Mesoporous carbon nitride for adsorption and fluorescence sensor of N-nitrosopyrrolidine

Sam, Mei Shie; Lintang, Hendrik Oktendy; Sanagi, Mohd Marsin; Lee, Siew Ling; Yuliati, Leny

doi:10.1016/j.saa.2013.12.113

Cited by 26 publications

(49 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the difference of the charge between the emission sites and the nitrate ions, the most possible interactions between PVP and nitrate ions would be electrostatic interactions. Similar interactions have been proposed for the interactions between nitrates and polypyrrole [22], nitro-containing compounds with polymers [11,26,27]. In the presence of the same concentration of nitrate ions, especially at high concentrations, it was obviously observed that the C=O sites were more quenched than the N-C sites.…”

Section: Quenching Testssupporting

confidence: 72%

“…The conjugated polymers have received particular attentions with their wide applications in batteries [6], organic light emitting diodes [2,4,7], and sensor [2,[4][5][6][8][9][10], due to their unique metallic and semiconducting properties [4] as well as the fluorescence properties [4,5,11]. On the other hand, the non-conjugated polymers are less explored and still poorly understood.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Polyvinylpyrrolidone as a New Fluorescent Sensor for Nitrate Ion

Ing¹,

Sundari²,

Lintang³

et al. 2016

MJAS

Self Cite

View full text Add to dashboard Cite

In this study, non-conjugated polyvinylpyrrolidone(PVP) was investigated for the first time as the potential polymeric material to sense nitrate ions by fluorescence spectroscopy. The PVP was diluted into various concentrations (3-10%) and they were used to sense the nitrate ions in different concentrations (0.1-100 mM). The PVP showed two excitation peaks at 285 and 330 nm due to the presence of C=O and N-C groups, respectively. One strong emission at 400 or 408 nm was observed with the excitation at 285 or 330 nm. The higher value of quenching constant at excitation wavelength of 285 nm indicated that C=O site was more favored for NO 3 -ions sensing than the N-C site. The PVP 7% gave the highest quenching constant; where the K SV value was 9.89 × 10 -3 mM -1 and 2.44 × 10 -3 mM -1 for excitation at 285 and 330 nm, respectively. The sensing capability was evaluated in the presence of interference ions (SO 4 2-, HCO 3 -, Cl -, and OH -). It was observed that the interference ions interacted strongly with the C=O, but weakly with the N-C. Therefore, in the presence of the interference ions, the PVP would be a potential fluorescent sensor when it is excited at 330 nm.Keywords: polyvinylpyrrolidone; fluorescent sensor; nitrate ions; quenching Abstrak Dalam kajian ini, polivinilpirolidon (PVP) yang bersifat bukan konjugat dikaji untuk kali pertama sebagai bahan polimer yang berpotensi untuk mengesan ion nitrat dengan spektroskopi pendaflour. PVP dicairkan kepada kepekatan yang berlainan (3-10%) dan digunakan untuk mengesan ion nitrat dalam kepekatan yang berbeza (0.1-100 mM). PVP menunjukkan dua puncak pengujaan pada 285 and 330 nm dengan kewujudan C=O dan N-C masing-masing. Satu puncak pemancaran yang tinggi pada 400 atau 408 nm diperolehi dengan pengujaan pada 285 atau 330 nm. Pemalar pelidap kejutan dengan nilai yang lebih tinggi pada puncak pengujaan 285 nm menunjukkan bahawa tapak C=O lebih cenderung untuk mengesan ion NO 3 -daripada tapak N-C. PVP 7% memberi pemalar pelidap kejutan yang paling tinggi, dengan nilai K SV 9.89 × 10 -3 mM -1 and 2.44 × 10 -3 mM -1 untuk puncak pengujaan pada 285 dan 330 nm masing-masing. Kemampuan pengesanan dinilai dengan kehadiran ion gangguan (SO 4 2-, HCO 3 -, OH -, and Cl -). Hasil kajian menunjukkan bahawa ion gangguan berinteraksi kuat dengan C=O, tetapi lemah dengan N-C. Oleh itu, dengan kehadiran ion gangguan, PVP berpotensi menjadi pendafluor sensor pada tapak pengujaan 330 nm.Kata kunci: polivinilpirolidon; pengesan pendaflour, ion nitrat, pelidap kejutan

show abstract

Section: Quenching Testssupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Polyvinylpyrrolidone as a New Fluorescent Sensor for Nitrate Ion

Ing¹,

Sundari²,

Lintang³

et al. 2016

MJAS

Self Cite

View full text Add to dashboard Cite

show abstract

“…Fig. 6,13,18 Both materials have a graphite-like structure with an intense type of interlayer stacking peak (002) at 2q of 27.30 , corresponding to an interlayer distance of 0.33 nm, while the weak peak immersed at 2q of 13.10 was denoted as in-planar repeating units in distance of 0.68 nm. As shown in the Fig.…”

Section: Resultsmentioning

confidence: 99%

“…6,13,15,16,18 Pale yellow powder of BCN was obtained when the cyanamide precursor was calcined at a rate of 2.2 K min À1 to reach the temperature of 823 K and it was held for 4 h. The MCN was synthesized by addition of an appropriate amount of cyanamide to the colloidal silica solution where mass ratio was xed to 1. 6,13,15,16,18 Pale yellow powder of BCN was obtained when the cyanamide precursor was calcined at a rate of 2.2 K min À1 to reach the temperature of 823 K and it was held for 4 h. The MCN was synthesized by addition of an appropriate amount of cyanamide to the colloidal silica solution where mass ratio was xed to 1.…”

Section: Preparation Of Materialsmentioning

confidence: 99%

Mesoporous carbon nitride as a metal-free catalyst for the removal of aniline

Sam

Tiong

Lintang³

et al. 2015

RSC Adv.

Self Cite

View full text Add to dashboard Cite

Mesoporous carbon nitride (MCN) was used for the first time as a thermal catalyst for the removal of aniline. While bulk carbon nitride (BCN) and mesoporous silica (MCM-41) did not show any catalytic activities, the MCN showed aniline removal (33%) at 398 K. It was revealed that the much higher activity of the MCN originated from the presence of mesoporosity and suitable adsorption sites for the reaction to occur.The nature of aniline adsorption on MCN was found to fit well to the Freundlich adsorption model. The evidence on the interactions between aniline and MCN was supported by fluorescence and FTIR spectroscopies. It was suggested that the interactions between MCN and aniline involved both weak p to p stacking and strong hydrogen bonding, which were important to initiate the catalytic removal of aniline.

show abstract

“…Since the activity of the ZnO-C 3 N 4 samples were evaluated under visible light irradiation, the charge transfer mechanism was investigated from the C 3 N 4 site. The C 3 N 4 exhibited two excitation peaks around 277 and 370 nm The excitation peaks at 277 nm would be related to the N=C groups of aromatic 1,3,5-triazine, while the peak of 370 nm would be due to the terminal N-C group of C 3 N 4 [14,22]. In order to investigate the effect of addition of ZnO on the emission of the C 3 N 4 , the emission spectra of the C 3 N 4 and the ZnO-C 3 N 4 samples were measured at the excitation wavelength of 277 and 370 nm, as shown in Figure 4.…”

Section: Results and Discussion Properties Of C 3 N 4 Zno And Zno-cmentioning

confidence: 99%

ENHANCED ACTIVITY OF C3N4 WITH ADDITION OF ZnO FOR PHOTOCATALYTIC REMOVAL OF PHENOL UNDER VISIBLE LIGHT

Hussin¹,

Lintang²,

Yuliati

2016

MJAS

Self Cite

View full text Add to dashboard Cite

Phenol is a stable and hazardous compound that is commonly found as an industrial effluent. Phenol can be treated by photocatalysis using zinc oxide (ZnO) as a photocatalyst. Unfortunately, the use of ZnO in photocatalysis is limited due to the poor response to the visible light. On the other hand, carbon nitride (C 3 N 4 ) is able to absorb visible light. In the present study, a series of ZnO-C 3 N 4 was prepared by impregnation method. The effect of zinc to carbon mol ratio (Zn/C) on the properties and photocatalytic activity was examined. X-ray Diffraction (XRD) patterns of the samples revealed that as the Zn mol ratio increased, the intensity of diffraction peaks for ZnO also increased but the intensity for C 3 N 4 decreased. All prepared composite materials have an extended absorption band in the visible light region due to the presence of C 3 N 4 , as supported by DR UV-Vis spectra. The prepared ZnO-C 3 N 4 composites were further investigated in the photocatalytic removal of phenol under visible light for 5 hours. All ZnO-C 3 N 4 samples showed higher activity than the bare ZnO with Zn/C mol ratio of 1% showed the highest photocatalytic activity for removal of phenol among all the samples. The high activity observed on the ZnO-C 3 N 4 would be due to role of ZnO to suppress electron-hole recombination and C 3 N 4 to extend the absorption of ZnO in the visible light region.Keywords: zinc oxide, carbon nitride, ZnO-C 3 N 4 composites, impregnation method, phenol Abstrak Fenol adalah sebatian stabil dan berbahaya yang sering dijumpai sebagai efluen industri. Fenol boleh dirawat dengan cara fotopemangkinan menggunakan zink oksida (ZnO) sebagai fotomangkin. Malangnya, penggunaan ZnO di dalam fotopemangkinan adalah terhad disebabkan sedikit respons terhadap sinaran tampak. Sebaliknya, karbon nitrida (C 3 N 4 ) mampu menyerap sinaran tampak. Dalam kajian ini, siri ZnO-C 3 N 4 telah disediakan melalui kaedah pengisitepuan. Kesan nisbah mol zink kepada karbon (Zn/C) kepada ciri dan aktiviti fotomangkin telah diperiksa. Corak pembelauan sinar-x (XRD) daripada sampel -sampel membuktikan bahawa kesan nisbah mol Zn meningkat, keamatan puncak pembelauan untuk ZnO semakin naik tetapi keamatan untuk C 3 N 4 semakin kurang. Semua bahan komposit yang disediakan mampu memperluaskan jalur penyerapan di dalam kawasan sinaran tampak disebabkan kehadiran C 3 N 4 dan disokong oleh spectrum DR UV-Vis. Komposit ZnO-C 3 N 4 yang disediakan selanjutnya dikaji di dalam fotomangkin penyingkiran fenol di bawah sinaran tampak selama 5 jam. Kesemua sampel ZnO-C 3 N 4 mempunyai aktiviti yang tinggi berbanding hanya ZnO dengan 1% nisbah mol Zn/C menunjukkan aktiviti fotomangkin tertinggi dalam penyingkiran fenol. Aktiviti tinggi yang dilihat terhadap ZnO-C 3 N 4 berkemungkinan disebabkan peranan ZnO untuk membantutkan penggabungan semula lubang elektron dan C 3 N 4 untuk memperluaskan penyerapan ZnO di dalam kawasan sinaran tampak. [1 -9]. The ZnO has been investigated due to its unique property of wide band gap (3.37 eV), excitat...

show abstract

Mesoporous carbon nitride for adsorption and fluorescence sensor of N-nitrosopyrrolidine

Cited by 26 publications

References 35 publications

Polyvinylpyrrolidone as a New Fluorescent Sensor for Nitrate Ion

Polyvinylpyrrolidone as a New Fluorescent Sensor for Nitrate Ion

Mesoporous carbon nitride as a metal-free catalyst for the removal of aniline

ENHANCED ACTIVITY OF C3N4 WITH ADDITION OF ZnO FOR PHOTOCATALYTIC REMOVAL OF PHENOL UNDER VISIBLE LIGHT

Contact Info

Product

Resources

About