Hydrophobic Polypropylene Glycol Integration into the Micelles: A General Approach for High Utilization Efficiency of Organic Template

Cui, Han; Zhen, Fei; Liu, Honghai; Gao, Xionghou; Yue, Yuanyuan; Liu, Haiyan; Liu, Hongtao

doi:10.1021/acs.iecr.1c01500

Cited by 6 publications

(4 citation statements)

References 41 publications

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“…In addition, our group synthesized hydrothermally stable MAs via the self-assembly of zeolite Y and β precursors . Moreover, the novel strategy could decrease the synthesis cost by utilizing composite templates, such as P123/SDS, P123/SDMBS, P123/PVA, P123/PPG, P123/AES, and P123/Urea . Unfortunately, these innovative procedures are complicated to operate and difficult to be extended to other synthesis systems.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Well-Ordered Mesoporous Aluminosilicates with High Aluminum Contents: The Challenge and the Promise

Yi-xiong

Zhou

et al. 2022

Inorg. Chem.

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has recently emerged as a potential material for the catalytic conversion of large molecules. Usually, SBA-15 has a low content of aluminum due to the conventional acidic synthesis medium. Although a few approaches have been adopted to prepare Al−SBA-15 with a high alumina content, it is still challenging to prepare well-ordered Al−SBA-15 with a high alumina content. Here, we demonstrate a facile synthesis process in neutral mediums for the grafting of Al into the framework of SBA-15. This approach relies mainly on the dissociation of Si−O−Si bonds and the polymerization of Si−O−Si/Al bonds promoted by sodium persulfate (SPS) in neutral mediums. In this way, well-ordered Al−SBA-15 with a high aluminum content and enhanced acidity was obtained. Results of X-ray fluorescence spectroscopy (XRF) showed an n(SiO 2 )/n(Al 2 O 3 ) ratio of 13.7, much lower than that of the conventional sample (21.7) obtained in acidic medium. The characterization results indicated the presence of a wellordered Al-containing mesophase with high hydrothermal stability. Notably, the Al content and the acidity of Al−SBA-15 can be tuned by changing the SPS amount.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Well-Ordered Mesoporous Aluminosilicates with High Aluminum Contents: The Challenge and the Promise

Yi-xiong

Zhou

et al. 2022

Inorg. Chem.

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“…For comparison, the conventional synthesis procedure of SBA-15 required 1.92 g of template, 1.12 g of H 2 SO 4 , and 75 g of H 2 O . To decrease the consumption of raw materials, composite templates (such as P123/SDS, P123/SDMBS, P123/PVA, P123/PPG, P123/AES, and P123/Urea) were developed to enhance the hydrophilicity of micelles in high-concentration template solutions. As a result of this, the consumption of the organic template and H 2 O decreased significantly.…”

Section: Resultsmentioning

confidence: 99%

“…The reason is that these syntheses mostly involve a dilute template solution, which is requisite for the activity of micelles. On the basis of this, composite templates such as SDS/P123, SDMBS/P123, PVA/P123, PPG/P123, AES/P123, and urea/P123 were adopted to enhance the hydrophilicity of micelles in high-concentration template solutions. As a direct result of this, the consumption of water and organic templates decreased greatly.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Mesoporous Aluminosilicates with Moderate Acidity and High Hydrothermal Stability by Acid-Free Method

Liu,

Zhou,

et al. 2023

Ind. Eng. Chem. Res.

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Mesoporous aluminosilicates (MAs) are promising catalytic materials for large molecule cracking. However, this material still suffers from poor stability and weak acidity. Synthesis of MAs with enhanced acidity and excellent hydrothermal stability is very desirable. In this study, we propose the facile obtaining of hydrothermally stable Al-SBA-15 with moderate acidity by using a sodium persulfate strategy in an acid-free medium. The obtained Al-SBA-15 exhibits large surface areas (430 m 2 /g), superior hydrothermal stability (in pure water vapor at 800 °C), and desirable properties of acidity. The dependence of XRD patterns, porosity structure, hydrothermal stability, and intrinsic acidity of the synthesized MAs on Al species introduction content is established. The obtained MAs exhibited much improved catalytic cracking performance for heavy oil in microactivity test system units, compared with the conventional SBA-15 with pure silica and weak acidity.

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“…MAs have been attracting intense research interest due to their large pores and high surface area. − Improving hydrothermal stability is crucial for their practical applications but challenging in the industrial process. To settle this issue, the author’s group obtained hydrothermally stable MAs via the self-assembly of zeolite Y precursors. − However, a means to synthesize MAs with hydrothermal stability with decreased consumption amounts of organic surfactants and water is still a challenging goal.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Mesoporous Aluminosilicates with Decreased Dosage of Organic Template and Water: Insights into the HLB Effect of the Cotemplate

Gao

et al. 2022

Ind. Eng. Chem. Res.

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Mesoporous aluminosilicates (MAs) with high hydrothermal stability had been synthesized via assembly of typical microporous zeolite Y precursors. However, the high consumption amount of the P123 template and water is still an obstacle to its industrial application. Synthesis of hydrothermally stable mesoporous aluminosilicates (MAs) in a high-concentration-template solution is a promising strategy to decrease the consumption amount of organic template and water. A means to prevent the clumping of micelles in the high-concentration system is of vital importance in the synthesis of MAs. In the present investigation, the goal was achieved by the introduction of a cotemplate with a high hydrophilic−lipophilic balance (HLB) value into F68 micelles. The effect of a cotemplate with different HLBs on the physicochemical properties of MA products was investigated. Compared with cotemplate sodium dodecyl dimethylbenzene sulfonate (SDMBS) of HLB 9.7 and fatty alcohol polyoxyethylene ether-9 (AEO-9) of HLB 13.5, octyl phenol polyoxyethylene ether-10 (OP-10) of HLB 14.1 favored the formation of well-crystallized MAs with maximum integrated intensity, surface area, and hydrothermal stability. The improvement of physicochemical properties could be attributed to the increase in overall hydrophilicity of composite micelles. As a result of this, well-ordered MAs were obtained with greatly decreased consumption of F68 and water.

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Hydrophobic Polypropylene Glycol Integration into the Micelles: A General Approach for High Utilization Efficiency of Organic Template

Cited by 6 publications

References 41 publications

Synthesis of Well-Ordered Mesoporous Aluminosilicates with High Aluminum Contents: The Challenge and the Promise

Synthesis of Well-Ordered Mesoporous Aluminosilicates with High Aluminum Contents: The Challenge and the Promise

Synthesis of Mesoporous Aluminosilicates with Moderate Acidity and High Hydrothermal Stability by Acid-Free Method

Preparation of Mesoporous Aluminosilicates with Decreased Dosage of Organic Template and Water: Insights into the HLB Effect of the Cotemplate

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