000			03444nam a22003017a 4500
003			OSt
005			20250714100359.0
008			250714b |||||||| |||| 00| 0 eng d
040			_aTUPM _bEnglish _cTUPM _dTUPM _erda
050			_aBTH RB 37 _bA73 2025
100			_aAragon, Joraine B. _eauthor
245			_aPhotocatalytic degradation of nonylphenol using nitrogen-doped carbon-based nanoparticles from calamansi peel waste/ _cJoraine B. Aragon, Ederwisa D. Cadigal, and Pia Monica M. Punzal.--
260			_aManila: _bTechnological University of the Philippines, _c2025.
300			_aviii, 86pages: _c29cm.
336			_2rdacontent
337			_2rdamedia
338			_2rdacarrier
500			_aBachelor's thesis
502			_aCollege Of Science.-- _bBachelor of applied science in laboratory technology: _cTechnological University of the Philippines, _d2025.
504			_aIncludes bibliographic references and index.
520			_aWater pollution caused by nonylphenol, an endocrine-disrupting compound, poses a serious environmental concern in several rivers in Metro Manila. This study evaluates the photocatalytic degradation of nonylphenol using nitrogen-doped carbon-based nanoparticles (NC-BNPs) from calamansi peel waste synthesized through the calcination- to-reflux method. Various analytical instruments were used for the characterization of the synthesized C-BNPs and NC-BNPs, such as a UV-Vis Spectrophotometer, a Fourier Transform Infrared Spectrometer, a Scanning Electron Microscope and Energy Dispersive X-ray Spectrometer, and a Spectrofluorophotometer. Results obtained from UV-Vis analysis revealed that NC-BNPs possess enhanced optical properties compared to C-BNPs. These findings were further validated by spectrofluorophotometer results, which displayed broader emission peaks and higher fluorescence intensity for NC-BNPs. The successful incorporation of nitrogen into the C-BNP matrix was confirmed through FTIR analysis, where the presence of a peak at 3297 cm-1—attributed to a primary amide—indicated nitrogen doping. SEM mapping and EDX Spectroscopy further verified the nitrogen- doping as NC-BNPs contained nitrogen with 50.87% weight. Moreover, the morphology and particle size distribution of the NC-BNPs were analyzed using SEM and ImageJ version 1 software. The nanoparticles were of irregular shapes with non-uniform morphology and had an approximate mean size of 15.3 nm with a standard deviation of 3.591, which indicated that there was a wider size distribution range of an integration of small and large particles compared to the average size. Photocatalytic performance was assessed under sunlight exposure, comparing control, C-BNPs, and NC-BNPs setups. Results showed that nonylphenol with NC-BNPs achieved a significantly higher degradation efficiency of 37.13% compared to 14.05% for C-BNPs. Optimization of photocatalytic conditions revealed that pH 6, an initial nonylphenol concentration of 100 ppm, and 3 mL of NC-BNPs yielded the highest degradation rates. The study demonstrates that NC-BNPs derived from agricultural waste present a sustainable and effective solution for degrading harmful organic pollutants in water systems.
650			_aCalcination
650			_aReflux synthesis
650			_aNitrogen doping
700			_aCadigal, Ederwisa D. _eauthor
700			_aPunzal, Pia Monica M. _eauthor
942			_2lcc _cBTH COS _n0
999			_c30323 _d30323