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Wafer-scale quasi-layered tungstate-doped polypyrrole film with high volumetric capacitance

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Nano Research 2023年第4期16卷 4895-4900页

作者： Huabo Liu Jiaxing Liang John Watt Richard D.Tilley rose amal Da-Wei Wang School of Chemical Engineering University of New South WalesSydneyNSW 2052Australia 2 Center for Integrated NanotechnologiesLos Alamos National LaboratoryLos AlamosNW 87545USA 3 School of ChemistryUniversity of New South WalesSydneyNSW 2052Australia

Layered materials are particularly attractive for supercapacitors because of their unique physical,electrical and chemical ***,we demonstrate a facile and scalable electrochemical deposition method for wafer-scale synthesis of quasilayered tungstate-doped polypyrrole films(named TALPy)with controllable thickness and *** as-prepared TALPy film exhibits a high gravimetric density and excellent volumetric capacitance,exceeding many high-performing carbon-and polymerbased film *** on combined results of ex-situ X-ray diffraction(XRD),Raman and X-ray photoelectron spectroscopy(XPS),it is determined that TALPy stores charge through an ion intercalation process accompanied by change in oxidation states of polypyrrole backbone,which is referred as intercalation *** these results suggest the great promise of electrochemical deposition as a scalable and controllable bottom-up approach for synthesizing quasi-layered conductive organic-inorganic hybrid films for electrochemical energy storage applications with high volumetric performance.

关键词： electrochemical deposition conductive polymer polypyrrole organic-inorganic hybrid supercapacitor intercalation pseudocapacitance

Promising hollow multi-shelled structures:discovering the temporal-spatial ordering

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National Science Review 2020年第11期7卷 1763-1764页

作者： rose amal School of Chemical Engineering University of New South Wales

Harvesting incident photons is the first step in a photo-induced process such as photocatalysis, photovoltaics or photodetection, which crucially governs the process performance. Unfortunately,extensive energy losses are observed in this step due to severe surface reflections and limited optical paths of the shortwavelength light [1]. Thus,

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An integrated nanocarbon–cellulose membrane for solid-state supercapacitors

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Science Bulletin 2016年第5期61卷 368-377页

作者： Huabo Liu Yuheng Tian rose amal Da-Wei Wang School of Chemical Engineering The University of New South Wales

In this work, we demonstrate the assembly of oxidised carbon nanohybrids(o CNHs) with a commercial cellulose membrane for solid-state supercapacitors. The o CNHs–cellulose membranes were prepared by filtering a water dispersion of o CNHs through the cellulose membrane. The o CNHs were derived from carbon nanotubes via a modified Hummer's method and contained both closed tubes and unzipped tubes, which indicated a hybrid geometrical structure. The solid-state supercapacitor based on the o CNHs–cellulose membranes showed a high areal capacitance of *75 m F/cm^2 at a low scan rate(5 m V/s)and excellent stability for 1,000 cycles.

关键词：超级电容器纤维素膜纳米碳固态集成碳复合材料碳纳米管几何结构

Efficient CO_(2)Reduction to Formate on CsPbI_(3) Nanocrystals Wrapped with Reduced Graphene Oxide

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Nano-Micro Letters 2023年第10期15卷 1-14页

作者： Minh Tam Hoang Chen Han Zhipeng Ma Xin Mao Yang Yang Sepideh Sadat Madani Paul Shaw Yongchao Yang Lingyi Peng Cui Ying Toe Jian Pan rose amal Aijun Du Tuquabo Tesfamichael Zhaojun Han Hongxia Wang School of Chemistry and Physics Faculty of ScienceQueensland University of TechnologyBrisbaneQLD 4001Australia Centre for Materials Science Queensland University of TechnologyBrisbaneQLD 4001Australia School of Chemical Engineering The University of New South WalesKensingtonNSW 2052Australia Centre for Organic Photonics&Electronics(COPE) School of Chemistry and Molecular BiosciencesThe University of QueenslandBrisbaneQLD 4072Australia School of Engineering The University of NewcastleCallaghanNSW 2038Australia

Transformation of greenhouse gas(CO_(2))into valuable chemicals and fuels is a promising route to address the global issues of climate change and the energy *** halide perovskite catalysts have shown their potential in promoting CO_(2)reduction reaction(CO_(2)RR),however,their low phase stability has limited their application ***,we present a reduced graphene oxide(rGO)wrapped CsPbI_3 perovskite nanocrystal(NC)CO_(2)RR catalyst(CsPbI_3/rGO),demonstrating enhanced stability in the aqueous *** CsPbI_3/rGO catalyst exhibited>92%Faradaic efficiency toward formate production at a CO_(2)RR current density of~12.7 mA cm^(-2).Comprehensive characterizations revealed the superior performance of the CsPbI_3/rGO catalyst originated from the synergistic effects between the CsPbI_3 NCs and rGO,i.e.,rGO stabilized theα-CsPbI_3 phase and tuned the charge distribution,thus lowered the energy barrier for the protonation process and the formation of~*HCOO intermediate,which resulted in high CO_(2)RR selectivity toward *** work shows a promising strategy to rationally design robust metal halide perovskites for achieving efficient CO_(2)RR toward valuable fuels.

关键词： Perovskite nanocrystal Electrocatalyst Inorganic perovskite CO_(2)reduction Formate production

Harnessing the Beneficial Attributes of Ceria and Titania in a Mixed-Oxide Support for Nickel-Catalyzed Photothermal CO_2 Methanation

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Engineering 2017年第3期3卷 393-401页

作者： Ee Teng Kho Salina Jantarang Zhaoke Zheng Jason Scott rose amal Particles and Catalysis Research Laboratory School of Chemical Sciences and Engineering The University of New South Wales Sydney NSW 2052 Australia

太阳能驱动二氧化碳(CO_2)转化为燃料是解决CO_2减排和快速增长的世界能源需求的理想方案。本文利用光照辐射镍基负载催化剂床层引发加热效应以促进CO_2的转化,研究了不同组成的氧化铈-氧化钛复合氧化物载体及其对光热CO_2转化的影响。... 详细信息

太阳能驱动二氧化碳(CO_2)转化为燃料是解决CO_2减排和快速增长的世界能源需求的理想方案。本文利用光照辐射镍基负载催化剂床层引发加热效应以促进CO_2的转化,研究了不同组成的氧化铈-氧化钛复合氧化物载体及其对光热CO_2转化的影响。提高光热CO_2甲烷化活性的两个至关重要的因素分别是:(1)优化的镍颗粒负载对于高活性催化面积及用于加热催化床层的更高的光吸收能力是必需的;(2)载体上的缺陷位对于促进CO_2吸附及随后的活化是必需的。载体中的钛对维持掺杂氧化钛的氧化铈上的氧空位缺陷起着关键作用。当氧化铈和氧化钛混合比例理想时,再结合高光照吸收以及稳定的还原状态,有利于CO_2吸附及随后高效光热CO_2甲烷化反应的发生。

关键词：光热二氧化碳还原镍氧化铈氧化钛

Emerging material engineering strategies for amplifying photothermal heterogeneous CO_(2)catalysis

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Journal of Energy Chemistry 2021年第8期30卷 108-125,I0004页

作者： Bingqiao Xie Emma Lovell Tze Hao Tan Salina Jantarang Mengying Yu Jason Scott rose amal Particles and Catalysis Research Group School of Chemical EngineeringThe University of New South Wales2052 SydneyAustralia Department of Chemistry Faculty of Science Kyushu UniversityMoto-oka744 Nishi-ku819-0395 FukuokaJapan

Closing the carbon loop,through CO_(2)capture and utilization,is a promising route to mitigate climate *** energy is a sustainable energy source which can be exploited to drive catalytic reactions for utilizing CO_(2),including converting the CO_(2)into useful *** energy can be harnessed through a range of different pathways to valorize CO_(2).Whilst using solar energy to drive CO_(2)reduction has vast potential to promote catalytic CO_(2)conversions,the progress is limited due to the lack of understanding of property-performance relations as well as feasible material engineering ***,we outline the various driving forces involved in photothermal CO_(2)*** heat from solar energy can be utilized to induce CO_(2)catalytic reduction reactions via the photothermal ***,solar energy can act to modify reaction pathways through light-matter ***-induced chemical functions have demonstrated the ability to regulate intermediary reaction steps,and thus control the reaction *** catalyst structures and specific catalyst design strategies are discussed in this *** review provides a comprehensive understanding of the heat-light synergy and guidance for rational photothermal catalyst design for CO_(2)utilization.

关键词： CO_(2)reduction Photothermal catalysis Material engineering strategies Plasmonic photocatalysis

Role of support in photothermal carbon dioxide hydrogenation catalysed by Ni/CexTiyO2

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Progress in Natural Science:Materials International 2018年第2期28卷 168-177页

作者： Salina Jantarang Emma C.Lovell Tze Hao Tan Jason Scott rose amal Particles and Catalysis Research Group School of Chemical Sciences and Engineering The University of New South Wales

Nickel was supported on varied ratios of ceria-titania mixed oxides（Ni/CexTiyO2） to evaluate the role the support plays in photothermal carbon dioxide hydrogenation to produce methane. In a batch photothermal reactor system, Ni/CeO2achieved the highest conversion rate, reaching a conversion of 93% in approximately60–90 min. To decouple the influence of light and heat, the CO2hydrogenation was examined in an in-house designed photothermal reactor, whereby heat can be applied externally. Decoupling experiments revealed that heat from the thermalisation by light was the main driving force for the reaction. In addition, the conversion and temperature profile of the different catalysts revealed that the catalyst performance was governed by catalyst reducibility. H2-TPR analyses showed that the Ni became more readily reducible with increasing Ce O2content,suggesting that the oxide plays a role in activating the Ni. The reduction temperature of the nickel catalyst（following a reduction and passivation process） was below 200 °C, which meant that the inherent heating temperature of the photothermal reactor was sufficient to initiate Ni/CexTiyO2catalyst activity. The exothermic methanation reaction was then able to heat the system further, ultimately reaching a temperature of 285 °C. The ancillary rise in temperature promotes further nickel reduction and methane formation, leading to a "snow-ball"effect. The findings demonstrate that, to achieve a "snow-ball" effect in a photothermal system, designing a catalyst which is easy to reduce, active for CO2hydrogenation, and capable of converting light to heat for its initial activation is critical.

关键词： Photothermal CO2 Methanation Ceria Titania Nickel Reducibility

A review on photo-thermal catalytic conversion of carbon dioxide

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Green Energy & Environment 2017年第3期2卷 204-217页

作者： Ee Teng Kho Tze Hao Tan Emma Lovell Roong Jien Wong Jason Scott rose amal Particles and Catalysis Research Group School of Chemical EngineeringThe University of New South Wales

The conversion of carbon dioxide into value-added products is of great industrial and environmental interest. However, as carbon dioxide is relatively stable, the input energy required for this conversion is a significant limiting factor in the system's performance. By utilising energy from the sun, through a range of key routes, this limitation can be overcome. In this review, we present a comprehensive and critical overview of the potential routes to harvest the sun's energy, primarily through solar-thermal technologies and plasmonic resonance effects. Focusing on the localised heating approach, this review shortlists and compares viable catalysts for the photo-thermal catalytic conversion of carbon ***, the pathways and potential products of different carbon dioxide conversion routes are outlined with the reverse water gas shift,methanation, and methanol synthesis being of key interest. Finally, the challenges in implementing such systems and the outlook to the future are detailed.

关键词： Carbon dioxide conversion Photo-thermal Plasmonic catalysis Solar thermal

Chloramine demand estimation using surrogate chemical and microbiological parameters

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Journal of Environmental Sciences 2017年第7期29卷 1-7页

作者： Sina Moradi Sanly Liu Christopher W.K.Chow John van Leeuwen David Cook Mary Drikas rose amal School of Chemical Engineering The University of New South Wales Australian Water Quality Centre SA Water Corporation Centre for Water Management and Reuse School of Natural and Built EnvironmentsUniversity of South Australia

A model is developed to enable estimation of chloramine demand in full scale drinking water supplies based on chemical and microbiological factors that affect chloramine decay rate via nonlinear regression analysis *** model is based on organic character（specific ultraviolet absorbance（SUVA）） of the water samples and a laboratory measure of the microbiological（Fm） decay of *** applicability of the model for estimation of chloramine residual（and hence chloramine demand） was tested on several waters from different water treatment plants in Australia through statistical test analysis between the experimental and predicted *** showed that the model was able to simulate and estimate chloramine demand at various times in real drinking water *** elucidate the loss of chloramine over the wide variation of water quality used in this study,the model incorporates both the fast and slow chloramine decay *** significance of estimated fast and slow decay rate constants as the kinetic parameters of the model for three water sources in Australia was *** was found that with the same water source,the kinetic parameters remain the *** modelling approach has the potential to be used by water treatment operators as a decision support tool in order to manage chloramine disinfection.

关键词： Chloramine demand Drinking water treatment plants Modelling