MARC details
| 000 -LEADER |
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| fixed length control field |
02787nam a22003017a 4500 |
| 003 - CONTROL NUMBER IDENTIFIER |
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| control field |
OSt |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
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| control field |
20241113132713.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
241113b |||||||| |||| 00| 0 eng d |
| 040 ## - CATALOGING SOURCE |
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| Original cataloging agency |
TUPM |
| Language of cataloging |
English |
| Transcribing agency |
TUPM |
| Modifying agency |
TUPM |
| Description conventions |
rda |
| 050 ## - LIBRARY OF CONGRESS CALL NUMBER |
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| Classification number |
BTH RB 37 |
| Item number |
C36 2024 |
| 100 ## - MAIN ENTRY--PERSONAL NAME |
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| Personal name |
Canosa, Joab C. |
| Relator term |
author |
| 245 ## - TITLE STATEMENT |
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| Title |
Flourescent carbon dots synthesized from guave (Psidium guajava) leaves for the selective detection of Fe3+ ions at different concentration/ |
| Statement of responsibility, etc. |
Joab C. Canosa, Dwald Jana A. Miranda, and Jillian Mae A. Rivera .-- |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. |
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| Place of publication, distribution, etc. |
Manila: |
| Name of publisher, distributor, etc. |
Technological University of the Philippines, |
| Date of publication, distribution, etc. |
2024. |
| 300 ## - PHYSICAL DESCRIPTION |
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| Extent |
vii, 74pages: |
| Dimensions |
29cm. |
| Accompanying material |
+1 CD-ROM (4 3/4in.) |
| 336 ## - CONTENT TYPE |
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| Source |
rdacontent |
| 337 ## - MEDIA TYPE |
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| Source |
rdamedia |
| 338 ## - CARRIER TYPE |
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| Source |
rdacarrier |
| 500 ## - GENERAL NOTE |
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| General note |
Thesis (undergraduate) |
| 502 ## - DISSERTATION NOTE |
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| Dissertation note |
College of Science .-- |
| Degree type |
Bachelor of Applied Science in Laboratory Technology: |
| Name of granting institution |
Technological University of the Philippines, |
| Year degree granted |
2024. |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE |
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| Bibliography, etc. note |
Includes bibliography: |
| 520 ## - SUMMARY, ETC. |
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| Summary, etc. |
The presence of heavy metal pollutants in water is considered a worldwide threat. Existing<br/>methods of detecting these heavy metals, including ferric ions, are expensive and require<br/>expertise. Therefore, a facile synthesis and use of fluorescent carbon dots for the selective<br/>detection of ferric ions was explored. Fluorescent carbon dots were produced via<br/>solvothermal synthesis using guava leaves as a precursor for the selective detection of Fe3+<br/>ions. The resulting guava carbon dots (G-CDs) were characterized using UV-Vis, FTIR,<br/>TEM-EDS, and a Spectrofluorophotometer. UV-Vis analysis revealed distinct peaks at 664<br/>nm and 298 nm. FTIR analysis indicated the presence of various functional groups,<br/><br/>including O-H stretching, C-H stretching, C=C stretching, C-O stretching, and C-H out-of-<br/>plane bend. TEM imaging revealed an average particle size of G-CDs measuring 8.7 nm<br/><br/>with a quasi-spherical shape. EDS analysis confirmed an abundant presence of element<br/>carbon at 94.9%, with oxygen at 4.8%, and phosphorus at 0.3%. Spectrofluorophotometer<br/>produced a PL spectrum indicating an emission wavelength of 677 nm, corresponding to<br/>the red color of synthesized G-CDs. Selective ion detection of Fe3+ was also observed in<br/>the PL spectra along with the control containing G-CDs and EDTA with the selected metal<br/>ions: Hg2+, Zn2+, Cu2+and Pb2+. PL quenching was exhibited towards Fe3+ with no<br/>quenching for the remaining metal ions. High specificity in detecting Fe3+ was also<br/>observed in the concentration range of 100-400 μM, indicating a decrease in PL quenching. |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Heavy metal pollutants |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Water pollutants |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Solvothermal |
| 700 ## - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Miranda, Dwald Jana A. |
| Relator term |
author |
| 700 ## - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Rivera, Jillian Mae A. |
| Relator term |
author |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
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| Source of classification or shelving scheme |
Library of Congress Classification |
| Koha item type |
Bachelor's Thesis COS |
| Suppress in OPAC |
No |