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Heterogeneous catalytic oxidative desulfurization of dibenzothiophene of metal oxide–Mg/Al layered double hydroxide

Environmental science and Pollution Research 2025年第13期32卷 8555-8563页

作者： Ahmad, Nur Hanifah, Yulizah Arsyad, Fitri Suryani Lesbani, Aldes Graduate School of Mathematics and Natural Sciences Faculty of Mathematics and Natural Sciences Universitas Sriwijaya Sumatera Selatan Palembang30139 Indonesia Research Center of Inorganic Materials and Coordination Complexes Universitas Sriwijaya Sumatera Selatan Palembang30139 Indonesia Research Center for Chemistry National Research and Innovation Agency Building 452 KST BJ Habibie Banten Serpong Tangerang Selatan15311 Indonesia Master Program of Material Science Graduate School Universitas Sriwijaya Sumatera Selatan Palembang30139 Indonesia

Mg/Al-TiO2 and Mg/Al-ZnO were successfully prepared for dibenzothiophene catalytic oxidative desulfurization. XRD, FTIR, TEM, and BET analyses were utilized to characterize the catalyst. In composites, the distinctive XRD patterns of precursors are still observable. FTIR spectra of the absorption bands were at 3448, 1627, 1381, 601, and 547 cm−1. The TEM pictures of the sample also revealed the almost spherical and hexagonal platelets of Mg/Al-LDH and its composite. Mg/Al LDH, Mg/Al-TiO2, and Mg/Al-ZnO had typical pore sizes of 35.78 nm, 52.81 nm, and 38.37 nm, respectively. The graph of nitrogen isotherms Mg/Al LDH, Mg/Al-TiO2, and Mg/Al-ZnO followed type IV isotherms. In addition, the conversion rates on Mg/Al-ZnO, Mg/Al-TiO2, ZnO, Mg/Al-LDH, and TiO2 were 99.34%, 99.50%, 91.20%, 96.29%, and 88.06%, respectively. This work presents alternative materials for the oxidative desulfurization of dibenzothiophene in practical applications. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2025.

关键词： Zinc oxide

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Synergetic effects of multiple junction and surface hydroxyl in Cu/CuO/Cu2O/TiO2 heterostructures towards highly efficient photocatalysts for hydrogen generation

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materials science for Energy Technologies 2025年 8卷 131-142页

作者： Subagyo, Riki Anindika, Garcelina Rizky Aufkani, Afif Akmal Zhang, Lei Ardhyananta, Hosta Burhan, R.Y. Perry Nugraheni, Zjahra Vianita Akhlus, Syafsir Bahruji, Hasliza Prasetyoko, Didik Wellia, Diana Vanda Ivansyah, Atthar Luqman Arramel Kusumawati, Yuly Department of Chemistry Faculty of Science and Analytic Data Institut Teknologi Sepuluh Nopember Surabaya60111 Indonesia Center of Excellence Applied Physics and Chemistry Nano Center Indonesia Jl PUSPIPTEK South Tangerang Banten15314 Indonesia Department of Physics National University of Singapore Singapore117551 Singapore Department of Materials and Metallurgical Engineering Faculty of Industrial Technology and Systems Engineering Institut Teknologi Sepuluh Nopember Surabaya60111 Indonesia Centre of Advanced Material and Energy Science Universiti Brunei Darussalam Jalan Tungku Link BE 1410 Brunei Department of Chemistry Faculty of Mathematics and Natural Sciences Universitas Andalas Padang25163 Indonesia Master Program in Computational Science Faculty of Mathematics and Natural Science Institut Teknologi Bandung Jalan Ganesha No. 10 Bandung40132 Indonesia Instrumentation and Computational Physics Research Group Department of Physics Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Jalan Ganesha No.10 West Java Bandung40132 Indonesia

The implementation of titanium dioxide (TiO2) as a photocatalyst material in hydrogen (H2) evolution reaction (HER) has embarked renewed interest in the past decade. Rapid electron-hole pairs recombination and wide band gap of a photo-sensitive material of TiO2 are detrimental toward the targeted catalytical reaction. In this study, we present the rational design, fabrication, photocatalytic performance of TiO2-Cu/CuO/Cu2O heterostructures (CuTi) using viable chemical reduction method. The Z-scheme and S-scheme are succesfully generated across the TiO2/CuO/Cu2O interfaces, while the Schottky junction arises on the Cu perimeters. This is evidenced from the blue shifted about 0.3 eV of Cu 2p core level determined by using X-ray photoemission spectroscopy (XPS), in combination with the formation of inverse V-shape of the Mott-Schottky plots. In addition, we find that Cu/CuO/Cu2O facilitates photon absorption range up to the visible region. The multiple heterojunction and the large number of OHsurface enhanced charge carrier transfer are associated to the suppression of photoluminescence (PL) intensity, high surface hydroxyl (OHsurface) density in CuTi probed by XPS, and fast electron transfer based on the electrochemical measurements. The presence of OHsurface inhibits the recombination of electron. A significant H2 photogeneration rate enhancement is achieved when an optimized 5 wt% Cu/CuO/Cu2O concentration is used on TiO2 to achieve 7,157.19 μmol·g−1 (1,789.30 μmol·g−1·h−1). Based on this finding, zero emission energy innitiative could be materialized under multiple heterojunctions in photocatalytic process is beneficial for enhancing the H2 production. © 2025 The Authors

关键词： Titanium dioxide

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Characterization of indigo-doped poly(3-hexylthiophene):-phenyl C61-butyric acid methyl ester bulk heterojunction solar cells

Characterization of indigo-doped poly(3-hexylthiophene):-phe...

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作者： Lu, Yang-Ming Wong, Jing-Syun Hsu, Lien-Chung Master Program of Electro-Optical Engineering Department of Electrical Engineering National University of Tainan Tainan Taiwan Graduate Institute of Material Science and Engineering National Cheng Kung University Tainan Taiwan

Poly(3-hexylthiophene)/[6,6]-phenyl C61-butyric acid methyl ester bulk hetero-junction photovoltaic cells doped with indigo dye as a p-type solar collector were studied. Doping indigo increases the absorption of the visible light spectrum, as determined using ultraviolet-visible spectrophotometry analysis. The photocurrent was measured in air under a solar simulator with AM 1.5G illumination (100 mW/cm2). The best photovoltaic efficiency obtained was 2.55% after doping indigo into the cell. © 2012 Elsevier B.V.

关键词： Organic solar cells

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Automatic essay scoring for discussion forum in online learning based on semantic and keyword similarities

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Asian Association of Open Universities Journal 2023年第3期18卷 262-278页

作者： Dhini, Bachriah Fatwa Girsang, Abba Suganda Sufandi, Unggul Utan Kurniawati, Heny Department of Multimedia Teaching Material Production Center Universitas Terbuka Tangerang Selatan Indonesia Computer Science Department BINUS Graduate Program Master of Computer Science Bina Nusantara University Jakarta Indonesia Faculty of Sains and Technology Universitas Terbuka Tangerang Selatan Indonesia

Purpose: The authors constructed an automatic essay scoring (AES) model in a discussion forum where the result was compared with scores given by human evaluators. This research proposes essay scoring, which is conducted through two parameters, semantic and keyword similarities, using a SentenceTransformers pre-trained model that can construct the highest vector embedding. Combining these models is used to optimize the model with increasing accuracy. Design/methodology/approach: The development of the model in the study is divided into seven stages: (1) data collection, (2) pre-processing data, (3) selected pre-trained SentenceTransformers model, (4) semantic similarity (sentence pair), (5) keyword similarity, (6) calculate final score and (7) evaluating model. Findings: The multilingual paraphrase-multilingual-MiniLM-L12-v2 and distilbert-base-multilingual-cased-v1 models got the highest scores from comparisons of 11 pre-trained multilingual models of SentenceTransformers with Indonesian data (Dhini and Girsang, 2023). Both multilingual models were adopted in this study. A combination of two parameters is obtained by comparing the response of the keyword extraction responses with the rubric keywords. Based on the experimental results, proposing a combination can increase the evaluation results by 0.2. Originality/value: This study uses discussion forum data from the general biology course in online learning at the open university for the 2020.2 and 2021.2 semesters. Forum discussion ratings are still manual. In this survey, the authors created a model that automatically calculates the value of discussion forums, which are essays based on the lecturer's answers moreover rubrics. © 2023, Bachriah Fatwa Dhini, Abba Suganda Girsang, Unggul Utan Sufandi and Heny Kurniawati.

关键词： Discussion forum Essay scoring Keyword similarity Semantic similarity

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"Enhanced Energy Generation Via Composite Catalyst Gasification of In-Situ Plastic Waste"

SSRN

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SSRN 2024年

作者： Abdelrahman, Ameen Erchiqui, Fouad Nedil, Mourad Material science Département School of Engineering Canada Mechanical Engineering Department Université du Québec en Abitibi-Témiscamingue Canada Master of Engineering Program School of Genius

This study responds to the urgent global imperative to address climate change by shifting towards sustainable practices, with a particular focus on mitigating the environmental impact of plastic waste. We delve into the gasification of municipal plastic solid waste as an alternative to traditional disposal methods like incineration or landfilling. Our approach involves the development of composite materials incorporating manganese, titanium, and iron oxides within clay. By optimizing key gasification parameters as heating rate, loading, and reaction time, we aim to maximize gas yields and improve the quality of products. Through characterization techniques XRD, TEM, SEM, GC, and EDX analysis, © 2024, The Authors. All rights reserved.

关键词： Gasification

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Study on synthesis and structural characterization of ZnO-doped g-C3N4materials for treatment of ciprofloxacin antibiotic in water 7

Study on synthesis and structural characterization of ZnO-do...

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7th International Scientific Conference on Applying New Technology in Green Buildings, ATiGB 2022

作者： Ha, Tran Thi Viet Viet, Nguyen Minh Tri, Nguyen Le Minh VNU Vietnam Japan University Master's Program in Environmental Engineering Faculty of Advanced Technologies and Engineering Hanoi Viet Nam VNU University of Science Faculty of Chemistry VNU Key Laboratory of Advanced Material for Green Growth Hanoi Viet Nam Advanced Institute of Materials Science Ton Duc Thang University Laboratory of Advanced Materials Chemistry Faculty of Applied Sciences Ho Chi Minh city Viet Nam

ISBN: (数字)9781665472852

ISBN: (纸本)9781665472852

Recently, the overuse and misuse of antibiotics are key factors leading to many negative problems to human and environment. Therefore, the removal for the antibiotics is very necessary, and photocatalysis is a highly efficient and environmentally friendly treatment method. Graphite carbon nitride (\mathrm{g}-\mathrm{C}_material\mathrm{N}_material) is an organic semiconductor, researched to create a 'new-generation' photocatalytic material system by hybridization with semiconductors such as TiO2 and ZnO, which offers potential energy in the decomposition of organic compounds using the energy of visible light. In this study, ZnO/g-C3N4 materials were synthesized and characterized by advanced techniques, then apply for ciprofloxacin antibiotic (CIP) treatment. The CIP degradation efficiency of the material reached 84.36% and after three times the material was regenerated, ZnO/g-C3N4 composite still showed excellent degradation ability. Therefore, ZnO/g-C3N4 materials can be applied in environmental remediation and many other fields. © 2022 IEEE.

关键词： Antibiotics

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Modification of carbon nanotube with poly(3-hexylthiophene) by using RF rotating plasma

Modification of carbon nanotube with poly(3-hexylthiophene) ...

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IEEE International Conference on Plasma science (ICOPS)

作者： Gamze Celik Cogal Sadik Cogal Aysegul Oksuz Master of Science Program in Engineering in Material Technologies Mehmet Akif Ersoy University Burdur Turkey Faculty of Engineering and Architecture Mehmet Akif Ersoy University Burdur Turkey Faculty of Science and Arts Suleyman Demirel University Isparta Turkey

Carbon nanotubes (CNT) is one of the most investigated materials before the invention of graphene. 1 Due to its unique properties, CNTs have been used in various applications include sensors, solar cells, transistors, etc. 2 However, it makes difficult to make nano-devices based on CNTs at a large scale. For this reason, formation of composite with conducting polymers is a good way for modification of CNT. 3 In this study, CNT was modificated with poly(3-hexylthiophene) by using RF rotating plasma. The obtained modified graphene particles were characterized with FTIR, SEM-EDS, XRD and TGA methods.

关键词： Carbon nanotubes Radio frequency Plasmas Polymers Sun Service-oriented architecture Art

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Using a Composite Catalyst in the Gasification Process, In-Situ Plastic Waste is Converted to Energy

SSRN

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SSRN 2023年

作者： Abdelrahman, Ameen Nedil, Mourad Erchiqui, Fouad Material science Département School of Engineering Canada Mechanical Engineering Department Université du Québec en Abitibi-Témiscamingue Canada Master of Engineering Program School of Genius Canada

The world is eager to find a solution to reduce the phenomenon of climate change and transition to sustainable and renewable resources in all facets of our lives as we live in this period. Climate change and the emission of greenhouse gases are closely related issues. In that study, we focused on finding ways to reduce municipal management of plastic solid waste and conversion to enhance gases and solid carbon instead of direct incineration or disposal. In order to fracture a variety of plastic debris (PEHD, PELD, PVC, and PS) in a fixed bed reactor system, we created composite materials made of three transition metal oxides (manganese, titanium, and iron). These materials were built using layers of bentonite clay. To enrich and improve gas yields and product quality, the gasification reaction has been set up with customizable, parameter-optimized heating rate, loading, and reaction time settings. For the distribution of composites and products, many characterization techniques including XRD, TEM, SEM, GC, and EDX have been used (gas yield, and char weight ratio). © 2023, The Authors. All rights reserved.

关键词： Climate change

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Characterization of Nanocomposite Membrane Based Bacterial Cellulose Made of Pineapple Waste Reinforced by Graphite Nanoplatelets

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Journal of Renewable materials 2022年第9期10卷 2465-2475页

作者： Heru Suryanto Bili Darnanto Susilo Jibril Maulana Aminnudin Uun Yanuhar Surjani Wonorahardjo Husni Wahyu Wijaya Abu Saad Ansari Center of Excellence for Cellulose Composite(CECCom) Department of Mechanical EngineeringUniversitas Negeri MalangMalang65145Indonesia Centre of Advanced Material for Renewable Energy(CAMRY) Universitas Negeri MalangMalang65145Indonesia Master Program of Mechanical Engineering Faculty of EngineeringUniversitas Negeri MalangMalang65145Indonesia Department of Aquatic Resources Management Faculty of Fisheries and Marine SciencesBrawijaya UniversityMalang65145Indonesia Department of Chemistry Faculty of Mathematics and Natural SciencesUniversitas Negeri MalangMalang65145Indonesia Department of Materials Science&Engineering Incheon National UniversityIncheon464-742South Korea

Waste is the main problem for the *** waste for various useful applications has a benefit for the *** work has been studied for handling pineapple peel waste to make composite film bacterial cellulose nanocomposite membrane(BCNM)with addition graphite nanoplatelet(GNP).The concentration of GNP in the membrane influence the membrane *** bacterial cellulose(BC)pellicle was synthesized by using media from pineapple peel waste *** pellicle is cleaned with water and NaOH solution to be free from *** is synthesized through the mechanical disintegration *** results of disintegration using high pressure homogenizer at 150 bar and five ***/GNP is synthesized with varying addition of GNP of 2.5,5.0,10 and 100 wt%of dry bacterial nanocellulose(BNC).The BC and GNP solution were dried in an oven for 14 h at 80℃.BCNM morphology was observed using *** is dispersed and distributed in the BC matrix as *** analysis shows many peaks of BNC less pronounced with increasing of *** higher concentration of GNP,the rougher of *** optimum tensile strength of BCNM was achieved after addition GNP of 2.5 wt%.

关键词： Bacterial nanocellulose graphite nanoplatelet membrane nanocomposite pineapple waste

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The study of structural properties and photocatalytic activity of ZnO prepared by ultrasonic assisted precipitation method 2

The study of structural properties and photocatalytic activi...

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2nd Annual Conference of science and Technology, ANCOSET 2020

作者： Sanusi, S. Setiadji, S. Hakim, N.D. Aziz, S.H.R.A. Sawitri, A. Aliah, H. Hadisantoso, E.P. Ivansyah, A.L. Syarif, D.G. Department of Chemistry Faculty of Science and Technology UIN Sunan Gunung Djati Bandung Jl. A.H. Nasution No.105 Bandung Indonesia Department of Physics Faculty of Science and Technology UIN Sunan Gunung Djati Bandung Jl. A.H. Nasution No.105 Bandung Indonesia Master Program in Computational Science Faculty of Mathematic and Natural Science Institut Teknologi Bandung Jl. Ganesha No. 10 Bandung Indonesia Lab. of Material Physics Badan Tenaga Atom Nasional Jl. Taman Sari Bandung No.71 Bandung Indonesia

ZnO is a semiconductor that has excellent activity as photocatalyst under UV light region. ZnO is precipitated by adding oxalate acid onto zinc acetate dehydrate solution with ultrasonic assisted at various times and flattened at 500 °C. The structural properties of the ZnO samples are characterized by X-Ray Diffraction (XRD) and Brunauer-Emmett-Teller (BET). XRD result has confirmed the ZnO structure as hexagonal phase. Rietveld refinement of XRD pattern by La Beil method is employed to analyze the lattice parameters of ZnO. It provides that ZnO as wurtzite with accurate values. Debye-scherrer equation examines the crystallite size. It is confirmed that the crystallite size of ZnO is decreased by ultrasonic assisted at precipitation. BET result shows that ultrasonic assisted could increase the surface area of ZnO, which are 45.64 m2/g of ZnO without ultrasonic assisted and 143,487 m2/g of ZnO with ultrasonic assisted along 2 hours. The photocatalyst experiment is set up to analyze the photocatalytic activity of ZnO for degradation of methylene blue under UV light irradiation. By significantly that decolorization of methylene blue occurred at pH 10 for 30 minutes irradiation. The photocatalytic activity for ZnO samples with an hour and 2 hours ultrasonic assisted are 79.54 % and 86.50 % respectively, whereas ZnO sample without ultrasonic assisted is 70.90 %, and almost all of methylene blue contaminant have done degraded successfully after 120 minutes irradiation. According to the results, the structural properties and photocatalytic activity of ZnO are increased as consequence to the presence of ultrasonic assisted on precipitation. © Published under licence by IOP Publishing Ltd.

关键词： Zinc oxide

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