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Design of experiments as a strategy for modulating the colloidal stability, physico-chemical properties and drug-delivery potential of small mesoporous silica nanoparticles

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Advanced Powder Technology 2023年第10期34卷

作者： Lestari, Windy Ayu Saputra, Ozi Adi Díaz-García, Diana Wahyuningsih, Sayekti Gómez-Ruiz, Santiago Wibowo, Fajar Rakhman Magister Program in Chemistry Faculty of Mathematics and Natural Sciences Universitas Sebelas Maret Surakarta57126 Indonesia Department of Chemistry Faculty of Mathematics and Natural Sciences Universitas Sebelas Maret Surakarta57126 Indonesia COMET-NANO Group Departamento de Biología y Geología Física y Química Inorgánica Universidad Rey Juan Carlos Calle Tulipán s/n Madrid MóstolesE-28933 Spain Institute of Chemistry Taiwan International Graduate Program Sustainable Chemical Science and Technology Academia Sinica Taipei115 China Department of Chemical Engineering National Taiwan University Taipei10617 China

The synthesis of highly stable small mesoporous silica nanoparticles (SMSN) in colloid dispersions is still challenging for biomedical applications. This study is focus on the successfully synthesis and formulation of porous, highly dispersed and colloidal stable SMSN via the soft–templating method. This study reports how the differences in synthesis variables, namely, temperature, amount of triethylamine (TEA) and/or cetyltrimethylammonium bromide (CTAB) influence the morphology and textural properties of SMSN. The analysis of the particle size, surface area, pore size, pore volume, zeta potential, and colloidal stability (represent by absorbance decreasing rate) show that temperature is the most influential factor governing the preparation of SMSN. The optimal conditions found for the synthesis of these nanoparticles were 50 °C, using a molar ratio between TEA and CTAB (3.5971: 1). Therefore, our study shows interesting insights on the effect of each variable to control the morphology and properties of small MSN for the design of this kind of nanoparticulated systems, therefore, giving valuable data to be considered for the future construction of tailor-made effective drug carrier materials. © 2023 The Society of Powder Technology Japan

关键词： Synthesis (chemical)

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The effectiveness of domestic wastewater treatment in reducing BOD and COD levels: A literature review

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AIP Conference Proceedings 2023年第1期2683卷

作者： Yuli Handayani Syafrudin Syafrudin Suherman Suherman Master Program of Environmental Science School of Postgraduate Studies Universitas Diponegoro Semarang Indonesia Department of Environmental Engineering Faculty of Engineering Universitas Diponegoro Semarang Indonesia Department of Chemical Engineering Faculty of Engineering Universitas Diponegoro Semarang Indonesia

80% of the use of clean water by the community becomes wastewater which must be managed first before being discharged into surface water bodies not to cause disturbances to the water body environment, public health, and environmental aesthetics. This study examines the effectiveness of seven reactors for domestic wastewater treatment in reducing levels of Biochemical Oxygen Demand (BOD) and chemical Oxygen Demand (COD). These reactors are the Moving Bed Biofilter Reactor (MBBR) with kaldness media, only MBBR, filtration pipes, the addition of papaya seed bio coagulant, Up-flow Anaerobic Sludge Blanket (UASB), pipes filled with soil, and a combination of filtration and Anaerobic Baffled Reactor (ABR). This research was conducted with a descriptive method of literature review. The results showed that the reactors, respectively, reduced BOD levels by 83.3%; 78.9%; 15.75%; 93%; 36.9%; 76%; and 79%. They were able to reduce COD levels by 84.2%; 80.58%; 16.79%; 93%; 67.8%; 58%; and 68%. The addition of papaya seed bio coagulant is the most effective reactor to reduce BOD and COD because it contains tannin compounds that have effective clotting ability.

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Classic Fluorophores With a Horizontal Alignment for Enhancing Light Outcoupling Efficiency (≈30%) and External Quantum Efficiency (≈7%) of Near Ultraviolet (λmax < 400 nm) Organic Light-Emitting Diodes

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Advanced Optical Materials 2023年第8期11卷

作者： Lee, Jian Haur Huang, Jing-Xiang Chen, Chia-Hsun Lee, Yi-Ting Chan, Chin-Yiu Dzeng, Yi-Chung Tang, Po-Wen Chen, Chi Adachi, Chihaya Chiu, Tien-Lung Lee, Jiun-Haw Chen, Chin-Ti Sustainable Chemical Science and Technology Taiwan International Graduate Program and Institute of Chemistry Academia Sinica Taipei11529 Taiwan Department of Applied Chemistry National Yang Ming Chiao Tung University Hsinchu30010 Taiwan Department of Electrical Engineering Graduate Institute of Photonics and Optoelectronics National Taiwan University Taipei10617 Taiwan Kyushu University Fukuoka819-0395 Japan Research Center for Applied Sciences Academia Sinica Taipei11529 Taiwan Department of Electrical Engineering Yuan Ze University Taoyuan32003 Taiwan

Based on the classic 1,1′:4′,1″-terphenyl fluorophore, a novel near-ultraviolet (NUV) fluorescent BB4Ph (4,4″′-bis(2,3,4,5-tetraphenylphen-1-yl)(1,1′:4′,1″-terphenyl) is designed, synthesized, and characterized. BB4Ph exhibits a NUV fluorescence with a λmax of 373 and 380 nm in solution and as a thin film, respectively. The grazing incidence wide-angle X-ray scattering (GIWAXS) reveals BB4Ph having a high value of order parameter (SGIWAXS) of 0.59 for a molecular layer array normal to the substrate;the angle-dependent photoluminescence (ADPL) measurement shows Θ (horizontal–dipole ratios) as high as 95% with the neat film. The non-doped BB4Ph organic light-emitting diodes (OLEDs) show external quantum efficiency (EQE) up to 5.24% with 1931 Commission Internationale de l’ Eclairage coordinates (CIEx,y) of (0.16, 0.04), a NUV electroluminescence. With 4P-Cz (9,9′-(1,1′:4′,1″:4″,1′″-quaterphenyl-4,4′″-diyl)dicarbazole) as a dopant emitter, doped BB4Ph OLEDs show the highest EQE of 6.99% and a NUV 1931 CIEx,y (0.16, 0.04). The photoluminescence quantum yield is measured for the thin film of BB4Ph and 4P-Cz:BB4Ph as 68% and 96%, respectively. Hence, the low limits of light outcoupling efficiency (ηout) of the two individual OLEDs are estimated as 31% and 29%, respectively. © 2023 Wiley-VCH GmbH.

关键词： Thin films

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Graphene Acid Quantum Dots: A Highly Active Multifunctional Carbon Nano Material that Intervene in the Trajectory Towards Neurodegeneration

SSRN

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SSRN 2024年

作者： ElMorsy, Sherin M. Gutierrez, Denisse A. Valdez, Salvador Kumar, Jyotish Aguilera, Renato J. Noufal Sanad, Mohamed Sarma, Hemen Chinnam, Sampath Narayan, Mahesh The Environmental Science & Engineering Program The University of Texas at El Paso El PasoTX79968 United States Cellular Characterization and Biorepository Core Facility Border Biomedical Research Center Department of Biological Sciences College of Science The University of Texas at El Paso 500 West University Avenue El PasoTX79968-0519 United States Department of Chemistry and Biochemistry The University of Texas at El Paso 500 West University Avenue El PasoTexas79968 United States Department of Chemical Engineering Hampton University HamptonVA23668 United States Assam Kokrajhar783370 India Department of Chemistry M.S. Ramaiah Institute of Technology Karnataka Bengaluru560054 India Autonoumous Institution Affiliated to Visvesvaraya Technological University Belgaum India

Carbon dots (CDs) are carbon nano materials (CNMs) that find use across several biological applications because of their water solubility, biocompatible nature, eco-friendliness, and ease of synthesis. Additionally, their physiochemical properties can be chemically tuned for further optimization towards specific applications. Here, we investigate the efficacy of C70-derived Graphene Acid Quantum Dots (GAQDs) in mitigating the transformation of soluble, monomeric Hen Egg-White Lysozyme (HEWL) to mature fibrils during its amyloidogenic trajectory. Our findings reveal that GAQDs exhibit dose-dependent inhibition of HEWL fibril formation (up to 70% at 5 mg/mL) without affecting mitochondrial membrane potential or inducing apoptosis at the same density. Furthermore, GAQDs scavenged reactive oxygen species (ROS);achieving a 50% reduction in ROS levels at a mere 100 µg/mL when exposed to a standard free radical generator. GAQDs were not only found to be biocompatible with a human neuroblastoma-derived SHSY-5Y cell line but also rescued the cells from rotenone-induced apoptosis. The GAQD-tolerance of SHSY-5Y cells coupled with their ability to restitute cells from rotenone-dependent apoptosis, when taken in conjunction with the biocompatibility data, indicate that GAQDs possess neuroprotective potential. The data position this class of CNMs as promising candidates for resolving aberrant cellular outputs that associate with the advent and progress of multifactorial neurodegenerative disorders including Parkinson's (PD) and Alzheimer’s diseases (AD) wherein environmental causes are implicated (95% etiology). The data suggest that GAQDs are a multifunctional carbon-based sustainable nano-platform at the intersection of nanotechnology and neuroprotection for advancing green chemistry-derived, sustainable healthcare solutions. © 2024, The Authors. All rights reserved.

关键词： Graphene

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Catalytic Peroxymonosulfate activation via In-Situ ketone Derivatives: Unveiling dual kinetics in electrochemical degradation

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Separation and Purification Technology 2025年 375卷

作者： Zhen Liu Rong Liu Siqi Chen Mengyu Li Yuhang Liu Bangxing Ren Huan He Shuquan He Xiaodi Duan Yao Chen School of River and Ocean Engineering Chongqing Jiaotong University Chongqing 400074 China Engineering Laboratory of Environmental Hydraulic Engineering of Chongqing Municipal Development and Reform Commission Chongqing Jiaotong University Chongqing 400074 China Environmental Engineering and Science Program Department of Chemical and Environmental Engineering (ChEE) University of Cincinnati Cincinnati OH 45221-0071 USA School of Environmental Science and Engineering Kunming University of Science and Technology Kunming Yunnan 650500 China Key Laboratory of Organic Compound Pollution Control Engineering (MOE) School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China

This study reports for the first time the dual kinetics phenomenon triggered by the in situ generated ketone derivatives in the cathode chamber and reveals the mode of catalytic persulfate activation through electron exchange by the conversion of ketone functional groups to ketone derivatives. The experimental results show that the reaction rate constant in the rapid degradation stage in the cathode chamber (42.62 × 10 -2 min −1 ) is significantly higher than that in the induction stage (2.11 × 10 -2 min −1 ), achieving 98.96 % removal within 25 min. The intermediate validation experiments indicate that the in-situ generation of ketone-containing intermediates in the cathode chamber increases the steady-state concentration of reactive species (from 1.71 × 10 -10 to 1.08 × 10 -9 ML -1 ), which is the main reason for the increased reaction rate. The ketone capture experiments and density functional theory (DFT) calculations show that the intermediates with ketone functional groups exchange electrons with persulfate ions under alkaline conditions and in the presence of an electric field, generating additional sulfate radicals and singlet oxygen. In the cathode chamber, the electrochemical activation of Peroxymonosulfate (PMS) by ketones on intermediate products is expected to become an inherent catalytic technology for the selective oxidation of pollutants occurring in aquatic environments.

关键词： Rate constants

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The effect of granular palm shell activated carbon to reduce CO, HC, and noise on motorcycle Emissions

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AIP Conference Proceedings 2024年第1期3074卷

作者： Maria Roosa Srah Darmanijati Pranoto Ari Handono Ramelan Inayati Doctoral Program of Environmental Science Department Post Graduate School of Sebelas Maret University Surakarta Indonesia Chemistry Department Mathematic and Natural Science FacultySebelas Maret University Surakarta Indonesia Chemical Engineering Department Chemistry Engineering Sebelas Maret University Surakarta Indonesia

The use of motorcycles increased rapidly. Data from Yogyakarta Central Bureau Statistics showed from 2015 to 2019 the number of motorized vehicles increased by 8% every year. Motor vehicle air pollution comes from exhaust gases resulting from combustion. Becak Motorcycles are widely used in Yogyakarta and are usually used motorcycles with a long life. Hydrocarbons (HC) or unburned fuel and carbon monoxide (CO), were air-fuel control. This research was studied to determine the ability of palm shell activated charcoal to reduce CO, HC and noise. The 14 meshes sample diameter placed inside the tube from 24 meshes of stainless steels were prepared. The weight of activated charcoal of 10 grams, 20 grams and 30 grams were tried to reduce the In the exhaust of a 1984 Suzuki motorcycle with plate number AB 4194 CK, an exhaust extension was installed, then palm activated carbon was placed inside and the emission gases were measured. Stages 898 was used to test the emission. The smallest size could adsorb the largest emissions and noise. The weight of activated charcoal of 10 grams, 20 grams and 30 grams 14 meshes could reduce CO, HC and noise emission were 0.294 % to 0.616 %, 454 ppm to 798 ppm, -o.63 dB to 1.6 dB, respectively. The weight of activated charcoal of 10 grams, 20 grams and 30 grams 14 meshes saturated time were 270 seconds, 173 seconds and 299 seconds, respectively.

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Shin et al. Reply:

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Physical Review Letters 2023年第5期131卷 059602-059602页

作者： Dongbin Shin Nicolas Tancogne-Dejean Jin Zhang Mahmut Sait Okyay Angel Rubio Noejung Park Max Planck Institute for the Structure and Dynamics of Matter and Center for Free-Electron Laser Science Luruper Chaussee 149 22761 Hamburg Germany Department of Physics and Photon Science Gwangju Institute of Science and Technology (GIST) Gwangju 61005 Republic of Korea Materials Science & Engineering Program Department of Chemical & Environmental Engineering Department of Physics & Astronomy and Department of Chemistry University of California-Riverside Riverside 92521 California USA Nano-Bio Spectroscopy Group Departamento de Fsica de Materiales Universidad del Pas Vasco 20018 San Sebastian Spain Center for Computational Quantum Physics (CCQ) The Flatiron Institute 162 Fifth avenue New York New York 10010 USA Department of Physics Ulsan National Institute of Science and Technology (UNIST) UNIST-gil 50 Ulsan 44919 Korea

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Local Order Metrics for Two-Phase Media Across Length Scales

arXiv

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arXiv 2022年

作者： Torquato, Salvatore Skolnick, Murray Kim, Jaeuk Department of Chemistry Department of Physics Princeton Institute for the Science and Technology of Materials Program in Applied and Computational Mathematics Princeton University PrincetonNJ08544 United States Department of Chemistry Princeton University PrincetonNJ08544 United States McKetta Department of Chemical Engineering University of Texas at Austin AustinTX78712 United States

The capacity to devise order metrics for microstructures of multiphase heterogeneous media is a highly challenging task, given the richness of the possible geometries and topologies of the phases that can arise. This investigation initiates a program to formulate order metrics to characterize the degree of order/disorder of the microstructures of two-phase media in d-dimensional Euclidean space Rd across length scales. In particular, we propose the use of the local volume-fraction variance σV2 (R) associated with a spherical window of radius R as an order metric. We determine σV2 (R) as a function of R for 22 different models across the first three space dimensions, including both hyperuniform and nonhyperuniform systems with varying degrees of short- and long-range order. We find that the local volume-fraction variance as well as asymptotic coefficients and integral measures derived from it provide reasonably robust and sensitive order metrics to categorize disordered and ordered two-phase media across all length scales. © 2022, CC BY-SA.

关键词： Volume fraction

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Correction:Nanomaterial-Based Repurposing of Macrophage Metabolism and Its Applications

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Nano-Micro Letters 2024年第12期16卷 357-357页

作者： Tingting Meng Danfeng He Zhuolei Han Rong Shi Yuhan Wang Bibo Ren Cheng Zhang Zhengwei Mao Gaoxing Luo Jun Deng Institute of Burn Research Southwest HospitalState Key Laboratory of Trauma and Chemical PoisoningArmy Medical UniversityChongqing 400038People’s Republic of China Department of Breast Surgery Gansu Provincial HospitalLanzhouGansu 730030People’s Republic of China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China

Following publication of the original article[1],the authors reported an error in the last author’s name,it was mistakenly written as“Jun Den”.The correct author’s name“Jun Deng”has been updated in this Correction.

关键词： mistake correct Correction

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Analysis study and experiments SEM-EDS of particles and porosity of empty fruit bunches

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Case Studies in chemical and Environmental engineering 2024年 9卷

作者： Erdiwansyah Gani, Asri Desvita, Hera Mahidin Viena, Vera Mamat, Rizalman Sardjono, Ratnaningsih Eko Faculty of Engineering Universitas Serambi Mekkah Banda Aceh 23245 Indonesia Department of Chemical Engineering Universitas Syiah Kuala Banda Aceh 23111 Indonesia Oil Palm and Coconut Research Center Universitas Syiah Kuala Banda Aceh 23111 Indonesia Department of Natural Resources and Environmental Management Universitas Serambi Mekkah Banda Aceh 23245 Indonesia Research Center for Chemistry National Research and Innovation Agency B.J. Habibie Science and Techno Park Serpong Banten South Tangerang 15314 Indonesia Department of Environment Engineering Universitas Serambi Mekkah Banda Aceh 23245 Indonesia Centre for Automotive Engineering Universiti Malaysia Pahang Pekan 26600 Malaysia Chemistry Program Universitas Pendidikan Indonesia Setiabudi 229 Bandung 40154 Indonesia

Palm oil biomass waste has a high energy value and can be converted into fuel. However, the high ash content from burning biomass waste is undesirable. This research aims to analyze the porosity values and length of particles from empty-fruit-bunches biomass samples different treatments. Analysis of the porosity and particle length of empty fruit bunches is the latest in this research. The analysis results show that the R-Square value with the regression model for each sample is (raw 0.88375, flowrate 1L/sec 0.99997, and temperature 30 °C 0.99996). Meanwhile, porosity value of each sample (raw 84.55 %, flowrate 1L/sec 89.08%, temperature 30 °C 88.50 %). © 2024 The Authors

关键词： Biocoke fuel Energy production Experimental analysis SEM-EDS Sustainable fuel

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