Advances and applications of graphitic carbon nitride as sorbent in analytical chemistry for sample pretreatment: A review

Sun, Ying-pei; Ha, Wei; Chen, Juan; Qi, Huanhuan; Shi, Yan‐Ping

doi:10.1016/j.trac.2016.03.002

Cited by 132 publications

(36 citation statements)

References 103 publications

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“…Then, with the increase in pH, the removal rate decreased slightly at 7 and 8, while at a pH value of 9, the removal rate decreased significantly. This suggests that the adsorption of catechol by g-C 3 N 4 /Fe 3 O 4 materials may be the result of the interaction between charged groups (as described in Table 4 [26,35,36]). The amine groups on the surface of the g-C 3 N 4 /Fe 3 O 4 act as proton acceptors because of the free lone pair electrons on the nitrogen atom and acquire positive surface charges [36].…”

Section: Resultsmentioning

confidence: 99%

“…Thereinto, g-C 3 N 4 (i.e., graphite-phase C 3 N 4 ) is of particular interest. Its unique two-dimensional Graph-like layered stacking structure and sp 2 hybrid π conjugated electron band structure can form strong interactions with analytes such as hydrogen bonds, π–π stacking, electrostatic interactions, Van der Waals forces, and hydrophobic effects, which guarantee g-C 3 N 4 as an excellent adsorbent [25,26,27]. However, g-C 3 N 4 cannot be used directly as an adsorbent because it is prone to reagglomeration when separated from homogeneous solutions.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of Magnetic g-C3N4/Fe3O4 Composite and Its Application in the Separation of Catechol from Water

Peng

2019

Materials

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Catechol has strong toxicity and deformity as well as carcinogenicity, and it is difficult to degrade naturally. Therefore, it is of great practical significance to develop efficient adsorbents to separate catechol from water quickly and effectively. In this work, g-C3N4/Fe3O4 magnetic nanocomposites were prepared using g-C3N4 as the matrix by chemical co-precipitation, mixing with Fe2+ and Fe3+ solutions. Then, g-C3N4/Fe3O4 was used, for the first time, as an adsorbent to investigate the removal rate of catechol under different conditions by the magnetic field separation method. The adsorption parameters of the g-C3N4/Fe3O4 nanocomposite were evaluated by the Langmuir and Freundlich adsorption models. The results showed that the g-C3N4/Fe3O4 nanocomposite presented a two-step adsorption behavior and a considerably high adsorption capacity. The removal rate of catechol reached 70% at the dosage of 50 mg, adsorption time of 30 min, and pH value of 6. Five adsorption–desorption cycles demonstrated that the g-C3N4/Fe3O4 material had good stability and reusability.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation of Magnetic g-C3N4/Fe3O4 Composite and Its Application in the Separation of Catechol from Water

Peng

2019

Materials

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“…As a new nanomaterial, graphitic carbon nitride (g-C3N4) has many attractive merits, ranging from N-rich functional groups and easy surface modification to excellent thermal and chemical stability. 31 In recent years, g-C3N4 has been developed and employed for the separation and preconcentration of organic compounds and metal ions. 31,[32][33][34][35] Although g-C3N4 exhibits great potential as a new sorbent, it has some problems from the DMSPE point of view.…”

Section: Introductionmentioning

confidence: 99%

“…31 In recent years, g-C3N4 has been developed and employed for the separation and preconcentration of organic compounds and metal ions. 31,[32][33][34][35] Although g-C3N4 exhibits great potential as a new sorbent, it has some problems from the DMSPE point of view. Pure g-C3N4 easily aggregates and results in a decrease of its specific surface area.…”

Section: Introductionmentioning

confidence: 99%

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Dispersive Micro-solid Phase Extraction with Fibrous TiO2@g- C3N4 Nanocomposites Coupled with ICP-MS for the Determination of Cobalt and Nickel in Environmental and Biological Samples

Chen¹,

Liu²,

Yan³

et al. 2020

At.Spectrosc.

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In this work, fibrous TiO2@g-C3N4 nanocomposites (FTGCNCs) were used for dispersive micro-solid phase extraction of Co and Ni prior to their determination by inductively coupled plasma mass spectrometry. As a new adsorbent, the surface on FTGCNCs have rich functional groups such as-NH2,-NH-and =N-, which can selectively adsorb target ions. The adsorption behaviors of Co and Ni on FTGCNCs were investigated. The results indicated that the analytes were quantitatively retained on FTGCNCs in the pH range of 5.0-8.0 and eluted completely with 1.0 mL of 0.5 mol L-1 HNO3 solution. The main factors influencing the preconcentration and determination of the analytes were investigated in detail, including the pH of the sample solution, dosage of adsorbent, extraction/elution time, elution parameters and sample volumes. Under the optimum conditions, the detection limits of this method were 0.12 pg mL-1 and 1.34 pg mL-1 for Co and Ni, respectively. The relative standard deviations were 3.9% for Co and 4.8% for Ni (n=9, c=1.0 ng mL-1). This method was used for the determination of trace/ultra-trace Co and Ni in environmental water samples with satisfactory results. In order to verify this method, three certified reference materials of stream sediment, human hair and mussel were analyzed using the proposed method, and the determined results were in agreement with the certified values.

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Interface Engineering of Conjugated Polymer‐Based Composites for Photocatalysis

Xiao

Sun

et al. 2022

Chemistry A European J

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Photocatalysis can create a green way to produce clean energy resources, degrade pollutants and achieve carbon neutrality, making the construction of efficient photocatalysts significant in solving environmental issues. Conjugated polymers (CPs) with adjustable band structures have superior light-absorption capacity and flexible morphology that facilitate contact with other components to form advanced heterojunctions. Interface engineering can strengthen the interfacial contact between the components and further enlarge the interfacial contact area, enhance light absorption, accelerate charge transfer and improve the reusability of the composites. In order to throw some new light on heterojunction interface regulation at a molecular level, herein we summarize CP-based composites with improved photocatalytic performance according to the types of interactions (covalent bonding, hydrogen bonding, electrostatic interactions, π-π stacking, and other polar interactions) between the components and introduce the corresponding interface building methods, identifying techniques. Then the roles of interfaces in different photocatalytic applications are discussed. Finally, we sum up the existing problems in interface engineering of CP-based composites and look forward to the possible solutions.

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Advances and applications of graphitic carbon nitride as sorbent in analytical chemistry for sample pretreatment: A review

Cited by 132 publications

References 103 publications

Preparation of Magnetic g-C3N4/Fe3O4 Composite and Its Application in the Separation of Catechol from Water

Preparation of Magnetic g-C3N4/Fe3O4 Composite and Its Application in the Separation of Catechol from Water

Dispersive Micro-solid Phase Extraction with Fibrous TiO2@g- C3N4 Nanocomposites Coupled with ICP-MS for the Determination of Cobalt and Nickel in Environmental and Biological Samples

Interface Engineering of Conjugated Polymer‐Based Composites for Photocatalysis

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