Self-assembly of honeycomb-like calcium-aluminum-silicate-hydrate (C-A-S-H) on ceramsite sand and its application in photocatalysis

Du, Zhao; Gao, Yining; Nie, Shuai; Liu, Zhichao; Wang, Fazhou; Liu, Peng; Hu, Shuguang

doi:10.1016/j.cej.2018.03.074

Cited by 43 publications

(3 citation statements)

References 51 publications

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“…As the core of photocatalysis, charge transfer at the solid/water interface has been proven to dominate the elec-trochemical kinetics of the photoactive materials [18], and this rate-limiting charge transfer reaction is closely related to the surface concentrations of carriers and reactants. On this basis, increasing effort has been devoted to construct hierarchical porous nanostructures, which will undoubtedly endow the photoactive materials with better solar absorption and electron transfer abilities [19][20][21]. In detail, the effectiveness of the nano-and mesopores is strongly associated with the large accessible surface area, thereby offering more active sites or interfacial area for carrier generation and charge transfer [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of bimodal macroporous g-C3N4/SnO2 nanohybrids with enhanced photocatalytic activity

Chen

Jiang

et al. 2019

Science Bulletin

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Section: Introductionmentioning

confidence: 99%

Facile synthesis of bimodal macroporous g-C3N4/SnO2 nanohybrids with enhanced photocatalytic activity

Chen

Jiang

et al. 2019

Science Bulletin

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“…In Figure 11b, the NaAl(SO 4 ) 2 •12H 2 O and CaAl 2 Si 2 O 8 •4H 2 O diffraction peaks were more obvious, and there were more water silica-aluminate bulge-type diffusion peaks, while the characteristic diffraction peaks of quartz, albite and portlandite occurred significantly less. The reasons for this phenomenon may be as follows: On the surface of FAC, there is a certain amount of active fly ash, with which a large amount of free Ca(OH) 2 will aggregate and bind, so the characteristic peak of Ca(OH) 2 is reduced [26][27][28]. Fly ash has higher activity than rock powder, so more hydration products are generated.…”

Section: X-ray Diffractionmentioning

confidence: 99%

Preparation, Properties and Microstructure of Non-Calcination Rock Powder Brick with Orthogonal Experiments

Fan

Wang

2021

Applied Sciences

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In this paper, the preparation method and reasonable mix ratio of non-calcination brick with rock powder, cement, lime and fly ash ceramsite (FAC) as the raw materials were experimentally evaluated. To better understand the effects of each component on the performance of non-calcination rock powder brick (NCRPB), an orthogonal experimental design was conducted with the water–cement ratio (W/C), rock powder–cement ratio (R/C), lime content (wl) and FAC content (wf) as the main factors, which involved four factors and three factor levels. According to the orthogonal experimental design, the compressive strength, water resistance and bulk density of nine groups of NCRPB specimens were tested. The results show that R/C was the most important factor affecting the compressive strength and water resistance, while the FAC content influenced the bulk density of NCRPB greatly. In this study, the reasonable mix of W/C, R/C, wl, and wf in weight was 0.6, 3.0, 30% and 21%, respectively. In addition, the microstructure and strength formation mechanism of NCRPB were analyzed by using SEM and XRD. The test results show that the rock powder having pozzolanic activity could react with the additional Ca(OH)2 to produce hydration products, leading to the improvement of the performance of NCRPB.

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“…Lightweight ceramsites, as an artificial lightweight aggregate with a hard surface and porous structure inside, are widely used in construction, environmental industries, and other fields owing to their characteristics of lightweight, thermal insulation, and excellent durability (He et al, 2015;Ji et al, 2015;Xie et al, 2016;Lau et al, 2017;Zhao et al, 2018;Hao et al, 2019). The raw materials for normal building ceramsites mainly include natural minerals such as shale and clay (Başaran Bundur et al, 2017;Ahmad and Chen, 2019;Omar Ahmed and Hassan Assem, 2021).…”

Section: Introductionmentioning

confidence: 99%

Preparation and properties of lightweight and high-strength building ceramsites with oil-based drilling cuttings pyrolysis residues

Wang,

Li,

Lin

et al. 2023

Front. Mater.

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With the continuing advancement in China’s exploration and development technologies of shale gas resources, there was a significant increase in shale gas oil-based drilling cuttings. In this paper, oil-based drilling cutting pyrolysis residues (ODCPRs) was used as the main raw material for preparing lightweight and high-strength building ceramsites to eliminate the environmental risks and recycle industrial waste. Firstly, orthogonal experiments were used to study the influences of raw material composition, preheating temperature, preheating time, sintering temperature, and sintering time on the properties of building ceramsites. From the results, the sintering temperature and the content of ODCPRs were discovered to be the key factors affecting the sintering process of ceramsites. Secondly, the influences of sintering temperature and heating rate on the properties of building ceramists were further explored to find the optimum sintering conditions. When the content of ODCPRs in the ceramsite was set to be 50%, the obtained building ceramsites presented excellent properties with particle compressive strength of 6.31 MPa, bulk density of 575.11 kg/m3, apparent density of 1097.24 kg/m3, and the water absorption of 1.89%. Finally, XRD, SEM, TG-DSC, and heavy metal leaching experiments were comprehensively conducted to analyze the composition structure variation and sintering mechanism of the building ceramsite. This paper presents an approach for the recycling, utilization, and disposal of oil-based drilling cuttings in the oil field waste management.

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Self-assembly of honeycomb-like calcium-aluminum-silicate-hydrate (C-A-S-H) on ceramsite sand and its application in photocatalysis

Cited by 43 publications

References 51 publications

Facile synthesis of bimodal macroporous g-C3N4/SnO2 nanohybrids with enhanced photocatalytic activity

Facile synthesis of bimodal macroporous g-C3N4/SnO2 nanohybrids with enhanced photocatalytic activity

Preparation, Properties and Microstructure of Non-Calcination Rock Powder Brick with Orthogonal Experiments

Preparation and properties of lightweight and high-strength building ceramsites with oil-based drilling cuttings pyrolysis residues

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