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LDH-based nanomaterials for photocatalytic applications:A comprehensive review on the role of bi/trivalent cations, anions,morphology, defect engineering, memory effect, and heterojunction formation

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Journal of Energy Chemistry 2023年第9期84卷 242-276页

作者： azmat ali khan Muhammad Tahir Nazish khan Baluchistan University of Information Technology Engineering and Management Sciences(BUITEMS)P.O.Box 87100QuettaPakistan Chemical and Petroleum Engineering Department UAE UniversityP.O.Box 15551Al AinUnited Arab Emirates The University of Agriculture Swat P.O.Box 19040Pakistan

Using sunlight to drive chemical reactions via photocatalysis is paramount for a sustainable *** several photocatalysts,employing layered double hydrides(LDH) for photocatalytic application is most straightforward and desirable owing to their distinctive two-dimensional(2D) lamellar structure and optical *** article reviews the advancements in bimetallic/trimetallic LDHs and various strategies to achieve high efficiency toward an outstanding performing ***,the tuning of LDH components that control the electro nic and structural properties is *** tu ning obtained through the adoption,combination,and incorporation of different cations and anions is also *** progress of modification methods,such as the adoption of different morphologies,delamination,and defect engineering towards enhanced photocatalytic activities,is discussed in the *** band engineering,structural characteristics,and redox tuning are further deliberated to maximize solar energy harvesting for different photocatalytic ***,the progress obtained in forming hierarchical heterostructures through hybridization with other semiconductors or conducting materials is systematically disclosed to get maximum photocatalytic ***,the structural changes during the in-situ synthesis of LDH and the stability of LDH-based photocatalysts are *** review also summarizes the improvements in LDH properties obtained through modification tactics and discusses the prospects for future energy and environmental applications.

关键词： LDH Properties Potential photocatalyst Photocatalytic application Photocatalytic properties Improvement strategies

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Exploring the nano-fungicidal efficacy of green synthesized magnesium oxide nanoparticles(MgO NPs)on the development,physiology,and infection of carrot(Daucus carota L.)with Alternaria leaf blight(ALB):Molecular docking

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Journal of Integrative Agriculture 2023年第10期22卷 3069-3080页

作者： Lukman AHAMAD azmat ali khan Masudulla khan Orudzhev FARID Mahboob ALAM Plant Pathology/Nematology Laboratory Department of BotanyAligarh Muslim UniversityAligarh 202002India Regional Plant Quarantine Station Salt LakeKolkata 700097India Pharmaceutical Biotechnology Laboratory Department of Pharmaceutical ChemistryCollege of PharmacyKing Saud UniversityRiyadh 11451Saudi Arabia Botany Section Women’s CollegeAligarh Muslim UniversityAligarh 202002India Amirkhanov Institute of Physics Dagestan Federal Scientific CenterRussian Academy of SciencesMakhachkala 367003Russia Department of Safety Engineering Dongguk UniversityGyeongju-si 780714Republic of Korea

In this research,green synthesized magnesium oxide nanoparticles(MgO NPs)from lemon fruit extracts and their fungicidal potential was evaluated against Alternaria dauci infection on carrot(Daucus carota L.)under greenhouse *** scanning and transmission electron microscopy(SEM and TEM)and ultra-violet(UV)visible spectroscopy were used to validate and characterize MgO *** crystalline nature of MgONPs was determined using selected area electron diffraction(SAED).MgO NPs triggered substantial antifungal activity against *** when exposed to 50 and 100 mg L^(–1)concentrations but the higher antifungal potential was noticed in 100 mg L^(–1)under invitro *** fungal inoculated plants,a marked decrease in growth,photosynthetic pigments,and an increase in phenol,proline contents,and defense-related enzymes of carrot were seen over control(distilled water).However,foliar application of MgO NPs at 50 and 100 mg L^(–1)resulted in significant improvement of plant growth,photosynthetic pigments,phenol and proline contents,and defense enzymes activity of carrots with and without *** *** of MgO NPs at 100 mg L^(–1)had more plant length(17.11%),shoot dry weight(34.38%),plant fresh weight(20.46%),and root dry weight(49.09%)in carrots when challenged with *** over inoculated *** leaf blight indices and percent disease severity were also reduced in *** inoculated plants when sprayed with MgO *** non-bonding interactions of Alternaria genus protein with nanoparticles were studied using molecular docking.

关键词： green synthesis MgO nanoparticles alternaria leaf blight photosynthetic pigments defense enzymes carrot

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Recent advances in titanium carbide MXene-based nanotextures with influential effect of synthesis parameters for solar CO_(2)reduction and H_(2)production:A critical review

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Journal of Energy Chemistry 2023年第1期76卷 295-331,I0008页

作者： Muhammad Tahir azmat ali khan Sehar Tasleem Rehan Mansoor Areen Sherryna Beenish Tahir Chemical and Petroleum Engineering Department UAE UniversityP.0.Box 15551Al AinUnited Arab Emirates Balochistan University of Information Technology Engineering and Management Sciences(BUITEMS)QuttaBalochistanPakistan Department of Chemical Engineering School of Chemical and Energy EngineeringUniversiti Teknologi Malaysia81310UTM.Johor BahruJohorMalaysia Civil and Environmental Engineering Department UAE UniversityP.o.Box 15551Al AinUnited Arab Emirates

Photocatalytic solar to energy conversion is considered an attractive approach for overcoming energy crises and environmental ***,titanium carbide(Ti_(3)C_(2))MXenes have been recognized as promising cocatalysts based on their metallic conductivity,excessive active reaction sites,and enlarged surface *** current review focuses on the properties and applications of Ti_(3)C_(2)MXenes useful in the field of *** specifically,surface modification of Ti_(3)C_(2)MXenes by varying synthesis parameters to get pure materials and also composites with the role of functional groups towards solar energy conversion applications is highlighted in this *** effect of etching and oxidizing pathways to get an efficient cocatalyst has been discussed in *** the significant effect of parameters,optimum synthesis conditions such as etchant type,concentration,time and type of intercalant in both the Ti_(3)C_(2)synthesis approaches for improved photoactivity are ***,the surface modification of Ti_(3)C_(2)through oxidation for TiO2growth on its surface is deliberated with a detailed discussion on etchant type,concentration,etching time,and environmental *** optimum oxidation condition,including temperature,time,and environment for thermal treatment of Ti_(3)C_(2),were also ***,the review summarizes the conclusion and future perspectives for solar energy conversion applications.

关键词： Solar to energy conversion Ti_(3)C_(2)nanomaterials Termination groups MXene cocatalyst Synthesis parameters

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Comprehensive screening and selection of okra (Abelmoschus esculentus) germplasm for salinity tolerance at the seedling stage and during plant ontogeny

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2012年第7期13卷 533-544页

作者： Ikram-ul-HAQ Asif ali khan Iqrar Ahmad khan Muhammad Abubakkar azmat Department of Plant Breeding and Genetics University of AgricultureFaisalabadPakistan Institute of Horticultural Sciences University of AgricultureFaisalabadPakistan

The okra germplasm was screened for salinity tolerance at the seedling stage and during plant ontogeny. Substantial variation existed in okra for salinity tolerance at the seedling stage. An 80 mmol/L NaCI concentration was suitable for discriminating tolerant and non-tolerant okra genotypes. The pooled ranking of the genotypes, based on individual rankings for each trait （root and shoot length, germination percentage, and relative Na^＋ and K%＋） in individual NaCI concentrations, was effective for selecting tolerant genotypes. Genotypes selected at the seedling stage maintained their tolerance to NaCI during plant ontogeny, suggesting that screening of the germplasm entries and advanced breeding materials for salt tolerance at the seedling stage is effective. Among 39 okra genotypes, five were identified as the most tolerant genotypes and showed potential for use in breeding programs that focus on the development of salt-tolerant, high-yield okra cultivars.

关键词： Salinity tolerance Okra Growth stage Genetic variation Mechanism Potassium to sodium ion ratio (K^+/Na^+)

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Extraction of DNA suitable for PCR applications from mature leaves of Mangifera indica L.

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2012年第4期13卷 239-243页

作者： Muhammad Abubakkar azmat Iqrar Ahmad khan Hafiza Masooma Naseer CHEEMA Ishtiaq Ahmad RAJWANA Ahmad Sattar khan Asif ali khan Centre of Agricultural Biochemistry and Biotechnology University of AgricultureFaisalabadPakistan Department of Plant Breeding and Genetics University of Agricul-tureFaisalabadPakistan University College of Agriculture Bahauddin Zakariya UniversityMultanPakistan Institute of Horticultural Sciences University of AgricultureFais-alabadPakistan

Good quality deoxyribonucleic acid （DNA） is the pre-requisite for its downstream applications. The presence of high concentrations of polysaccharides, polyphenols, proteins, and other secondary metabolites in mango leaves poses problem in getting good quality DNA fit for polymerase chain reaction （PCR） applications. The problem is exacerbated when DNA is extracted from mature mango leaves. A reliable and modified protocol based on the cetyl trimethylammonium bromide （CTAB） method for DNA extraction from mature mango leaves is described here. High concentrations of inert salt were used to remove polysaccharides; Polyvinylpyrrolidone （PVP） and 13-mercaptoethanol were employed to man＇age phenolic compounds. Extended chloroform-isoamyl alcohol treatment followed by RNase treatment yielded 950-1050 pg of good quality DNA, free of protein and RNA. The problems of DNA degradation,contamination, and low yield due to irreversible binding of phenolic compounds and coprecipitation of polysaccharides with DNA were avoided by this method, The DNA isolated by the modified method showed good PCR amplification using simple sequence repeat （SSR） primers, This modified protocol can also be used to extract DNA from other woody plants having similar problems.

关键词： Extraction buffer Mango Polyphenols DNA isolation Simple sequence repeat (SSR) Secondary metabotites

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Exploring ferromagnetic half-metallic nature of Cs2NpBr6 via spin polarized density functional theory

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Chinese Physics B 2020年第6期29卷 364-368页

作者： Malak azmat ali G Murtaza A Laref Department of Physics Government Post Graduate Jahanzeb College Saidu SharifSwat 19130Khyber PakhtunkhwaPakistan Materials Modeling Laboratory Department of PhysicsIslamia College Peshawar 25120Khyber PakhtunkhwaPakistan Department of Physics and Astronomy College of SciencesKing Saud UniversityRiyadh11451 Kingdom of Saudi Arabia

By employing the spin resolved density functional theory, half-metallic character is investigated in Cs2NpBr6 having a K2PtCl6-type structure. The results precisely predict the half-metallic behavior of Cs2NpBr6. In spin-down state it presents an indirect band gap, while in spin-up channel it turns metallic. The structure optimization confirms the half-metallic nature in ferromagnetic configuration. The calculated magnetic moment is 3 μB toward which the main contributor is the Np ***, all the computed results are compared with the available experimental and theoretical values. According to the present analysis, we recommend Cs2NpBr6 for spintronic applications.

关键词： half-metallic ferromagnetic magnetic moment spintronics

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