Investigation of Mesoporous Graphitic Carbon Nitride as the Adsorbent to Remove Ni (II) Ions

Xu, Gang; Xia, Yuanjiao; Lv, Yuhua; Liu, Luman; Yu, Bei

doi:10.2175/106143015x14212658613398

Cited by 9 publications

(2 citation statements)

References 40 publications

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“…Nanoporous g-C 3 N 4 (PCN) has a unique nanoporous structure that can effectively increase the specific surface area of the catalysts and the reflection time of visible light, enhance the absorption of visible light, and facilitate carrier transport and mass transfer in the reaction . Templates to prepare PCN include silica nanoparticles, mesoporous silica, SBA15, , KIT-6, etc.…”

Section: Introductionmentioning

confidence: 99%

“…18 Nanoporous g-C 3 N 4 (PCN) has a unique nanoporous structure that can effectively increase the specific surface area of the catalysts and the reflection time of visible light, enhance the absorption of visible light, and facilitate carrier transport and mass transfer in the reaction. 19 Templates to prepare PCN include silica nanoparticles, 20 mesoporous silica, 21 SBA15, 22,23 KIT-6, 24 etc. Goettmann et al 20 calcined cyanamide at 550 °C in the presence of silica nanoparticles (12 nm) and subsequently removed silica to obtain PCN, and the conversion rate was 90% when catalyzing Friedel−Crafts acylation of benzene, which is much higher than BCN (1%).…”

Section: Introductionmentioning

confidence: 99%

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Nanoporous Graphitic Carbon Nitride as Catalysts for Cofactor Regeneration

Sun

Gao

Liao

et al. 2022

ACS Appl. Nano Mater.

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An efficient nicotinamide adenine dinucleotide (NADH) regeneration system is of great significance for the application of oxidoreductase-catalyzed reactions. Photochemical regeneration has been a research hotspot in recent years. Graphite carbon nitride (g-C3N4) has important application prospects. However, bulk g-C3N4 (BCN) has some disadvantages that lead to a low catalytic efficiency. Herein, nanoporous g-C3N4 (PCN) was prepared using silica nanoparticles as templates, and the effects of the mass ratio of cyanamide to silica and the particle size of the templates on the structure, optical, and catalytic properties of PCN were investigated. Then, cyanamide was separately co-polymerized with two types of thiophene compounds and imidazole-, benzene-, and quinolone-based compounds, and the effects of the structure and number of aromatic rings introduced into PCN on the properties of catalysts were studied. The results show that PCN had much better catalytic performance than BCN, the initial reaction rate of NADH regeneration could be upgraded from 18.01 to 37.14 mmol/(g·min) after PCN was modified with thiophene compound, and the yield of NADH after 20 min increased from 56.8 to 82.7%. When other aromatic compounds were added in the PCN preparation process, a catalytic performance similar to that of thiophene-modified PCN was acquired.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nanoporous Graphitic Carbon Nitride as Catalysts for Cofactor Regeneration

Sun

Gao

Liao

et al. 2022

ACS Appl. Nano Mater.

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Single Atom Catalysts on Carbon‐Based Materials

2018

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Metal particle size is an important parameter to consider when looking at supported catalyst performances. As for other properties, surface reactivity of metallic nanoparticles is thus highly size‐dependent. The smallest size that can be reached for this type of object is of course the isolated atom deposited on a support. The preparation of single‐atom catalysts (SAC) is not trivial, since to avoid clustering, the mean adsorption energy of the metal on the support should be higher than its cohesive energy. The choice of a support that allows a strongly interacting environment with the metal is therefore a key step in the preparation of such catalysts. The spectrum of carbon (nano)materials is very broad, and their structure as well as their surface chemistry, although sometime complex, can be tuned and exploited for the stabilization of SAC. This Review summarizes in a comprehensive manner experimental and computational studies aiming at: i) preparing SAC on carbon materials, ii) understanding the metal‐support interactions in SAC, and iii) studying how this relates to catalytic performances. The use of SAC follows well the needs dictated by society (energy and environment issues), and many studies have already been published in various fields, such as thermal catalysis, photocatalysis and electrocatalysis.

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