfully fabricated to form a new electrode: nano flower-shaped platinum on glassy carbon electrode and evaluated the morphological, structure, composition, electrochemical properties, electrochemically active surface area of fabricated electrodes by modern analytical methods. 2. The optimal conditions were determined by the univariate method and the modeling method - experimental optimization for simultaneous determination of Cd2+ and Pb2+ on PtNFs/GC electrodes by differential pulse anodic stripping voltammetry. 3. The Cd2+ and Pb2+ analysis procedures have been developed and evaluated using the manufactured PtNFs/GC electrode with good repeatability, trueness, high accuracy, wide linear range, low detection limit. LIST OF PUBLISHED WORKS 1. Nguyễn Thị Liễu, Cao Văn Hoàng, Bùi Xuân Tỉnh, Lê Trường Giang, Nghiên cứu xác định lượng vết chì trong nước tự nhiên bằng phương pháp Von-Ampe hòa tan sử dụng điện cực màng platin/glassy cacbon, Tạp chí Hóa học, 2017, 55(3e12), 75-79. 2. Nguyễn Thị Liễu, Cao Văn Hoàng, Nguyễn Thị Thùy Linh, Bùi Văn Hào, Lê Trường Giang, Đặc tính Von-Ampe hòa tan của Pb(II) trên điện cực cacbon thủy tinh biến tính bởi platin nano dạng hạt, Tạp chí Phân tích Hóa, lý và sinh học, 2018, 23(4), 241-247. 3. Nguyễn Thị Liễu, Cao Văn Hoàng, Phạm Quốc Trung, Lê Trường Giang, Tối ưu hóa quá trình phân tích Pb(II) trên điện cực PtNFs/GC sử dụng phương pháp đáp ứng bề mặt, Tạp chí Phân tích Hóa, lý và sinh học, 2018, 23(4), 322-331. 4. Nguyen Thi Lieu, Cao Van Hoang, Pham Thi Hai Yen, Le Truong Giang, Manufacture pencil-lead electrode modified with platinum nanoparticles applicable to analyse of the trace concentration of Pb(II), Viet Nam Journal of Chemistry, 2018, 56(4e1), 124-129. 5. Thi Lieu Nguyen, Van Hoang Cao, Thi Dieu Cam Nguyen, Thi Thanh Binh Nguyen, Quoc Trung Pham, Truong Giang Le, Simultaneous effect of pH, deposition time, deposition potential, and step potential on the stripping peak current of lead, and cadmium by response surface methodology, Conference Proceedings, the 6th Analytica Vietnam Conference, 2019, 43 – 50. 6. Thi Lieu Nguyen, Van Hoang Cao, Thi Hai Yen Pham, Truong Giang Le, Fabrication of Nano Flower-shaped Platinum on Glassy Carbon Electrode as a Sensitive Sensor for Lead Electrochemical Analysis, Electroanalysis,2019, 31, 1-9, Doi: 10.1002/elan.201900021 7. Thi Lieu Nguyen, Van Hoang Cao, Thi Hai Yen Pham, Truong Giang Le, Platinum Nanoflower-Modified Electrode as a Sensitive Sensor for Simultaneous Detection of Lead and Cadmium at Trace Levels, Journal of Chemistry, Hindawi, 2019, Doi: 10.1155/2019/6235479. 8. Nguyen Thi Lieu, Cao Van Hoang, Pham Thi Tuyet Le, Le Truong Giang, Simultaneous determination of lead and cadmium in water samples using differential pulse anodic stripping voltammetry at platinum nanoflowers modified glassy electrode, Viet Nam Journal of Chemistry, 2019, 57(3), 379-383. Doi: 10.1002/vjch.201960028. 9. Lê Trường Giang, Nguyễn Thị Liễu, Đánh giá khả năng hoạt động điện hóa của các dạng tồn tại Cd, Pb trong các môi trường điện li sử dụng mô hình cânbằng hóa học, Tạp chí Hóa học, 2019, 57(6E1,2), 103-107. 10. Nguyen Thi Lieu, Pham Quoc Trung, Le Tran Thu Trang, Le Truong Giang, Simultaneous effect of pH, deposition time, deposition potential, and step potential on the stripping peak current of copper on platinum nanoflowers modified glassy carbon electrode (PtNFs/GCE) using response surface methodology, Viet Nam Journal of Chemistry, 2020, 58(3), 302-308. DOI: 10.1002/vjch.201900088. 1 INTRODUCTION 1. The urgency of the thesis Currently, in our country due to the development of industry, agriculture, daily life, transportation, etc., the environment has been seriously polluted, especially heavy metal pollution in the water environment. Heavy metals entering the human body outside the permissible level will cause serious health effects. When exposed to long-term intoxication, the metal accumulates in the body, combined with the cells, can cause cancer. Specifically, with some metals, lead is toxic to the central nervous system, peripheral nervous system, affects the enzyme system with hydrogen-containing activity groups, disturbs the hematopoietic part (bone marrow). Depending on the level of Pb poisoning, people can have abdominal pain, joint pain, kidney inflammation, high blood pressure, st ...