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Substituent engineering in g-C_(3)N_(4)/COF heterojunctions for rapid charge separation and high photo-redox activity

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Science China Chemistry 2022年第9期65卷 1704-1709页

作者： Jiayun Guo Dongge ma Fulin Sun Guilin Zhuang Qi Wang abdullah m.al-enizi Ayman Nafady Shengqian ma School of Environmental Science and Engineering Zhejiang Gongshang UniversityHangzhou 310018China Department of Chemistry College of Chemistry and Materials EngineeringBeijing Technology and Business UniversityBeijing 100048China Institute of Industrial Catalysis College of Chemical EngineeringZhejiang University of TechnologyHangzhou 310023China Department of Chemistry College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia Department of Chemistry University of North TexasDentonTX 76201USA

The heterojunction composed of covalent organic frameworks(COFs)with adjustable structure and other photocatalysts has great potential in the field of ***,effectively enhancing the photocatalytic performance of organic heterojunctions by designing the structure of COFs has not been ***,TPB-TP-COFs fabricated from 1,3,5-tris(4-amino-phenyl)benzene(TPB)and terephthalaldehyde(TP)with different substituents(−H,−OH,−OCH_(3),−Br and−F groups),were applied to construct g-C_(3)N_(4)/*** performance improvement of the heterojunction could be affected by substituents,and only−OCH_(3) groups can significantly improve both the photocatalytic phenol oxidation and Cr(Ⅵ)*** calculation demonstrated that the substituents will affect the electron cloud distribution of CBm,and the location of CBm in the TPB segment is beneficial for the charge transport between TPB-TP-OCH_(3) and g-C_(3)N_(4).The enhanced charge transfer from g-C_(3)N_(4) to TPB segment and the improved light absorption of TPB-TP-OCH_(3) jointly optimize the photocatalytic redox capacity of g-C_(3)N_(4)/TPB-TP-OCH_(3).On the basis of this study,regulating the electronic effects of semiconductors played a vital role in improving photocatalytic performance in organic heterojunctions.

关键词： monofluorophosphate g-C_(3)N_(4) heterojunction photocatalysis substituent electronegativity

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Effect of rGO support on Gd@ZnO for UV-visible-light driven photocatalytic organic pollutant degradation

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Journal of Rare Earths 2023年第10期41卷 1525-1531,I0002页

作者： Baskaran Palanivel md Shahadat Hossain Romulo R.macadangdang Jr. S.Sahaya Jude Dhas abdullah m.al-enizi mohd Ubaidullah Woo Kyoung Kim Sreedevi Gedi S.Ignatius Arockiam Department of Physics Kings Engineering CollegeSriperumbudurKancheepuram602117Tamil NaduIndia Department of Innovation Systems Engineering Graduate School of EngineeringUtsunomiya UniversityYoto 7-1-2Utsunomiya 321-8585Japan College of allied Health National UniversityManila1008Philippines Department of Chemistry College of ScienceKing Saud UniversityRiyadh11451Saudi Arabia School of Chemical Engineering Yeungnam UniversityGyeongsan38541Republic of Korea PG and Research Department of Chemistry GTN Arts CollegeDindigul624005Tamil NaduIndia

In this manuscript,we report the hydrothermally prepared rGO/Gd@ZnO nanocomposite for the utilization of photocatalytic Rh B(rhodamine B)dye *** required characterization techniques were carried out to analyse the structural,morphological,chemical,environmental and optical behaviour of the prepared *** efficiency of the prepared nanoparticles was studied by Rh B dye degradation upon UV-Vis-light illumination which reveals that composite catalyst degrades the dye molecule about 91%after 40 min of *** comparing the higher degradation efficiency of the rGO/Gd@ZnO nanocomposite with that of ZnO and Gd doped ZnO,it reveals a greater reduction of charge carriers'recombination,higher visible-light utilization and higher adsorption *** trapping experiment and recycling test were conducted to study the influence of active radicals for the degradation reaction and to know the stability of the prepared nanocomposite,***,this rGO supported Gd doped ZnO nanocomposite can provide a new path way in preparing a highly efficient photocatalyst for organic pollutant degradation at large.

关键词： rGO Gd doped ZnO UV-Vis photocatalyst Dye degradation Rare earths

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Scalable and low-cost fabrication of flexible WS_(2) photodetectors on polycarbonate

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npj Flexible Electronics 2022年第1期6卷 226-234页

作者： Jorge Quereda Sruthi Kuriakose Carmen munuera Federico J.mompean abdullah m.al-enizi Ayman Nafady Enrique Diez Riccardo Frisenda Andres Castellanos-Gomez GISC Departamento de Física de MaterialesUniversidad Complutense de MadridMadridSpain materials Science Factory Instituto de Ciencia de Materiales de Madrid(ICMMCSIC)28049 MadridSpain Department of Chemistry College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia Nanotechnology Group USAL–NanolabUniversidad de Salamanca37008 SalamancaSpain

We present a low-cost and easy-to-implement technique to fabricate large-area WS_(2) photodetector devices onto transparent and flexible polycarbonate *** method relies on the deposition of large-area(in the cm scale)thin films(~30 nm thick)of WS_(2) by a recently introduced abrasion-induced *** electrical contacts are then deposited by thermal evaporation through a shadow *** photodetectors present well-balanced performances with an good trade-off between responsivity(up to 144 mA/W at a source-drain voltage of 10 V and illumination power of 1μW)and response time(down to~70µs)and a detectivity value of 10^(8) *** found that the devices perform very reversibly upon several illumination and straining cycles and we found a moderate device-to-device variation.

关键词： drain illumination cost

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Utilization of cationic microporous metal-organic framework for efficient Xe/Kr separation

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Nano Research 2022年第8期15卷 7559-7564页

作者： Lingshan Gong Ying Liu Junyu Ren abdullah mal-enizi Ayman Nafady Yingxiang Ye Zongbi Bao Shengqian ma Department of Chemistry University of North TexasDentonTexas 76201USA Key Laboratory of Biomass Chemical Engineering of ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China Department of Chemistry College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia

The separation of xenon/krypton(Xe/Kr)mixtures plays a vital role in the industrial process of manufacturing high-purity *** with energy-intensive cryogenic distillation,porous materials based on physical adsorption are very promising in the low-cost and energy-saving separation ***,we show that a cationic metal-organic framework(named as FJU-55)exhibits highly efficient Xe/Kr separation performance,which can be attributable to its uniform three-dimensional(3D)interconnection channels and the electro-positive features as the host ***,FJU-55 demonstrates good Xe adsorption capacity of 1.41 mmol/g and excellent Xe/Kr selectivity of 10(298 K and 100 kPa),together with a high Qst value of 39.4 kJ/mol at low coverage *** superior Xe/Kr separation performance of FJU-55 was further confirmed by the dynamic breakthrough *** obtained via molecular modeling studies have revealed that the suitable pore size and abundant accessible aromatic ligands in FJU-55 could offer strong multiple C–H∙∙∙Xe interactions,which play a collaborative role in this challenging gas separation task.

关键词： gas separation cationic metal-organic framework microporous xenon capture krypton

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One-pot hydrothermal preparation of hierarchical manganese oxide nanorods for high-performance symmetric supercapacitors

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Journal of Energy Chemistry 2022年第2期31卷 116-126页

作者： Bidhan Pandit Emad S.Goda mahmoud H.Abu Elella Aafaq ur Rehman Sang Eun Hong Sachin R.Rondiya Pranay Barkataki Shoyebmohamad F.Shaikh abdullah m.al-enizi Salah mEl-Bahy Kuk Ro Yoon Department of materials Science and Engineering and Chemical Engineering Universidad Carlos III de MadridAvenida de la Universidad 3028911 LeganésMadridSpain Organic Nanomaterials Lab Department of ChemistryHannam UniversityDaejeon 34054Republic of Korea Fire Protection Laboratory National Institute of Standards136Giza 12211Egypt Chemistry Department Faculty of ScienceCairo UniversityGiza 12613Egypt Graduate School of Energy Science and Technology Chungnam National University99 Daehak-roYuseong-guDaejeon 34134Republic of Korea School of Chemistry Cardiff UniversityMain BuildingPark PlaceCardiffCF103AT WalesUnited Kingdom Department of Physics Visvesvaraya National Institute of TechnologySouth Ambazari RoadNagpur-440010MaharashtraIndia Department of Chemistry College of ScienceKing Saud UniversityP.O.Box 2455Riyadh 11451Saudi Arabia Department of Chemistry Turabah University CollegeTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia

An eco-friendly,new,and controllable approach for the preparation of manganese oxide(a-mnO_(2))nanorods has been introduced using hydrothermal reaction for supercapacitor *** in-depth crystal structure analysis ofα-mnO_(2) is analyzed by X-ray Rietveld refinement by using Full Prof program with the help of pseudo-Voigt profile *** developed a-mnO_(2) electrode attains a remarkable capacitance of 577.7 F/g recorded at a current density value of 1 A/g with an excellent cycle life when is used for 10,000 repeated cycles due to the porous nanorod-morphology assisting the ease penetration of electrolyte ions into the electroactive *** diffusive and capacitive contributions of the electrode have been estimated by considering standard numerical packages in *** successfully assembling the aqueous symmetric supercapacitor(SSC)cell by utilizing the as-preparedα-mnO_(2),an excellent capacitance of 163.5 F/g and energy density of 58.1 Wh/kg at the constant current density of 0.5 A/g are obtained with an expanded potential frame of 1.6 ***,the cell has exceptionally withstood up to 10,000 cycles with an ultimate capacitance retention of 94.1%including the ability to light an LED for 18 *** findings recommend the developed a-mnO_(2) electrode to be a highly felicitous electrode for the field of energy storage.

关键词： α-mnO_(2)nanorods Rietveld refinement Symmetrical supercapacitors High energy density

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In Situ Formation of Frustrated Lewis Pairs in a Zirconium metal-Organic Cage for Sustainable CO_(2)Chemical Fixation

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CCS Chemistry 2023年第9期5卷 1989-1998页

作者： Cheng-Xia Chen Hassan Rabaâ Haiping Wang Pui Ching Lan Yang-Yang Xiong Zhang-Wen Wei abdullah m.al-enizi Ayman Nafady Shengqian ma Department of Chemistry University of North TexasDentonTexas 76201 mOE Laboratory of Bioinorganic and Synthetic Chemistry Lehn Institute of Functional MaterialsSchool of ChemistrySun Yat-sen UniversityGuangzhou 510275 Department of Chemistry Ibn Tofail UniversityESCTM14000 Kenitra Department of Chemistry College of ScienceKing Saud UniversityRiyadh 11451

Sustainable CO_(2)fixation represents a facile and promising approach to constructing various valueadded ***,we contribute a robust metal-organic cage(mOC),denoted as TCPB-1,comprising a bulky Lewis acid functionalized linker,which can in situ form frustrated Lewis pairs(FLPs)upon the addition of Lewis basic substrates to efficiently drive CO_(2)***,the incorporation of Lewis acidic boron sites within TCPB-1 promotes the efficient CO_(2)conversion to potentially medicinal benzimidazole derivatives via an FLPmediated pathway,and boosts the stability/durability of the FLP *** addition,the underlying catalysis mechanism has been established by combined experimental and molecular simulation *** work not only advances FLP/mOC as a new type of highly efficient catalyst for CO_(2)chemical fixation,but also opens a new avenue to design heterogeneous FLP-based catalysts for small molecule activation and beyond.

关键词： metal-organic cage frustrated Lewis pair heterogeneous catalysis CO_(2)conversion sustainable chemistry

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Low-Cost and Biodegradable Thermoelectric Devices Based on van der Waals Semiconductors on Paper Substrates

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Energy & Environmental materials 2024年第1期7卷 201-206页

作者： Gulsum Ersu Carmen munuera Federico J.mompean Daniel Vaquero Jorge Quereda João Elias F.S.Rodrigues Jose A.alonso Eduardo Flores Jose R.Ares Isabel J.Ferrer abdullah m.al-enizi Ayman Nafady Sruthi Kuriakose Joshua O.Island Andres Castellanos-Gomez materials Science Factory Instituto de Ciencia de Materiales de Madrid(ICMM-CSIC)Madrid E-28049Spain Nanotechnology Group USAL-NanolabUnivesidad de SalamancaSalamanca Junta de Castilla y León 37007Spain GISC Departamento de Física de MaterialesUniversidad Complutense de MadridMadrid E-28040Spain Departamento de Física Aplicada Centro de Investigación y Estudios AvanzadosMérida 97310Mexico mIRE Group Departamento de Física de MaterialesUniversidad Autónoma de MadridMadrid E-28049Spain Instituto Nicolás Cabrera Universidad Autónoma de MadridMadrid E-28049Spain Department of Chemistry College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia Department of Physics and Astronomy University of Nevada Las VegasLas Vegas NV 89154USA

We present a method to fabricate handcrafted thermoelectric devices on standard office paper *** devices are based on thin films of WS_(2),Te,and BP(P-type semiconductors)and TiS_(3)and TiS_(2)(N-type semiconductors),deposited by simply rubbing powder of these materials against *** thermoelectric properties of these semiconducting films revealed maximum Seebeck coefficients of(+1.32±0.27)mV K^(-1)and(-0.82±0.15)mV K^(-1)for WS_(2)and TiS_(3),***,Peltier elements were fabricated by interconnecting the P-and N-type films with graphite electrodes.A thermopower value up to 6.11 mV K^(-1)was obtained when the Peltier element were constructed with three *** findings of this work show proof-of-concept devices to illustrate the potential application of semiconducting van der Waals materials in future thermoelectric power generation as well as temperature sensing for low-cost disposable electronic devices.

关键词： paper-based electronics Seebeck effect semiconductors thermoelectrics van der Waals materials

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Combining Ability and Heterotic Effects in Newly Developed Early maturing and High-Yielding maize Hybrids under Low and Recommended Nitrogen Conditions

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Phyton-International Journal of Experimental Botany 2025年第1期94卷 101-122页

作者： mohamed m.Kamara Nora m.al Aboud Hameed alsamadany Abeer m.Kutby Imen Ben Abdelmalek Diaa Abd El-moneim motrih al-mutiry Department of Agronomy Faculty of AgricultureKafrelsheikh UniversityKafr El-Sheikh33516Egypt Department of Biology Faculty of ScienceUmm Al-Qura UniversityMakkah24372Saudi Arabia Department of Biological Sciences Faculty of ScienceKing Abdulaziz UniversityJeddah21589Saudi Arabia Department of Biological Science College of ScienceUniversity of JeddahJeddah21589Saudi Arabia Department of Biology College of ScienceBuraydah51452Saudi Arabia Department of Plant Production Genetic BranchFaculty of Environmental and Agricultural SciencesArish UniversityEl-Arish45511Egypt Department of Geography and Environmental Sustainability College of Humanities and Social SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia

Nitrogen (N) is a crucial nutrient vital for the growth and productivity of maize. However, excessive nitrogen application can result in numerous environmental and ecological problems, such as water pollution, biodiversity loss, and greenhouse gas emissions. Therefore, breeding maize hybrids resilient to low nitrogen conditions is crucial for sustainable agriculture, especially under low nitrogen conditions. Consequently, this study aimed to evaluate the combining ability and heterosis of maize lines, recognize promising hybrids, and study gene action controlling key traits under low and recommended N stress conditions. The half-diallel mating design hybridized seven maize inbreds, resulting in 21 F1 hybrids. These hybrids, along with two high-yielding commercial hybrids (SC10 and TWC310), were evaluated in field trials under recommended (290 kg/ha) and low N (166 kg N/ha) conditions. Significant variations were observed among assessed hybrids for all measured traits, with non-additive gene action being predominant for grain yield and its related characteristics under recommended and low N conditions. Inbred lines P105 and P106 were recognized as effective combiners for earliness, with P105 also excelling in shorter plant height and lower ear placement. In addition, P101, P102, and P104 were identified as good combiners for increasing grain yield and related attributes under low N conditions. The crosses P105 × P106 and P106 × P107 demonstrated outstanding heterotic effects for earliness, while hybrids P101 × P102 and P102 × P104 exhibited remarkable heterotic effects for grain yield low nitrogen stress conditions. These promising hybrids could be considered for commercial use after further evaluation. Strong positive correlations were found between grain yield and ear height, plant height, number of kernels per row, and 1000-grain weight, highlighting their importance for indirect selection to enhance the grain yield of maize under low N stress conditions.

关键词： Nitrogen deficiency maize improvement sustainable agriculture hybrid evaluation

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Nano-Enhanced Dairy Scum Biodiesel Blends:Unleashing the Power of aluminium Oxide for Sustainable and Efficient Engine Performance

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Journal of Thermal Science 2025年第1期34卷 283-302页

作者： Veeranna mODI Prasad B.RAmPURE Sunil Kumar SHETTY madeva NAGARal Channa Keshava NAIK N Johar mGm muhammad Irsyad abdullah abdullah I.al-mANSOUR Shamshad alAm KLE College of Engineering and Technology ChikodiVisvesvaraya Technological UniversityBelagavi 590018KarnatakaIndia Nitte(Deemed to be University) NMAM Institute of Technology(NMAMIT)Department of Mechanical EngineeringNitte 574110India Aircraft Research and Design Centre HALBangalore 560037KarnatakaIndia Department of mechanical Engineering BGS College of Engineering and TechnologyBengaluruAffiliated to Visvesvaraya Technological UniversityBelagaviIndia management and Science University Selangor Darul EhsanMalaysia Department of Civil Engineering College of EngineeringKing Saud UniversityRiyadh-11421Saudi Arabia

This study investigates the effect of aluminium oxide nanoparticlesaddition to biodiesel blends made from dairy milk scum on performance and combustion characteristics of the diesel *** dispersion of al_(2)O_(3)nanoparticles in B20 blends at different concentrations was done with the help of *** number of blends were prepared for the *** machine learning algorithms(Random Forest(RF)and CatBoost)was used for the *** results show that in comparison to biodiesel blends without nanoparticles,the kinematic viscosity and density is higher for fuel blends with *** these Fuel blends have higher calorific *** blends exhibited reduced Brake Specific Fuel Consumption(BSFC)of 2.85% than the blends without nano particles(Dairy Scum methyl Ester Biodiesel 20%+Neat Diesel 80%(in volume),DSmEB20),57.14%less CO,40.8% less hydrocarbon,and increased NO_(x)emissions compared to conventional diesel,contributing to the development of environmentally friendly and renewable biofuel blends with *** B20NP30 is the optimal blend for performance and emission *** study concludes with findings on enhanced Brake Thermal Efficiency(BTE)of 26.29% in 3×10^(-5)(in volume)al_(2)O_(3)nanoparticle-blended DSmE B20 and other DSmE B20 fuel blends,emphasizing the importance of optimal nanoparticle *** correlation matrix shows how engine load,efficiency measures(BTE,BSFC),and emissions(CO,CO_(2),NO_(x),Smoke)are connected in complex *** results help us understand the complicated dynamics of engine performance and emission characteristics ***'s diagram for BTE and BSFC shows that CatBoost-based BTE models perform superior to RF-based models during the training as well as testing *** results were obtained for CO and CO_(2)emission results.

关键词： Dairy Scum methyl Ester Biodiesel CI engine al_(2)O_(3)concentration

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Atomically precise m-N-C electrocatalysts for oxygen reduction:Effects of inter-site distance,metal-metal interaction,coordination environment,and spin states

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Journal of Energy Chemistry 2025年第2期101卷 132-155页

作者： Junfeng Huang Saira Ajmal Anuj Kumar Jianwen Guo mohammed mujahid alam abdullah G.al-Sehemi Ghulam Yasin School of mechanical Engineering Dongguan University of Technology Nano-Technology Research Laboratory Department of Chemistry GLA University Department of Chemistry College of Science King Khalid University School of Environmental Science and Engineering Tianjin University State Key Laboratory of Chemical Resource Engineering College of Materials Science and Engineering Beijing University of Chemical Technology

Inspired by molecular catalysts,researchers developed atomically precise nitrogen-coordinated single or dual metal sites imbedded in graphitized carbon（m-N-C） to fully utilize metallic sites for *** catalysts performed remarkably well in the electrocatalytic oxygen reduction reaction（ORR） due to their distinct coordination and electrical structures,Nonetheless,their maximum efficacy in practical applications has yet to be *** agenda identifies tailoring the coordination environment,spin states,intersite distance,and metal-metal interaction as innovative approaches to regulate the ORR performance of these ***,it is necessary to undertake a precise assessment of these methodologies and the knowledge obtained to be implemented in the design of future m-N-C catalysts for ***,this review aims to analyze recent progress in m-N-C ORR catalysts,emphasizing their innovative engineering with aspects such as alteration in intersite distance,metal-metal interaction,coordination environment,and spin ***,we critically discuss how to logically monitor the atomic structure,local coordination,spin,and electronic states of m-N-C catalysts to modulate their ORR *** have also highlighted the challenges associated with m-N-C catalysts and proposed suggestions for their future design and fabrication.

关键词： Activity descriptors Electrocatalysis m-N-C electrocatalysts ORR Spin states

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