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Optimized porous clay heterostructure for removal of acetaldehyde and toluene from indoor air

Pu ZHAO,Lizhong ZHU

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 2,   Pages 219-228 doi: 10.1007/s11783-014-0760-z

Abstract: In this study, a series of new porous clay heterostructure (PCH) adsorbents with various ratios of micropores

Keywords： porous clay heterostructure     volatile organic compounds     adsorption     adsorbent     indoor air    

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Oxygen-deficient MoO/NiS heterostructure grown on nickel foam as efficient and durable self-supported

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 4,   Pages 437-448 doi: 10.1007/s11705-022-2228-1

Abstract: oxygen-deficient amorphous MoOx outside in situ grow on Ni foam (NF), to assembly the heterostructurecalculations confirm that the existing oxygen vacancy and MoOx/Ni3S2 heterostructureThe heterostructure effectively decreases the formation energy of O vacancy, leading to surface reconstruction

Keywords： molybdenum oxides     oxygen vacancies     heterostructure     electrocatalysts     hydrogen evolution reaction    

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Bearing and uplift capacities of under-reamed piles in soft clay underlaid by stiff clay using lower-bound

Mantu MAJUMDER, Debarghya CHAKRABORTY

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 537-551 doi: 10.1007/s11709-021-0708-x

Abstract: Ensuring a safe foundation design in soft clay is always a challenging task to engineers.In the present study, the effectiveness of under-reamed piles in soft clay underlaid by stiff clay iswith the increase in the length-to-shaft-diameter ratio ( / ) and adhesion factors in soft clay ( )and stiff clay ( ).and soft clay underlaid by stiff clay.

Keywords： bearing capacity     uplift capacity     under-reamed pile     clay     limit analysis    

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Engineering the electronic and geometric structure of VO/BN@TiO heterostructure for efficient aerobic

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 3,   Pages 276-287 doi: 10.1007/s11705-022-2242-3

Abstract: Particle size governs the electronic and geometric structure of metal nanoparticles (NPs), shaping their catalytic performances in heterogeneous catalysis. However, precisely controlling the size of active metal NPs and thereafter their catalytic activities remain an affordable challenge in ultra-deep oxidative desulfurization (ODS) field. Herein, a series of highly-efficient VOx/boron nitride nanosheets (BNNS)@TiO2 heterostructures, therein, cetyltrimethylammonium bromide cationic surfactants serving as intercalation agent, BNNS and MXene as precursors, with various VOx NP sizes were designed and controllably constructed by a facile intercalation confinement strategy. The properties and structures of the prepared catalysts were systematically characterized by different technical methods, and their catalytic activities were investigated for aerobic ODS of dibenzothiophene (DBT). The results show that the size of VOx NPs and V5+/V4+ play decisive roles in the catalytic aerobic ODS of VOx/BNNS@TiO2 catalysts and that VOx/BNNS@TiO2-2 exhibits the highest ODS activity with 93.7% DBT conversion within 60 min under the reaction temperature of 130 °C and oxygen flow rate of 200 mL·min–1, which is due to its optimal VOx dispersion, excellent reducibility and abundant active species. Therefore, the finding here may contribute to the fundamental understanding of structure-activity in ultra-deep ODS and inspire the advancement of highly-efficient catalyst.

Keywords： oxidative desulfurization     boron nitride     vanadium     MXene     intercalation confinement    

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Model testing of tripod caisson foundations in silty clay subjected to eccentric lateral loads

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 3,   Pages 467-476 doi: 10.1007/s11709-023-0933-6

Abstract: the bearing capacities of tripod caisson foundations subjected to eccentric lateral loads in silty clay

Keywords： tripod caisson foundation     silty clay     eccentric lateral capacity     model tests    

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Behavior of compacted clay-concrete interface

R. R .SHAKIR, Jungao ZHU

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 1,   Pages 85-92 doi: 10.1007/s11709-009-0013-6

Abstract: Tests of interface between compacted clay and concrete were conducted systematically using interfacewater content, normal stress and rough surface on the shear stress-shear displacement relationship of clay-concretedisplacement behavior for both cases of relatively rough and smooth concrete surface except when the claygreater than 16% for the case of rough concrete surface where the shear failure occurs in the body of the claythe interface shear strength increases with increasing water content ratio especially for the case of clay-rough

Keywords： soil structure interaction     simple shear test     interface     friction     compacted clay     interface modeling    

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Analysis of cement-treated clay behavior by micromechanical approach

Dong-Mei ZHANG, Zhen-Yu YIN, Pierre-Yves HICHER, Hong-Wei HUANG

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 2,   Pages 137-153 doi: 10.1007/s11709-013-0204-z

Abstract: Cementation is produced by mixing a certain amount of cement with the saturated clay.purpose of this paper is to model the cementation effect on the mechanical behavior of cement-treated claycompression and undrained triaxial tests under various confining stresses on cement-treated Ariake clayand Singapore clay with various cement contents.micromechanical approach is well adapted for taking into account the main physical properties of cement-treated clay

Keywords： microstructure     cementation     clay     micromechanics     anisotropy     debonding    

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Experimental investigation of the influence on static and cyclic deformation of structural soft clay

CHEN Yunmin, CHEN Yingping, HUANG Bo

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 4,   Pages 422-429 doi: 10.1007/s11709-007-0057-4

Abstract: This paper presents the experimental results performed to study the static and cyclic deformation behavior of undisturbed and remolded soft clays sampling from Xiaoshan. The consolidation tests indicated that the vertical strains of

Keywords： consolidation     deformation     experimental     undisturbed    

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Synthesis, characterization and assessment thermal properties of clay based nanopigments

Mohammad Banimahd KIEVANI, Milad EDRAKI

Frontiers of Chemical Science and Engineering 2015, Volume 9, Issue 1,   Pages 40-45 doi: 10.1007/s11705-015-1505-7

Abstract: Nano-clay based pigments (NCP) are new type of pigments composed of organic dyes and layered silicate-clay

Keywords： nanopigment     layered silicate     cationic dye     thermal properties    

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Ultimate bearing capacity of strip footing resting on clay soil mixed with tire-derived aggregates

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4,   Pages 1016-1024 doi: 10.1007/s11709-021-0751-7

Abstract: This study investigated the use of recycled tire-derived aggregate (TDA) mixed with kaolin as a method of increasing the ultimate bearing capacity ( UBC) of a strip footing. Thirteen 1g physical modeling tests were prepared in a rigid box of 0.6 m × 0.9 m in plan and 0.6 m in height. During sample preparation, 0%, 20%, 40%, or 60% (by weight) of powdery, shredded, small-sized granular (G 1–4 mm) or large-sized granular (G 5–8 mm) TDA was mixed with the kaolin. A strip footing was then placed on the stabilized kaolin and was caused to fail under stress-controlled conditions to determine the UBC. A rigorous 3D finite element analysis was developed in Optum G-3 to determine the UBC values based on the experimental test results. The experimental results showed that, except for the 20% powdery TDA, the TDA showed an increase in the UBC of the strip footing. When kaolin mixed with 20% G (5–8 mm), the UBC showed a threefold increase over that for the unreinforced case. The test with 20% G (1–4 mm) recorded the highest subgrade modulus. It was observed that the UBC calculated using finite element modeling overestimated the experimental UBC by an average of 9%.

Keywords： kaolin     physical modeling tests     stabilization     numerical modeling    

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Adsorption of fluoride on clay minerals and their mechanisms using X-ray photoelectron spectroscopy

Junyi DU, Daishe WU, Huayun XIAO, Ping LI

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 2,   Pages 212-226 doi: 10.1007/s11783-010-0255-5

Abstract: This research investigates the adsorption mechanisms of fluoride (F) on four clay minerals (kaoliniteconcentrations ( = 5–1000 mg·L ), the amount of F adsorbed ( ), amount of hydroxide released by clayAt <5–100 mg·L , clay minerals adsorb H to protonate aluminum-bound surface-active hydroxyl sites inAt low (0.3–1.5 mg·L ), proton transfer occurs, and the F adsorption capabilities of the clay minerals

Keywords： clay mineral     fluoride (F)     adsorption mechanism     X-ray photoelectron spectroscopy (XPS)    

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Retraction note to: Synthesis, characterization and assessment thermal properties of clay based nanopigments

Mohammad Banimahd Kievani,Milad Edraki

Frontiers of Chemical Science and Engineering 2016, Volume 10, Issue 3,   Pages 440-440 doi: 10.1007/s11705-016-1573-3

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Fabricating sustainable lignin-derived porous carbon as electrode for high-performance supercapacitors

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 8,   Pages 1065-1074 doi: 10.1007/s11705-023-2313-0

Abstract: Herein, we propose a method for the preparation of porous carbon from lignin employing an H3porous carbon and investigate its potential for energyAfter assisted hydrothermal treatment followed by carbonization at 800 °C, the lignin-derived porousIn this present study, the resultant lignin-derived porous carbon was used as the electrode of a supercapacitor

Keywords： lignin     porous carbon     electrode     supercapacitor    

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Geotechnical forensic investigation of a slope failure on silty clay soil—A case study

Mohammad Abubakar NAVEED, Zulfiqar ALI, Abdul QADIR, Umar Naveed LATIF, Saad HAMID, Umar SARWAR

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2,   Pages 501-517 doi: 10.1007/s11709-020-0610-y

Abstract: Qila Bala Hisar is one of the noteworthy places of Peshawar, Khyber Pakhtunkhwa. The fort was constructed on a filled ground during the 18th century and it was renovated several times by the occupants ever since. Recently, due to an earthquake of magnitude 7.3, the upper part of the south-western wall of the fort collapsed. The collapse of the wall was attributed to the failure of the retained slope. This research was undertaken to characterize the slope material, study causal factors of failure and evaluate remedial strategy. The investigation involved conventional field and laboratory testing and geophysical investigation using electrical resistivity technique to evaluate the nature of stratum. Also, X-ray Diffraction and Scanning Electron Microscopy was used to study the slope material at a molecular level to evaluate the existence of swelling potential. The analysis has shown that excessive seepage of water caused by the poor maintenance of runoff and sewage drains is the causal factor triggered by the seismic event. A remedial strategy involving soil nails, micro piles and improvement of the surface drainage is recommended.

Keywords： forensic geotechnical investigation     slope failure     slope analysis     finite element method     numerical analysis     seismic loading     Qila Bala Hisar    

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Nonlinear elastic model for compacted clay concrete interface

R. R. SHAKIR, Jungao ZHU

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 2,   Pages 187-194 doi: 10.1007/s11709-009-0033-2

Abstract: In this paper, a nonlinear elastic model was developed to simulate the behavior of compacted clay concreteThe clay soil used in the test was collected from the “Shuang Jang Kou” earth rockfill dam project.

Keywords： interface modeling     friction     soil structure interface     soil structure interaction     simple shear test    

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Title Author Date Type Operation

Optimized porous clay heterostructure for removal of acetaldehyde and toluene from indoor air

Pu ZHAO,Lizhong ZHU

Journal Article

Oxygen-deficient MoO/NiS heterostructure grown on nickel foam as efficient and durable self-supported

Journal Article

Bearing and uplift capacities of under-reamed piles in soft clay underlaid by stiff clay using lower-bound

Mantu MAJUMDER, Debarghya CHAKRABORTY

Journal Article

Engineering the electronic and geometric structure of VO/BN@TiO heterostructure for efficient aerobic

Journal Article

Model testing of tripod caisson foundations in silty clay subjected to eccentric lateral loads

Journal Article

Behavior of compacted clay-concrete interface

R. R .SHAKIR, Jungao ZHU

Journal Article

Analysis of cement-treated clay behavior by micromechanical approach

Dong-Mei ZHANG, Zhen-Yu YIN, Pierre-Yves HICHER, Hong-Wei HUANG

Journal Article

Experimental investigation of the influence on static and cyclic deformation of structural soft clay

CHEN Yunmin, CHEN Yingping, HUANG Bo

Journal Article

Synthesis, characterization and assessment thermal properties of clay based nanopigments

Mohammad Banimahd KIEVANI, Milad EDRAKI

Journal Article

Ultimate bearing capacity of strip footing resting on clay soil mixed with tire-derived aggregates

Journal Article

Adsorption of fluoride on clay minerals and their mechanisms using X-ray photoelectron spectroscopy

Junyi DU, Daishe WU, Huayun XIAO, Ping LI

Journal Article

Retraction note to: Synthesis, characterization and assessment thermal properties of clay based nanopigments

Mohammad Banimahd Kievani,Milad Edraki

Journal Article

Fabricating sustainable lignin-derived porous carbon as electrode for high-performance supercapacitors

Journal Article

Geotechnical forensic investigation of a slope failure on silty clay soil—A case study

Mohammad Abubakar NAVEED, Zulfiqar ALI, Abdul QADIR, Umar Naveed LATIF, Saad HAMID, Umar SARWAR

Journal Article

Nonlinear elastic model for compacted clay concrete interface

R. R. SHAKIR, Jungao ZHU

Journal Article