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Efficient degradation of dye pollutant via Z-scheme ball milled ZnO-LaO-S powder photocatalyst

Transactions of Nonferrous Metals Society of China 2024年

作者： Saeid ZAREI Hossein RAANAEI Sara AHMADI saeed kamali Department of Physics， Faculty of Nano and Bio Science and Technology， Persian Gulf University Chemistry Department， Faculty of Science， University of Malaya Department of Physics and Astronomy， Middle Tennessee State University

This investigation aimed to analyze the degradation of Eriochrome Black T （EBT） dye using a semiconductor photocatalyst synthesized through mechanical alloying. Various characterization methods， including X-ray diffraction （XRD）， energy-dispersive X-ray spectroscopy （EDX）， and X-ray photoelectron spectroscopy （XPS）， were employed to study the properties of the photocatalysts. After 35 h of milling， a ball milled mixed metal oxides was formed as confirmed by XRD analysis. EDX and XPS analyses revealed significant differences in adsorption features with and without light exposure. The band gap of the 35 h ball milled sample was determined to be 4.08 eV. To optimize the EBT degradation， artificial neural network genetic algorithms were used to determine the optimal values for ZnO-La2O3dosage， lamp power， and pH， which were found to be 0.43， 52.06， and 3， respectively. The Z-scheme mechanism， supported by band gap， Fermi level， and work function analysis， was found to be responsible for the photocatalytic process. The photocatalysts demonstrated good reusability and high stability. Overall， the results suggest that the synthesized photocatalyst holds promising potential for the degradation of EBT dye in wastewater treatment.

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Porosity prediction from seismic inversion of a similarity attribute based on a pseudo-forward equation(PFE):a case study from the North Sea Basin,Netherlands

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Petroleum Science 2015年第3期12卷 428-442页

作者： saeed Mojeddifar Gholamreza kamali Hojjatolah Ranjbar Department of Mining Engineering Shahid Bahonar University of Kerman

The objective of this work is to implement a pseudo-forward equation which is called PFE to transform data （similarity attribute） to model parameters （porosity） in a gas reservoir in the F3 block of North Sea. This equation which is an experimental model has unknown constants in its structure; hence, a least square solution is applied to find the best constants. The results derived from solved equa- tions show that the errors on measured data are mapped into the errors of estimated constants; hence, Tikhonov regularization is used to improve the estimated parameters. The results are compared with a conventional method such as cross plotting between acoustic impedance and porosity values to validate the PFE model. When the testing dataset in sand units was used, the correlation coefficient between two variables （actual and predicted values） was obtained as 0.720 and 0.476 for PFE model and cross-plotting analysis, respectively. Therefore, the testing dataset validates rela- tively well the PFE optimized by Tikhonov regularization in sand units of a gas reservoir. The obtained results indi- cate that PFE could provide initial information about sandstone reservoirs. It could estimate reservoir porosity distribution approximately and it highlights bright spots and fault structures such as gas chimneys and salt edges.

关键词： Keywords Porosity Seismic inversion Tikhonovregularization Similarity

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铊在多壁碳纳米管上的吸附(英文)

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新型炭材料 2012年第6期27卷 409-415页

作者： saeed ur Rehman Najeeb Ullah Ali Reza kamali Khurshid Ali Cemile Yerlikaya Hanif ur Rehman Institute of Chemical Sciences University of PeshawarPeshawarPakistan Department of Materials Science and Metallurgy University of CambridgePembroke StreetCambridge CB2 3QZUK Chemical Engineering Department Chemical and Metallurgical FacultyIstanbul Technical UniversityIstanbul 34469Turkey

多壁碳纳米管采用H2SO4,KMnO4,HNO3氧化处理后用于铊吸附研究。碳纳米管经处理后表面官能团增加,采用Bohmn滴定法确定了样品的表面官能团的量。当用于吸附铊时,氧化处理显著提高了其吸附能力。采用Langmuir方程进行拟合处理后获得原始... 详细信息

多壁碳纳米管采用H2SO4,KMnO4,HNO3氧化处理后用于铊吸附研究。碳纳米管经处理后表面官能团增加,采用Bohmn滴定法确定了样品的表面官能团的量。当用于吸附铊时,氧化处理显著提高了其吸附能力。采用Langmuir方程进行拟合处理后获得原始碳纳米管、H2SO4,KMnO4,HNO3氧化处理后样品的吸附量分别为3.0,11.7,21.6 and 31.55mg/g。HNO3处理后具有对铊最佳的吸附性能。

关键词：铊多壁碳纳米管吸附氧化

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Recharging Sensor Nodes Using Implicit Actor Coordination in Wireless Sensor Actor Networks

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Wireless Sensor Network 2010年第2期2卷 123-128页

作者： Mohsen Sharifi saeed Sedighian Maryam kamali 不详

Wireless sensor actor networks are composed of sensor and actor nodes wherein sensor nodes outnumber resource-rich actor nodes. Sensor nodes gather information and send them to a central node (sink) and/or to actors for proper actions. The short lifetime of energy-constrained sensor nodes can endanger the proper operation of the whole network when they run out of power and partition the network. Energy harvesting as well as minimizing sensor energy consumption had already been studied. We propose a different approach for recharging sensor nodes by mobile actor nodes that use only local information. Sensor nodes send their energy status along with their sensed information to actors in their coverage. Based on this energy information, actors coordinate implicitly to decide on the timings and the ordering of recharges of low energy sensor nodes. Coordination between actors is achieved by swarm intelligence and the replenishment continues during local learning of actor nodes. The number of actors required to keep up such networks is identified through simulation using VisualSense. It is shown that defining the appropriate number of actor nodes is critical to the success of recharging strategies in prolonging the network lifetime.

关键词： Wireless Sensor Actor Networks Coordination Energy Harvesting Swarm Intelligence

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