TY - JOUR AU - Nagyné Kovács, Teodóra AU - Studnicka, L AU - Lukács, István Endre AU - Nagyné László, Krisztina AU - Pasierb, P AU - Szilágyi, Imre Miklós AU - Pokol, György TI - Hydrothermal Synthesis and Gas Sensing of Monoclinic MoO3 Nanosheets JF - NANOMATERIALS J2 - NANOMATERIALS-BASEL VL - 10 PY - 2020 IS - 5 PG - 12 SN - 2079-4991 DO - 10.3390/nano10050891 UR - https://m2.mtmt.hu/api/publication/31333258 ID - 31333258 LA - English DB - MTMT ER - TY - JOUR AU - Nagyné Kovács, Teodóra AU - Lukács, István Endre AU - Szabó, Anna AU - Hernádi, Klára AU - Igricz, T. AU - Nagyné László, Krisztina AU - Szilágyi, Imre Miklós AU - Pokol, G. TI - Effect of pH in the hydrothermal preparation of monoclinic tungsten oxide JF - JOURNAL OF SOLID STATE CHEMISTRY J2 - J SOLID STATE CHEM VL - 281 PY - 2020 PG - 7 SN - 0022-4596 DO - 10.1016/j.jssc.2019.121044 UR - https://m2.mtmt.hu/api/publication/31042183 ID - 31042183 AB - This paper presents the preparation of monoclinic WO3 by a one-step hydrothermal method. The effect of very acidic pH (0.1) and the significance of various additives (CH3COOH, NaClO4, Na2SO4) were investigated. To clarify the role of pH on the obtained crystal structure and morphology, every synthesis using pH 1 were repeated, and the effect of temperature, using 180 and 200 °C, was also studied. All samples prepared at pH 0.1 were pure, well crystallized monoclinic WO3 independently from the temperature, the presence and the quality of the additives. At 180 and 200 °C, applying CH3COOH and NaClO4 resulted nanosheets similar in size. With Na2SO4 additive at 180 °C sheets, at 200 °C sheets and also rods formed indicating that SO4 2− was a capping agent only at 200 °C. For comparison, at pH 1 at both temperatures the crystalline phases and the morphologies varied depending on the type of the additive. © 2019 The Authors LA - English DB - MTMT ER - TY - THES AU - Nagyné Kovács, Teodóra TI - Hidrotermális úton előállított volfrám-oxid, volframát és molibdén-oxid nanoszerkezetek PB - Budapesti Műszaki és Gazdaságtudományi Egyetem PY - 2019 UR - https://m2.mtmt.hu/api/publication/31148499 ID - 31148499 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Dudás, Tünde AU - Nagyné Kovács, Teodóra AU - Szilágyi, Imre Miklós AU - Mester, Ferenc TI - Detecting Silver in Silver-Enabled Textiles by a Newly-Developed Portable Device JF - AATCC JOURNAL OF RESEARCH J2 - AATCC J RES VL - 6 PY - 2019 IS - 4 SP - 22 EP - 29 PG - 8 SN - 2472-3444 DO - 10.14504/ajr.6.4.4 UR - https://m2.mtmt.hu/api/publication/30728047 ID - 30728047 LA - English DB - MTMT ER - TY - JOUR AU - Nagyné Kovács, Teodóra AU - Shahnazarova, Gubakhanim AU - Lukács, István Endre AU - Szabó, Anna AU - Hernádi, Klára AU - Igricz, Tamás AU - Nagyné László, Krisztina AU - Szilágyi, Imre Miklós AU - Pokol, György TI - Effect of pH in the Hydrothermal Preparation of Bi2WO6 Nanostructures JF - MATERIALS J2 - MATERIALS VL - 12 PY - 2019 IS - 11 PG - 13 SN - 1996-1944 DO - 10.3390/ma12111728 UR - https://m2.mtmt.hu/api/publication/30705327 ID - 30705327 LA - English DB - MTMT ER - TY - JOUR AU - Nagyné Kovács, Teodóra AU - Malik, Adrienn AU - Szenkovits, Arshak AU - Lukács, István Endre AU - Szilágyi, Imre Miklós AU - Pokol, György TI - Effect of Different Anions Upon the WO3 Morphology and Structure JF - JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY J2 - J NANOSCI NANOTECHNO VL - 19 PY - 2019 IS - 1 SP - 498 EP - 501 PG - 4 SN - 1533-4880 DO - 10.1166/jnn.2019.15790 UR - https://m2.mtmt.hu/api/publication/30370760 ID - 30370760 AB - In this study the effects of various anions (SO42-, ClO4- and PO43-) were investigated on the hydrothermal treatment of WO3 from Na2WO4 and HCl at 180 and 200 degrees C. The products were analyzed by XRD and SEM. With the usage of SO42- the obtained product was hexagonal (h-) WO3 in the form of nanorods at both temperatures. Applying ClO4- resulted in a mixture of WO3 center dot 0.33H(2)O and small amount of m-WO3 at 180 degrees C and pure WO3 center dot 0.33H(2)O at 200 degrees C. The morphology was consisted of cuboid shapes arranged into spherical structures at 180 degrees C and longitudinal ones at 200 degrees C. By the application of PO43- no product formed at either temperature. Using the combination of SO42-, and ClO4- the product was h-WO3 at both 180 and 200 degrees C with rod-like crystals; thus, the effect of ClO4- was overdominated by the SO42- ions. Utilization of PO43- together with SO42-, and/or ClO4- resulted again in no product, meaning that adding PO43- to the reaction mixture completely blocks the hydrothermal formation of solid products by forming water soluble phosphotungstic acids. LA - English DB - MTMT ER - TY - JOUR AU - Cristina, Maria Vladut AU - Susana, Mihaiu AU - Szilágyi, Imre Miklós AU - Nagyné Kovács, Teodóra AU - Irina, Atkinson AU - Oana, Catalina Mocioiu AU - Simona, Petrescu AU - Maria, Zaharescu TI - Thermal investigations of the Sn–Zn–O gels obtained by sol–gel method JF - JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY J2 - J THERM ANAL CALORIM VL - 136 PY - 2019 IS - 2 SP - 461 EP - 470 PG - 10 SN - 1388-6150 DO - 10.1007/s10973-018-7641-9 UR - https://m2.mtmt.hu/api/publication/3421232 ID - 3421232 N1 - Institute of Physical Chemistry, Ilie Murgulescu” of the Romanian Academy, 202 Splaiul Independentei, Bucharest, 060021, Romania Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Műegyetem rakpart 3, Budapest, 1111, Hungary Cited By :2 Export Date: 11 March 2021 CODEN: JTACF Correspondence Address: Vladut, C.M.; Institute of Physical Chemistry, 202 Splaiul Independentei, Romania; email: vladut@icf.ro Funding details: VEKOP-2.3.2-16-2017-00013 Funding details: K 124212, TNN_16 123631 Funding details: European Commission, EC Funding details: Magyar Tudományos Akadémia, MTA, ÚNKP-17-4-IV-BME-188 Funding details: European Regional Development Fund, FEDER, 19/01.03.2009, PN-II-PT-PCCA-2013-4-1487 Funding text 1: I. M. Szil?gyi thanks for a J?nos Bolyai Research Fellowship of the Hungarian Academy of Sciences and an ?NKP-17-4-IV-BME-188 grant supported by the ?NKP-17-4-IV New National Excellence Program of the Ministry of Human Capacities, Hungary. The research within project No. VEKOP-2.3.2-16-2017-00013 was supported by the European Union and the State of Hungary, co-financed by the European Regional Development Fund. An NRDI K 124212 and an NRDI TNN_16 123631 grants are acknowledged. A Romanian Academy?Hungarian Academy of Sciences Joint Research Project for Research Mobility is acknowledged. We acknowledge as well the support of the EU (ERDF) and Romanian Government that allowed for the acquisition of the research infrastructure under POS-CCE O 2.2.1 project INFRANANOCHEM?No. 19/01.03.2009, and PN-II-PT-PCCA-2013-4-1487 project, Electronic Nose for detection of low concentration pollutant and explosive gases. Funding text 2: Acknowledgements I. M. Szilágyi thanks for a János Bolyai Research Fellowship of the Hungarian Academy of Sciences and an ÚNKP-17-4-IV-BME-188 grant supported by the ÚNKP-17-4-IV New National Excellence Program of the Ministry of Human Capacities, Hungary. The research within project No. VEKOP-2.3.2-16-2017-00013 was supported by the European Union and the State of Hungary, co-financed by the European Regional Development Fund. An NRDI K 124212 and an NRDI TNN_16 123631 grants are acknowledged. A Romanian Academy–Hungarian Academy of Sciences Joint Research Project for Research Mobility is acknowledged. We acknowledge as well the support of the EU (ERDF) and Romanian Government that allowed for the acquisition of the research infrastructure under POS-CCE O 2.2.1 project INFRANANOCHEM—No. 19/01.03.2009, and PN-II-PT-PCCA-2013-4-1487 project, Electronic Nose for detection of low concentration pollutant and explosive gases. Funding Agency and Grant Number: Janos Bolyai Research Fellowship of the Hungarian Academy of SciencesHungarian Academy of Sciences; New National Excellence Program of the Ministry of Human Capacities, Hungary [UNKP-17-4-IV-BME-188, UNKP-17-4-IV]; European UnionEuropean Commission [VEKOP-2.3.2-16-2017-00013]; State of Hungary; European Regional Development FundEuropean Commission; NRDI [K 124212, TNN_16 123631]; EU (ERDF)European Commission [19/01.03.2009, PN-II-PT-PCCA-2013-4-1487]; Romanian Government [19/01.03.2009, PN-II-PT-PCCA-2013-4-1487] Funding text: I. M. Szilagyi thanks for a Janos Bolyai Research Fellowship of the Hungarian Academy of Sciences and an UNKP-17-4-IV-BME-188 grant supported by the UNKP-17-4-IV New National Excellence Program of the Ministry of Human Capacities, Hungary. The research within project No. VEKOP-2.3.2-16-2017-00013 was supported by the European Union and the State of Hungary, co-financed by the European Regional Development Fund. An NRDI K 124212 and an NRDI TNN_16 123631 grants are acknowledged. A Romanian Academy-Hungarian Academy of Sciences Joint Research Project for Research Mobility is acknowledged. We acknowledge as well the support of the EU (ERDF) and Romanian Government that allowed for the acquisition of the research infrastructure under POS-CCE O 2.2.1 project INFRANANOCHEM-No. 19/01.03.2009, and PN-II-PT-PCCA-2013-4-1487 project, Electronic Nose for detection of low concentration pollutant and explosive gases. LA - English DB - MTMT ER - TY - JOUR AU - Nagyné Kovács, Teodóra AU - Studnicka, L AU - Kincses, Annamária AU - Spengler, Gabriella AU - Molnár, Mónika AU - Tolner, Mária AU - Lukács, István Endre AU - Szilágyi, Imre Miklós AU - Pokol, György TI - Synthesis and characterization of Sr and Mg-doped hydroxyapatite by a simple precipitation method JF - CERAMICS INTERNATIONAL J2 - CERAM INT VL - 44 PY - 2018 IS - 18 SP - 22976 EP - 22982 PG - 7 SN - 0272-8842 DO - 10.1016/j.ceramint.2018.09.096 UR - https://m2.mtmt.hu/api/publication/3415888 ID - 3415888 LA - English DB - MTMT ER - TY - JOUR AU - Ragács, Nikoletta AU - Nagyné Kovács, Teodóra AU - Szilágyi, Imre Miklós AU - Kerekes, Zsuzsanna TI - HŐSZIGETLŐK TERMOANALITIKAI VIZSGÁLATA KÖRNYEZETSZENNYEZÉS SZEMPONTJÁBÓL JF - VÉDELEM TUDOMÁNY : KATASZTRÓFAVÉDELMI ONLINE TUDOMÁNYOS FOLYÓIRAT J2 - VÉDELEM TUDOMÁNY VL - 3 PY - 2018 IS - 2 SP - 35 EP - 50 PG - 16 SN - 2498-6194 UR - https://m2.mtmt.hu/api/publication/3375326 ID - 3375326 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Nagyné Kovács, Teodóra AU - Pokol, G AU - Gáber, F AU - Nagy, Dávidné AU - Igricz, Tamás AU - Lukács, István Endre AU - Fogarassy, Zsolt AU - Balázsi, Katalin AU - Szilágyi, Imre Miklós TI - Preparation of iron tungstate (FeWO4) nanosheets by hydrothermal method JF - MATERIALS RESEARCH BULLETIN J2 - MATER RES BULL VL - 95 PY - 2017 SP - 563 EP - 569 PG - 7 SN - 0025-5408 DO - 10.1016/j.materresbull.2017.08.031 UR - https://m2.mtmt.hu/api/publication/3303802 ID - 3303802 LA - English DB - MTMT ER -