Bulletin of Chemical Reaction Engineering & Catalysis最新文献_第2页

Hydrazine-Fueled Solution Combustion Method: Fuel/Oxidizer Ratio Effects on Photocatalytic Performance of Bismuth Oxide 肼燃料溶液燃烧法:燃料/氧化剂比例对氧化铋光催化性能的影响

Bulletin of Chemical Reaction Engineering & Catalysis

Pub Date : 2023-10-08 DOI: 10.9767/bcrec.19943

Yayuk Astuti, Trie Nanda Mulyana, Brainy Happy Ana Tasiman, Adi Darmawan, Hendri Widyandari

Bismuth oxide nanoparticles were synthesized through the solution combustion method with a variation of fuel: oxidizer (hydrazine: bismuth nitrate) ratios (ϕ) of ϕ<1, ϕ=1 (stoichiometrically balanced) and ϕ> 1. Bismuth oxide nanoparticles were characterized by Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and UV-Visible Diffuse Reflectance Spectroscopy (UV-DRS). The FTIR spectra obtained implies that the bismuth oxide nanoparticles of the three ratios contain Bi-O-Bi and Bi-O groups indicating its successful formation. XRD diffractogram suggests that the synthesized bismuth oxide nanoparticles form the α-Bi2O3 crystalline phase for ϕ<1 and ϕ>1; meanwhile a mixture of α-/β- Bi2O3 phases for ϕ=1. The SEM image illustrates that bismuth oxide nanoparticles form pebble shapes with the ratios in the order of increasing particle sizes of ϕ>1, ϕ=1, and ϕ<1. The UV-DRS results show that the bismuth oxide with ϕ<1, ϕ=1, and ϕ>1 have respective band gap energies of 2.76 eV, 2.72 eV, and 2.78 eV. The evaluation of the photocatalytic activity of the three bismuth oxide samples shows bismuth oxide with ϕ=1 has the highest photocatalytic activity in remazol black B and methyl orange dyes with rate constants 6.744 x 10-5 s-1 and 7.369 x 10-5 s-1, respectively. Copyright © 2023 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

采用溶液燃烧法合成氧化铋纳米颗粒，改变燃料:氧化剂(肼:硝酸铋)的ϕ=(化学计量平衡)，ϕ=1和ϕ=(化学计量平衡);1. 采用傅里叶变换红外光谱(FTIR)、x射线衍射(XRD)、扫描电镜(SEM)和紫外可见漫反射光谱(UV-DRS)对氧化铋纳米粒子进行了表征。得到的红外光谱表明，三种比例的氧化铋纳米颗粒含有Bi-O- bi和Bi-O基团，表明其形成成功。XRD衍射图表明，合成的氧化铋纳米颗粒形成了α-Bi2O3晶相;α-/β- Bi2O3相的混合物，φ =1。SEM图像表明，氧化铋纳米颗粒形成鹅卵石形状，其比例依次为粒径增大的ϕ>1、ϕ=1和ϕ<1。UV-DRS结果表明，当ϕ=1、ϕ=1和ϕ>1时，氧化铋的能带能分别为2.76 eV、2.72 eV和2.78 eV。对三种氧化铋样品的光催化活性评价表明，φ =1的氧化铋在雷马唑黑B和甲基橙染料中的光催化活性最高，其速率常数分别为6.744 x 10-5 s-1和7.369 x 10-5 s-1。版权所有©2023作者，BCREC集团出版。这是一篇基于CC BY-SA许可(https://creativecommons.org/licenses/by-sa/4.0)的开放获取文章。

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引用次数: 0

Synthesis of CuO, ZnO and SnO2 Coupled TiO2 Photocatalyst Particles for Enhanced Photodegradation of Rhodamine B Dye CuO、ZnO和SnO2偶联TiO2光催化剂颗粒的合成及其对罗丹明B染料的光降解作用

Bulletin of Chemical Reaction Engineering & Catalysis

Pub Date : 2023-10-03 DOI: 10.9767/bcrec.19532

Amna Jwad Kadem, Zhuang Min Tan, Nanthini Mohana Suntharam, Swee-Yong Pung, Sivakumar Ramakrishnan

Environmental pollution is a global problem and dye pollution is one of the major factors. TiO2 shows promising photocatalytic properties that can degrade organic pollutants such as dye under ultraviolet (UV) irradiation. However, TiO2 possesses some disadvantages such as a wide band gap and a high recombination rate of electron-hole pairs. Coupling TiO2 with various metal oxides can enhance photocatalytic properties. In this work, photodepositon (reduction of metal ions on TiO2) followed by the thermal oxidation method were used for the coupling of TiO2 with CuO, ZnO, or SnO2 under various methanol concentrations (25 vol% or 50 vol%) and deposition duration (1 h or 3 h) to observe the effect of these parameters on the photocatalytic degradation activity on Rhodamine B (RhB) dye (up to 90 min). The rate constant of the photodegradation reaction (k) has improved from 0.0141 min−1 (uncoupled TiO2) to 0.0151~0.0368 min−1. Overall, CuO/TiO2 and SnO2/TiO2 samples have shown similar photocatalytic properties (average rate constants of 0.0341 min−1 and 0.0327 min-1, respectively), and both performed better than ZnO/TiO2 in terms of RhB photodegradation (average rate constants of 0.0197 min−1). The difference in photocatalytic performance can be explained by the bandgap of metal oxides and their relative band positions with TiO2. Lastly, CuO/TiO2 (50 vol%, 3 h) and SnO2/TiO2 (50 vol%, 3 h) have shown the best photocatalytic properties respectively due to a longer deposition time and higher concentration methanol, resulting in more deposited materials. Copyright © 2023 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

环境污染是一个全球性问题，染料污染是其中一个主要因素。TiO2具有良好的光催化性能，可以在紫外线照射下降解染料等有机污染物。然而，TiO2具有带隙宽、电子-空穴对复合率高等缺点。TiO2与多种金属氧化物偶联可以增强光催化性能。本文采用光沉积(将金属离子还原在TiO2上)和热氧化的方法，在不同的甲醇浓度(25 vol%或50 vol%)和沉积时间(1 h或3 h)下，将TiO2与CuO、ZnO或SnO2偶联，观察这些参数对罗丹明B (RhB)染料光催化降解活性(长达90 min)的影响。光降解反应速率常数(k)由0.0141 min−1(未偶联TiO2)提高到0.0151~0.0368 min−1。总体而言，CuO/TiO2和SnO2/TiO2样品具有相似的光催化性能(平均速率常数分别为0.0341 min−1和0.0327 min−1)，并且在RhB光降解方面均优于ZnO/TiO2(平均速率常数为0.0197 min−1)。这种光催化性能的差异可以用金属氧化物的带隙及其与TiO2的相对带位来解释。最后，CuO/TiO2 (50 vol%， 3 h)和SnO2/TiO2 (50 vol%， 3 h)由于沉积时间较长，甲醇浓度较高，沉积材料较多，分别表现出最佳的光催化性能。版权所有©2023作者，BCREC集团出版。这是一篇基于CC BY-SA许可(https://creativecommons.org/licenses/by-sa/4.0)的开放获取文章。

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引用次数: 1

An Experimental and Computational Study of Zeolitic Imidazole Framework (ZIF-8) Synthesis Modulated with Sodium Chloride and Its Interaction with CO2 氯化钠调合沸石咪唑骨架(ZIF-8)及其与CO2相互作用的实验与计算研究

Bulletin of Chemical Reaction Engineering & Catalysis

Pub Date : 2023-10-03 DOI: 10.9767/bcrec.20033

Lita Priandani, Amarilis Aliefa, Oka Pradipta Arjasa, Fajar Inggit Pambudi

The increase of CO2 level in atmosphere becomes one of the driving forces for research on functional materials. Capturing and utilizing of CO2 are more important than ever, both to reduce CO2 emission and to increase the economic value of CO2 derivatives. In this study, synthesis of metal-organic frameworks (MOFs) was conducted by combining Zn2+ metal nodes and 2-methylimidazolate ligand to form zeolitic imidazolate frameworks (ZIF-8) materials. ZIF-8 was synthesised with the addition of sodium chloride to modulate the crystal morphology during the in-situ synthesis, using either water or methanol as the solvent. According to the refinement of the X-ray diffraction pattern, the ZIF-8 materials were successfully prepared and have unit cell parameters that are reasonably close to the available standard. The formation of ZIF-8 is also confirmed by IR spectroscopy, which reveals the stretching vibration mode of Zn−N from the coordination between Zn2+ and 2-methylimidazolate ligand. The crystal morphology exhibits different shape, as observed in SEM and TEM studies, with the dominant shape being a rhombic dodecahedron. The interaction between ZIF-8 and CO2 was investigated via ex-situ IR spectroscopy, combined with several computational techniques such as density functional theory and molecular dynamics, to elucidate the nature of the CO2 binding sites. Copyright © 2023 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

大气中CO2浓度的升高成为功能材料研究的动力之一。无论是为了减少二氧化碳的排放，还是为了增加二氧化碳衍生物的经济价值，二氧化碳的捕获和利用比以往任何时候都更加重要。本研究将Zn2+金属节点与2-甲基咪唑酸配体结合，形成沸石型咪唑酸框架(ZIF-8)材料，合成了金属有机框架(MOFs)。ZIF-8在原位合成过程中加入氯化钠来调节晶体形态，使用水或甲醇作为溶剂。根据x射线衍射图的细化，成功制备了ZIF-8材料，其单位胞参数与现有标准相当接近。红外光谱也证实了ZIF-8的形成，通过Zn2+与2-甲基咪唑酸配体的配位揭示了Zn−N的伸缩振动模式。通过扫描电镜和透射电镜观察，晶体形态呈现出不同的形状，主要形状为菱形十二面体。利用红外光谱技术，结合密度泛函理论和分子动力学等计算技术，研究了ZIF-8与CO2的相互作用，以阐明CO2结合位点的性质。版权所有©2023作者，BCREC集团出版。这是一篇基于CC BY-SA许可(https://creativecommons.org/licenses/by-sa/4.0)的开放获取文章。

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引用次数: 0

Theoretical Study of Methane Dissociation on Pt(111) Surface Using Density Functional Theory (DFT) Calculations 用密度泛函理论(DFT)计算Pt(111)表面甲烷解离的理论研究

Bulletin of Chemical Reaction Engineering & Catalysis

Pub Date : 2023-09-30 DOI: 10.9767/bcrec.19788

Zahraa Al-Auda, Keith L. Hohn

In this work, methane (CH4) dissociation on Pt(111) surface dissociation was studied based on density functional theory (DFT) calculations to evaluate the nature of adsorption and to calculate the rate constant. The most stable configurations for H and CH3 were tested on the surface of Pt(111), and the results displayed that H tends to be adsorbed at the fcc site while CH3 tends to be adsorbed at the top site. The energy of barrier and rate constant of reaction were calculated and found to be (2.28 eV) and (3.21007E−08 s−1) respectively. In addition, the adsorption energy for the reactant and products to investigate the nature of adsorption of the reactant and products on Pt(111) surface either physisorption or chemisorption. The results showed that the kind of adsorption of CH4 adsorbed on the surface of Pt(111) at top site is physisorption, while CH3 and H species adsorption on the Pt(111) surface is chemisorption. Copyright © 2023 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

本文采用密度泛函理论(DFT)计算方法，研究了甲烷(CH4)在Pt(111)表面的解离，评价了吸附性质并计算了速率常数。在Pt(111)表面测试了H和CH3最稳定的构型，结果表明H倾向于在fcc位点吸附，而CH3倾向于在顶部位点吸附。计算得到势垒能为2.28 eV，反应速率常数为3.21007E−08 s−1。此外，对反应物和产物的吸附能进行了研究，考察了反应物和产物在Pt(111)表面的吸附性质是物理吸附还是化学吸附。结果表明:CH4吸附在Pt(111)表面的吸附方式为物理吸附，而CH3和H在Pt(111)表面的吸附方式为化学吸附。版权所有©2023作者，BCREC集团出版。这是一篇基于CC BY-SA许可(https://creativecommons.org/licenses/by-sa/4.0)的开放获取文章。

引用次数: 0

Carbon Microspheres with Cr(VI) Adsorption Performance were Prepared by In-situ Hydrothermal Carbonization Method 采用原位水热炭化法制备了具有Cr(VI)吸附性能的碳微球

Bulletin of Chemical Reaction Engineering & Catalysis

Pub Date : 2023-09-30 DOI: 10.9767/bcrec.20026

Shaojie Chen, Xinzhuo Wu, Mei Li, Yuhan Xu, Zihao Yuan, Zhao Li, Jing Li

Biochar material is a renewable adsorbent widely used for treating contaminated wastewater. The hydrothermal carbon (HTC) were prepared from low polymeric sugars and low concentration glucose under hydrothermal carbonization reactions without using dispersants. The composition and structure of the biochar produced were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), Raman spectroscopy (Raman), and N2 adsorption-desorption, indicating that amorphous graphitic carbon was obtained. Experimental results from the static adsorption of Cr(VI)-contaminated wastewater showed that HTCP-2 exhibited the highest adsorption capacity for Cr(VI), with a maximum adsorption capacity of 22.62 mg.g−1.The adsorption Cr(VI), MB, and RhB by the synthesized biochar all conformed to the pseudo-second-order kinetic model and Freundlich isotherm, suggesting a multilayer chemical adsorption process. Additionally, the synthesized HTC surface is enriched with a significant amount of oxygen-rich functional groups, which also has good adsorption performance for cationic dyes. Furthermore, the test results of fluorescence, photocurrent, and impedance indicate that HTCP-2 possesses the ability to generate and separate photoinduced charge carriers. This implied that HTCP-2 can be used for the preparation of adsorption photocatalysts, which effectively remove environmental pollutants through the synergistic effect of adsorption-photocatalysis. This study provides a research foundation for advancing water treatment technologies. Copyright © 2023 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

生物炭材料是一种可再生吸附剂，广泛用于污水处理。以低聚糖和低浓度葡萄糖为原料，在不使用分散剂的情况下，通过水热炭化反应制备了水热炭。利用x射线衍射(XRD)、傅里叶变换红外光谱(FTIR)、扫描电镜(SEM)、拉曼光谱(Raman)和N2吸附-脱附等手段对所制生物炭的组成和结构进行了表征，表明所制得的是无定形石墨碳。对Cr(VI)污染废水的静态吸附实验结果表明，HTCP-2对Cr(VI)的吸附量最高，最大吸附量为22.62 mg.g−1。合成的生物炭对Cr(VI)、MB和RhB的吸附均符合拟二级动力学模型和Freundlich等温线，为多层化学吸附过程。此外，合成的HTC表面富含大量富氧官能团，对阳离子染料也具有良好的吸附性能。荧光、光电流和阻抗测试结果表明，HTCP-2具有产生和分离光诱导载流子的能力。这表明HTCP-2可用于制备吸附光催化剂，通过吸附-光催化的协同作用，有效去除环境污染物。本研究为水处理技术的发展提供了研究基础。版权所有©2023作者，BCREC集团出版。这是一篇基于CC BY-SA许可(https://creativecommons.org/licenses/by-sa/4.0)的开放获取文章。

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引用次数: 0

Advancements in the Exploration of Gel Electrolytes for Aqueous Zinc Ion Batteries 锌离子电池凝胶电解质的研究进展

Bulletin of Chemical Reaction Engineering & Catalysis

Pub Date : 2023-09-21 DOI: 10.9767/bcrec.19816

Yi Xiong, Jinhang Dai, Lingyao Kuang, Xiaodan Li, Xingxing Gu

Aqueous zinc-ion batteries (ZIBs) are seen as a superior substitute for lithium-ion batteries (LIBs) due to their excellent safety, low cost, and eco-friendliness. However, problems such as zinc dendrite growth, hydrogen evolution reaction and electrode corrosion hinder the commercialization of batteries. Electrolyte as a link to other parts of the battery, has been widely concerned. Hydrogel is a kind of cross-linked product filled with water, which has the advantages of high theoretical capacity, good flexibility, good water retention and good mechanical properties, and becomes a potential candidate for ZIBs. By summarizing the development of hydrogel electrolytes, the cross-linking types of gel electrolytes and their applications in ZIBs were reviewed in this paper. Finally, the application of gel electrolyte in ZIBs is summarized and prospected, which brings a meaningful reference for the development of ZIBs. Copyright © 2023 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

水性锌离子电池(zib)因其优异的安全性、低成本和生态友好性被视为锂离子电池(LIBs)的优良替代品。然而，锌枝晶生长、析氢反应和电极腐蚀等问题阻碍了电池的商业化。电解液作为连接电池其他部分的纽带，一直受到广泛关注。水凝胶是一种充满水的交联产物，具有理论容量高、柔韧性好、保水性好、力学性能好等优点，成为ZIBs的潜在候选材料。综述了水凝胶电解质的研究进展，综述了交联凝胶电解质的种类及其在ZIBs中的应用。最后对凝胶电解质在ZIBs中的应用进行了总结和展望，为ZIBs的发展提供了有意义的参考。版权所有©2023作者，BCREC集团出版。这是一篇基于CC BY-SA许可(https://creativecommons.org/licenses/by-sa/4.0)的开放获取文章。

引用次数: 0

Biochar-Modified Layered Double Hydroxide for Highly Efficient on Phenol Adsorption 生物炭改性层状双氢氧化物对苯酚的高效吸附

Bulletin of Chemical Reaction Engineering & Catalysis

Pub Date : 2023-09-21 DOI: 10.9767/bcrec.19898

Amri Amri, Rezonsi Rezonsi, Nur Ahmad, Tarmizi Taher, Neza Rahayu Palapa, Risfidian Mohadi, Aldes Lesbani

All activities require drinking water. The existence of waste makes water unfit for consumption. Phenol waste is one example of waste that is often found. The toxic and corrosive nature of phenol is very dangerous for life, so its presence must be considered. The adsorption process was carried out using NiAl and ZnAl layered double hydroxides composites with biochar to eliminate the presence of phenol waste The adsorption process was carried out using NiAl and ZnAl layered double hydroxydes materials which were composited with biochar to eliminate the presence of phenol waste. NiAl-Biochar and ZnAl-Biochar composites were successfully prepared, as determined by XRD, FTIR, SEM, and BET analyses. NiAl layered double hydroxide surface area grew from 92.683 to 438.942 m2/g while ZnAl layered double hydroxide surface area increased from 9.621 to 58.461 m2/g. pHpzc of material is between 5.1 and 9.4. Optimal pH of NiAl and ZnAl layered double hydroxide is 3, optimum pH of NiAl-Biochar and ZnAl-Biochar is 5, and optimum pH of Biochar is 7. All kinetic and isotherm models for all materials were pseudo-second-order and Freundlich, respectively. NiAl-Biochar and ZnAl-Biochar have maximal adsorption capacities of 74.62 mg/g and 52.91 mg/g, respectively. The material's reusability indicates that NiAl-Biochar has superior qualities and may be reused for up to five cycles, followed by ZnAl-Biochar, NiAl layered double hydroxide, ZnAl layered double hydroxide, and Biochar. Copyright © 2023 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

所有活动都需要饮用水。废物的存在使水不适于饮用。苯酚废料就是经常发现的一种废料。苯酚的毒性和腐蚀性对生命是非常危险的，所以必须考虑它的存在。采用NiAl和ZnAl层状双羟基复合材料与生物炭进行吸附去除苯酚废物，采用NiAl和ZnAl层状双羟基材料与生物炭复合进行吸附去除苯酚废物。通过XRD、FTIR、SEM和BET分析，成功制备了nial -生物炭和znal -生物炭复合材料。NiAl层状双氢氧化物比表面积从92.683增加到438.942 m2/g, ZnAl层状双氢氧化物比表面积从9.621增加到58.461 m2/g。材料的pHpzc在5.1 - 9.4之间。NiAl和ZnAl层状双氢氧化物的最佳pH为3,NiAl-生物炭和ZnAl-生物炭的最佳pH为5，生物炭的最佳pH为7。所有材料的动力学和等温线模型分别为伪二阶和Freundlich模型。NiAl-Biochar和ZnAl-Biochar的最大吸附量分别为74.62 mg/g和52.91 mg/g。材料的可重复使用性表明，NiAl-Biochar具有优异的质量，可重复使用多达5个循环，其次是ZnAl-Biochar、NiAl层状双氢氧化物、ZnAl层状双氢氧化物和生物炭。版权所有©2023作者，BCREC集团出版。这是一篇基于CC BY-SA许可(https://creativecommons.org/licenses/by-sa/4.0)的开放获取文章。

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引用次数: 0

Organic Wastewater Treatment using Two-dimensional Graphene-based Photocatalysts: A Review 二维石墨烯基光催化剂处理有机废水的研究进展

Bulletin of Chemical Reaction Engineering & Catalysis

Pub Date : 2023-09-18 DOI: 10.9767/bcrec.20029

Kelvert Kong, Zhiying Zhu, Mukhamad Nurhadi, Sumari Sumari, Siew Fan Wong, Sin Yuan Lai

Photocatalysts have gained enormous attention in water decontamination due to their economic viable and intriguing properties. Recently, graphene-based semiconductors have become the sparkling star on the horizon of material science. The coupling of two-dimensional graphene and its derivatives (graphene oxide and reduced graphene oxide) with semiconductors could effectively enhance the efficiency in organic wastewater degradation under light irradiation. Hence, a collective study on this topic is necessary. Four types of graphene-based semiconductors, viz. titania, zinc oxide, cadmium sulfide, and bismuth oxychloride, are explored. Besides, synthesis approaches and properties of these photocatalysts are elucidated too. We hope this review could enable us to rationally design and harness the morphology, structure and electronic properties of these advanced materials. Copyright © 2023 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

光催化剂以其经济可行和令人感兴趣的特性在水净化中得到了广泛的关注。近年来，石墨烯基半导体成为材料科学领域的一颗闪亮的明星。二维石墨烯及其衍生物(氧化石墨烯和还原氧化石墨烯)与半导体的耦合可以有效地提高光照射下有机废水的降解效率。因此，有必要对这一主题进行集体研究。四种类型的石墨烯基半导体，即二氧化钛，氧化锌，硫化镉和氯化铋，进行了探索。此外，还介绍了这些光催化剂的合成方法和性能。我们希望这一综述能够使我们合理地设计和利用这些先进材料的形态、结构和电子性能。版权所有©2023作者，BCREC集团出版。这是一篇基于CC BY-SA许可(https://creativecommons.org/licenses/by-sa/4.0)的开放获取文章。

引用次数: 0

Effect of Particle Size of Rice-Husk Derived Silica on the Pyrolysis of Pomelo Peels 稻壳衍生二氧化硅粒度对柚子皮热解的影响

Bulletin of Chemical Reaction Engineering & Catalysis

Pub Date : 2023-09-13 DOI: 10.9767/bcrec.19801

Karakate Bo-ongcharoenlab, Iyarin Tongdang, Worapon Kiatkittipong, Adisak Jaturapiree, Kanjarat Sukrat, Thanunya Saowapark, Ekrachan Chaichana

Silica with two different sizes i.e. microsilica (MS) and nanosilica (NS) was used as a catalytic support for vanadium (5-15 wt%) in the pyrolysis of pomelo peels. Besides use of pomelo peels (agricultural residues) as a feedstock for the pyrolysis, to contribute to environmental sustainability, rice husk was used as a silica source for obtaining the silica support. From the result, it was found that non-catalytic pyrolysis of pomelo peels gave a bio-oil yield of 33.3 wt%. The catalytic pyrolysis with vanadium-modified silica decreased the bio-oil yields ranging between 27.2-33.1 wt%. This was due to the occurrence of the second reactions generated from the active sites on the catalysts, which leads to the conversion of bio-oil into gas products. For NS catalyst, increasing the amount of vanadium loading directly decreased the bio-oil yields and increased the gas yield. The variation of product phase distribution was not clearly observed for MS catalyst even with various vanadium loadings. In addition, NS catalyst exhibited higher efficiency in reducing the acid content in the bio-oil, and increasing the phenol content. The distinguished properties of the nanoparticles may be the main reason for these phenomena. Copyright © 2023 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

采用微二氧化硅(MS)和纳米二氧化硅(NS)两种不同粒径的二氧化硅作为钒(5-15 wt%)的催化载体进行柚皮热解。除了使用柚子皮(农业残留物)作为热解的原料外，为了促进环境的可持续性，稻壳被用作二氧化硅源以获得二氧化硅载体。结果表明，柚皮非催化热解的生物油收率为33.3%。钒改性二氧化硅催化热解可使生物油收率降低27.2 ~ 33.1%。这是由于催化剂活性位点发生了二次反应，导致生物油转化为气体产品。对于NS催化剂，钒负载量的增加直接降低了生物油收率，提高了生物气收率。在不同的钒负载下，产物相分布的变化也不明显。此外，NS催化剂在降低生物油中的酸含量和提高酚含量方面表现出较高的效率。纳米颗粒的独特性质可能是造成这些现象的主要原因。版权所有©2023作者，BCREC集团出版。这是一篇基于CC BY-SA许可(https://creativecommons.org/licenses/by-sa/4.0)的开放获取文章。

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引用次数: 0

One Pot Synthesis of Calcium Sulfate Hemihydrate from Fishbone-derived Carbon 鱼骨碳一锅法合成半水硫酸钙

Bulletin of Chemical Reaction Engineering & Catalysis

Pub Date : 2023-09-04 DOI: 10.9767/bcrec.19515

Teguh Wirawan, Mukhamad Nurhadi, Agung Rahmadani, Yuniar Ponco Prananto, Zhiying Zhu, Sin Yuan Lai, Hadi Nur

Calcium Sulfate Hemihydrate (CSH) with uniform morphology and high crystallinity were successfully prepared by a precipitation-hydrolysis method in a concentrated sulfuric acid solution containing fishbone-derived carbon. The CSH was produced by carbonization of fishbone powder at 500 °C for 2 h, followed by sulfonation with concentrated sulfuric acid for 3 h. The solid mixture was washed until the pH of 2, then left at room temperature for 3 days. Physical properties of synthesized CSH were characterized using Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), wavelength dispersive X-ray fluorescence (WDXRF), Scanning Electron Microscope (SEM), nitrogen adsorption-desorption isotherm, and melting point test. It is concluded that the CSH were formed due to hydrolysis of fishbone-derived carbon in a moderately concentrated sulfuric acid solution of carbon-derived fishbone and crystallization into a fibrous octa calcium phosphate (OCP) form. In this research, effect of crystal growth time, effect of pH during the crystal growth, and effect of volume of the solution were also investigated. Copyright © 2023 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

在含鱼骨源碳的浓硫酸溶液中，采用沉淀-水解法制备了形貌均匀、结晶度高的半水合硫酸钙(CSH)。鱼骨粉在500℃下碳化2h，浓硫酸磺化3h，固相混合物洗涤至pH = 2，室温静置3d。采用傅里叶变换红外光谱(FTIR)、x射线衍射(XRD)、波长色散x射线荧光(WDXRF)、扫描电镜(SEM)、氮气吸附-解吸等温线和熔点测试对合成的碳水化合物的物理性质进行了表征。结论是鱼骨源碳在中等浓度的碳源鱼骨硫酸溶液中水解结晶成纤维状八羧酸磷酸钙(OCP)。在本研究中，还考察了晶体生长时间、生长过程中pH值的影响以及溶液体积的影响。版权所有©2023作者，BCREC集团出版。这是一篇基于CC BY-SA许可(https://creativecommons.org/licenses/by-sa/4.0)的开放获取文章。

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引用次数: 0