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Pseudobrookite based heterostructures for efficient electrocatalytic hydrogen evolution

Materials Reports(Energy) 2021年第2期1卷 90-98页

作者： Niranjala Fernando Jayashree Swaminathan Francisco Carlos Robles Hernandez gayan priyadarshana Chanaka Sandaruwan Wenli Yang Veranja Karunaratne Zixing Wang Gehan AJAmaratunga Nilwala Kottegoda Ashokkumar Meiyazhagan Pulickel M.Ajayan Department of Design and Engineering Faculty of Science and TechnologyBournemouth UniversityDorsetBH125BBUK Department of Materials Science&NanoEngineering Rice UniversityTexas77005USA Department of Mechanical Engineering Technology University of HoustonHoustonTX77204USA Materials Science&Engineering Cullen College of EngineeringUniversity of HoustonHoustonTX77204USA Department of Materials and Mechanical Technology Faculty of TechnologyUniversity of Sri JayewardenepuraPitipanaHomagamaSri Lanka Sri Lanka Institute of Nanotechnology PitipanaHomagamaSri Lanka Department of Engineering University of CambridgeCambridgeCB21TNUK Department of Chemistry Center for Advanced Materials ResearchUniversity of Sri JayewardenepuraGangodawilaNugegodaSri Lanka

Synthesis of ultrathin heterostructures has received much attention in the recent past due to their unique physical and chemical *** this work,we report the synthesis of Fe_(2)TiO_(5)–TiO_(2)heterostructures using a simple hydrothermal technique employing natural ilmenite as the *** arranged nanostructures with interconnected nano-petals of thickness around 50 nm are *** electrocatalytic properties of the synthesized Fe_(2)TiO_(5)–TiO_(2)heterostructures are enhanced following the cathodization *** observed enhancement in the synthesized materials’electrocatalytic property can be attributed to the defect-rich Fe_(2-x)TiO_(5-x)-TiO_(2-x)*** current approach and technique discussed in this work offer a simple method to synthesize a nanostructured heterostructure material and create defects for enhancing electrocatalytic activity.

关键词： Heterostructures Cathodization Green catalyst 2D materials Hydrogen evolution Electrocatalysis Pseudobrookite

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Restoration of Koggala lagoon: Modelling approach in evaluating lagoon water budget and flow characteristics

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Journal of Environmental Sciences 2010年第6期22卷 813-819页

作者： gayan Lakendra Gunaratne Norio Tanaka Prasanna Amarasekara Tilak priyadarshana Jagath Manatunge Institute for Environmental Science and Technology Graduate School of Science and EngineeringSaitama University Faculty of Fisheries and Marine Sciences & Technology University of Ruhuna Department of Civil Engineering Faculty of EngineeringUniversity of Moratuwa

Groyne system modification is described related to restoration efforts to Koggaia lagoon, Sri *** large-scale unplanned sand removal at the lagoon mouth shifted the formation of sand bar towards the lagoon and made adverse effects on its ecosystem. After the removal of the natural sand bar, groyne system was constructed to avoid sand deposition in the lagoon and to protect the highway bridge （across the lagoon outlet channel） from the wave attack. The existing groyne system resulted the lagoon mouth being permanently open to sea which in turn led to many environmental problems. Groyne system modification is proposed in this study to reduce the sea water *** budget and two-dimensional depth averaged hydrodynamic model were developed for understanding the hydrologic and flow characteristics of the lagoon. Numerical experiments was performed at lagoon mouth area for two cases：（1） existing condition and （2） proposed rubble mound groyne system condition. Comparison of results was obtained for both cases to describe flow pattern at lagoon mouth. Results further showed, the width should be reduced to a maximum of 40 m. Proposed mouth width （40 m） pushed the salting factor towards 0.5 from 0.68. Salting factor reduction with the groyne modification may result a predominant influence of fresh water which may in turn lead lagoon to a fresh water ecosystem.

关键词： Koggala lagoon hydrodynamic modelling lagoon hydrology

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Effect of seasonal barrier layer on mixed-layer heat budget in the Bay of Bengal

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Acta Oceanologica Sinica 2022年第9期41卷 38-49页

作者： gayan Pathirana Dongxiao Wang Gengxin Chen M.K.Abeyratne Tilak priyadarshana State Key Laboratory of Tropical Oceanography South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou510301China Department of Oceanography and Marine Geology Faculty of Fisheries and Marine Sciences&TechnologyUniversity of RuhunaMatara81000Sri Lanka Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou511458China School of Marine Sciences Sun Yat-sen UniversityGuangzhou519082China Innovation Academy of South China Sea Ecology and Environmental Engineering Chinese Academy of SciencesGuangzhou510301China Department of Mathematics Faculty of ScienceUniversity of RuhunaMatara81000Sri Lanka Department of Limnology and Water Technology Faculty of Fisheries and Marine Sciences&TechnologyUniversity of RuhunaMatara81000Sri Lanka

Time series measurements (2010–2017) from the Research Moored Array for African–Asian–Australian Monsoon Analysis and Prediction (RAMA) moorings at 15°N,90°E and 12°N,90°E are used to investigate the effect of the seasonal barrier layer (BL) on the mixed-layer heat budget in the Bay of Bengal (BoB).The mixed-layer temperature tendency (?T/?t) is primarily controlled by the net surface heat flux that remains in the mixed layer(Q’) from March to October,while both Q’and the vertical heat flux at the base of the mixed layer (Q_(h)),estimated as the residual of the mixed-layer heat budget,dominate during winter (November–February).An inverse relation is observed between the BL thickness and the mixed-layer temperature (MLT).Based on the estimations at the moorings,it is suggested that when the BL thickness is≥25 m,it exerts a considerable influence on ?T/?t through the modulation of Q_(h) (warming) in the *** cooling associated with Q_(h) is strongest when the BL thickness is≤10 m with the MLT exceeding 29°C,while the contribution from Q_(h) remains nearly zero when the BL thickness varies between 10 m and 25 *** inversion is evident in the BoB during winter when the BL thickness remains≥25 m with an average MLT0.72 at the 95%significance level.

关键词： barrier layer vertical heat flux temperature inversion Bay of Bengal

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孟加拉湾春季小型暖池对热带气旋的影响研究

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南京信息工程大学学报（自然科学版） 2020年第4期12卷 460-471页

作者： gayan Pathirana Kanchana Priyadarshani 王东晓陈更新 Tilak priyadarshana 中国科学院南海海洋研究所热带海洋环境国家重点实验室广州510301 卢胡纳大学渔业与海洋科学技术学院马塔拉81000斯里兰卡

本文研究了2017年春季孟加拉湾小型暖池对热带气旋Maarutha(4月14-17日)以及热带气旋Mora(5月27-30日)的影响.利用卫星遥感和现场观测数据分析发现,尽管春季孟加拉湾热带气旋确实能引起海洋上层冷却效应,但是其冷却强度受到暖池强度的影... 详细信息

本文研究了2017年春季孟加拉湾小型暖池对热带气旋Maarutha(4月14-17日)以及热带气旋Mora(5月27-30日)的影响.利用卫星遥感和现场观测数据分析发现,尽管春季孟加拉湾热带气旋确实能引起海洋上层冷却效应,但是其冷却强度受到暖池强度的影响.本文进一步对比孟加拉湾小型暖池对两个热带气旋的响应情况,发现当春季小型暖池的温度大于31℃(热带气旋Mora期间),暖池效应能有效抑制海洋上层混合层的加深,降低热带气旋引起的潜热通量损失带来的冷却效应,并在一定程度上加强了热带气旋.

关键词：热带气旋春季小型暖池海表温度孟加拉湾

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