Effect of activated carbon modified with oxalic acid on the production of IPA from MX catalyzed by H3PW12O40@carbon and cobalt

Fang, Zhou-wen; Liu, Huajie; Wang, Zhi-Hao; Wen, Di; Long, Xiang‐li

doi:10.1016/j.jiec.2018.07.032

Cited by 6 publications

(4 citation statements)

References 48 publications

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“…ZIF-67- n HPW composites ( n = 0.05, 0.2, 0.4) have smaller S BET and V pore which kept decreasing along with the increase of HPW introduction amount. 31 …”

Section: Resultsmentioning

confidence: 99%

“…The textural properties of synthesized adsorbents are shown in Table . ZIF-67- n HPW composites ( n = 0.05, 0.2, 0.4) have smaller S BET and V pore which kept decreasing along with the increase of HPW introduction amount …”

Section: Resultsmentioning

confidence: 99%

“…ZIF-67-n HPW composites (n = 0.05, 0.2, 0.4) have smaller S BET and V pore which kept decreasing along with the increase of HPW introduction amount. 31 The morphologies of adsorbents were analyzed by SEM as shown in Figure 2. The average diameter of dodecagonal ZIF-67 was approximately 1.5 μm.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Integration of Phosphotungstic Acid into Zeolitic Imidazole Framework-67 for Efficient Methylene Blue Adsorption

Shang

Chen

et al. 2022

ACS Omega

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To enhance the dye adsorption capacity of zeolitic imidazolate framework-67 (ZIF-67), phosphotungstic acid (HPW) was integrated into ZIF-67 to prepare composite adsorbents. Characterization results demonstrated that the electronegative HPW was uniformly and tightly deposited on the electropositive ZIF-67. Methylene blue (MB) was selected as a model contaminant to evaluate the adsorption performance of hybrid adsorbents. Results showed that HPW@ZIF-67 had excellent adsorption capacity toward cationic MB. The optimal ZIF-67-0.2 HPW sample with a HPW dosage of 9.9 wt % presented an adsorption capacity of 446.4 mg g –1 . ZIF-67-0.2 HPW displayed good reusability, and the adsorption data can be well described by pseudo-second order and Langmuir isotherm models. The adsorption mechanism was ascribed to the preferred electrostatic attraction and π–π stacking between MB and composite adsorbents. This work provides a route to enhance organic dye removal efficiency of ZIF materials through regulation of surface charge property and sheds light on the development of ZIF-based adsorbents.

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“…ZIF-67- n HPW composites ( n = 0.05, 0.2, 0.4) have smaller S BET and V pore which kept decreasing along with the increase of HPW introduction amount. 31 …”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Integration of Phosphotungstic Acid into Zeolitic Imidazole Framework-67 for Efficient Methylene Blue Adsorption

Shang

Chen

et al. 2022

ACS Omega

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“…[4][5][6] Wang et al 7 made phosphotungstic acid loaded on carbon perform better as a catalyst in the transformation of MX to IPA by treating the carbon with HNO 3 and found that stronger acidity on the carbon is conducive to producing IPA. Fang et al 8 found that the IPA yield accelerated by phosphotungstic acid loaded on carbon treated with oxalic acid increased up to 58.9% as compared with phosphotungstic acid loaded on the original carbon.…”

Section: Introductionmentioning

confidence: 99%

Isophthalic acid production catalyzed by Co(II) together with phosphotungstic acid loaded on carbon modified with tartaric acid

Wang

Wen

et al. 2020

J of Chemical Tech & Biotech

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Background: Isophthalic acid (IPA) is commercially produced using the Co-Mn-Br catalyst system, which suffers from the shortcomings of the discharge of CH 3 Br and corrosion of equipment. It is necessary to develop a technology to avoid the pollution caused by bromide. The production of IPA from the oxidation of m-xylene (MX) by air is realized under catalysis with H 3 PW 12 O 40 (HPW) loaded on carbon and cobalt. Results: Tartaric acid has been used to improve the catalytic activity of the HPW@C catalyst. Experiments indicate that the best modification condition is calcining the carbon at 450°C for 4 h after being soaked in a 2.0 mol L −1 tartaric acid solution for 10 h. Surface characterization reveals that the tartaric acid modification leads to an increase in the acid groups and a reduction in the basic groups on the carbon surface. Conclusions: The MX conversion obtained using the HPW@C catalyst prepared from modified carbon is 6.77% over that obtained using the HPW@C catalyst prepared from the original carbon. The IPA generated using the former is 71.1% over that generated using the latter. The catalytic activity of the HPW@C catalyst relies on its surface chemical characteristics and physical properties. The surface chemistry plays a more important role than the physical properties.

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Oxidation of Metaxylene to Isophthalic Acid and Its Application

Long

Wang

2023

Industrial Arene Chemistry

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Effect of activated carbon modified with oxalic acid on the production of IPA from MX catalyzed by H3PW12O40@carbon and cobalt

Cited by 6 publications

References 48 publications

Integration of Phosphotungstic Acid into Zeolitic Imidazole Framework-67 for Efficient Methylene Blue Adsorption

Integration of Phosphotungstic Acid into Zeolitic Imidazole Framework-67 for Efficient Methylene Blue Adsorption

Isophthalic acid production catalyzed by Co(II) together with phosphotungstic acid loaded on carbon modified with tartaric acid

Oxidation of Metaxylene to Isophthalic Acid and Its Application

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