Journal of Saudi Chemical Society最新文献

{"title":"Fabricating 3D hierarchical hollow CoAl-LDHs@CoSx-rGO ball-flower for degrading sulfamethoxazole via visible-light coupling PMS activation: Performance and mechanism insight","authors":"Tao Wu ,&nbsp;Wanyue Wang ,&nbsp;Jiacheng Huang ,&nbsp;Xin Ren ,&nbsp;Xuesong Zhao ,&nbsp;Tianyu Zhou","doi":"10.1016/j.jscs.2024.101940","DOIUrl":"10.1016/j.jscs.2024.101940","url":null,"abstract":"<div><p>Sulfamethoxazole (SMX) is an extensively applied antibacterial drug, and it is also a pollutant that poses a serious threat to human and ecosystem health. In this research, a 3D hierarchical hollow ball-flower structure catalyst (CoAl-LDHs@CoS_x-rGO) was tailored for the first time to efficiently degrade SMX via visible light coupling PMS activation. A series of characterizations confirm that the target catalyst is successfully prepared and the optimized 0.1CoAl-LDHs@CoS_x-rGO sample possesses superior specific surface area of 306.0 m²/g, and significantly higher photocurrent response and lower electrochemical impedance. More importantly, 0.5 g/L of the sample can degrade 98.59 % of SMX within 50 min via visible light coupling PMS activation, and after 7 degradation cycles, the degradation rate only decreased by 8.49 %. A series of parameters that affect degradation rate have been optimized in detail. Capture experiments and ESR indicate that e⁻, •OH and SO₄^•− make major contributions to degradation, and visible light coupling PMS activation generates stronger signals than alone visible-light or PMS system. LC-MS, TEST toxicity assessment and theoretical calculation were conducted to elucidate degradation route and intermediate toxicity. The research provides a new approach to design catalysts with highly exposed activity sites for efficiently removing SMX from environmental water.</p></div>","PeriodicalId":16974,"journal":{"name":"Journal of Saudi Chemical Society","volume":"28 6","pages":"Article 101940"},"PeriodicalIF":5.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1319610324001352/pdfft?md5=469ab44a6f756711939d39388f5c6f01&pid=1-s2.0-S1319610324001352-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142232377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Discovery of tetrazole thioethers: An efficient, environmentally friendly and metal-free S-arylation using diaryliodonium salts","authors":"Xiaogang Li ,&nbsp;Xuesong Wang ,&nbsp;Yan Wang ,&nbsp;Yinfeng Tan ,&nbsp;Dong Liu ,&nbsp;Xueying Zhang ,&nbsp;Youbin Li ,&nbsp;Junyu Xu","doi":"10.1016/j.jscs.2024.101943","DOIUrl":"10.1016/j.jscs.2024.101943","url":null,"abstract":"<div><div>An efficient, environmentally friendly, and metal-free method for the synthesis of functionalized tetrazole thioethers via the S-arylation of tetrazole-5-thiones using diaryliodonium salts as aryl transfer reagents has been developed. This novel methodology provides rapid access to tetrazole thioether derivatives under facile conditions. Our study underscores the chemoselectivity of unsymmetrical diaryliodonium salts, emphasizing their preference for the transfer of sterically hindered and electron-deficient aryl groups. Notably, the synthesized compound <strong>3h</strong> exhibits antitumor activity against A2780 (ovarian cancer) and MDA-MB-231 (breast cancer) tumor cells. In silico studies predict these compounds to possess good drug-likeness and low toxicity risk. These findings highlight the potential of functionalized tetrazole thioethers as antiproliferative agents and pave the way for further development and optimization in future investigations.</div></div>","PeriodicalId":16974,"journal":{"name":"Journal of Saudi Chemical Society","volume":"28 6","pages":"Article 101943"},"PeriodicalIF":5.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pine sawdust immobilized zeolitic imidazolate framework-67 derived magnetic composites: An efficient and recycable adsorbent for norfloxacin removal","authors":"Yu Zheng ,&nbsp;Qing Shen ,&nbsp;Jie Gao ,&nbsp;Tian Liang ,&nbsp;Xiao-Bing Han ,&nbsp;Yuan Zhao ,&nbsp;Tao Chen","doi":"10.1016/j.jscs.2024.101939","DOIUrl":"10.1016/j.jscs.2024.101939","url":null,"abstract":"<div><p>Antibiotic contamination is a global environmental problem. The emerging contaminant norfloxacin (NOR) may increase the risk of drug resistance and thereby harm human health. The practical application of metal–organic framework crystals is usually limited by their powder form and difficulty in recovery. In this study, a magnetic Co-MPS-800 composite was prepared from carbonization with ZIF-67@pine sawdust, and significantly raised the NOR removing ability from wastewater. The changes in functional group composition, elemental contents, morphology, thermal stability and adsorption mechanism of the magnetic Co-MPS-800 composite were interpreted using FT-IR, XRD, SEM, BET, TGA and XPS. The Co-MPS-800 has an isoelectric point of 9.15 and a large specific surface area (174.58 m²·g⁻¹). The impacts of pH, contact time, temperature and dosage on the performance of Co-MPS-800 were also studied. The adsorption capacity over NOR reached 221.98 mg·g⁻¹ at 303 K, pH=6.0. The NOR adsorption is best suited a pseudo-2nd-order kinetic model and the Freundlich isotherm. Co-MPS-800 also had excellent reusability, and the removal rate reached 82.94 % after four repeated uses. Therefore, the magnetic Co-MPS-800 composite is effective in removing NOR from aqueous solutions. Altogether, this functional MOF-derived porous carbon may serve as a promising pollutant biosorbent, and its preparation strategy may provide insights for future studies.</p></div>","PeriodicalId":16974,"journal":{"name":"Journal of Saudi Chemical Society","volume":"28 6","pages":"Article 101939"},"PeriodicalIF":5.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1319610324001340/pdfft?md5=1707ff61c413333dede1f1e4a46b7817&pid=1-s2.0-S1319610324001340-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142233801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigating adsorption and removal of divalent Ca2+ and Pb2+ ions from aqueous solutions by gamma-irradiation using quartz tuning fork (QTF) sensor technique","authors":"Reem Alanazi ,&nbsp;Shofiur Rahman ,&nbsp;Mahmoud Al-Gawati ,&nbsp;Khalid E. Alzahrani ,&nbsp;Nahed Alarifi ,&nbsp;Nadyah Alanazi ,&nbsp;Abdullah N. Alodhayb","doi":"10.1016/j.jscs.2024.101947","DOIUrl":"10.1016/j.jscs.2024.101947","url":null,"abstract":"&lt;div&gt;&lt;div&gt;In this study, gold-coated quartz tuning forks (QTFs) sensing devices functionalized with self-assembled monolayers (SAM) of a lower-rim functionalized calix[4]arene methoxy ester were used for the detection of divalent Ca&lt;sup&gt;2+&lt;/sup&gt; and Pb&lt;sup&gt;2+&lt;/sup&gt; ions in aqueous solutions by utilizing adsorption behavior and the radiative effect. The gold-coated QTF functionalized calix[4]arene methoxy ester sensing device was tested by measuring the respective frequency shifts obtained using small (60 µL) samples of aqueous PbCl&lt;sub&gt;2&lt;/sub&gt; at two different concentrations (10&lt;sup&gt;−6&lt;/sup&gt; and 10&lt;sup&gt;−4&lt;/sup&gt; M). For 10&lt;sup&gt;−4&lt;/sup&gt; M solutions of PbCl&lt;sub&gt;2&lt;/sub&gt;, results showed that the resonance frequency shift Δf = 317 Hz, from 32,867 Hz (f&lt;sub&gt;Calix&lt;/sub&gt;) to 32,550 Hz (f&lt;sub&gt;Calix⊃Pb&lt;sup&gt;2+&lt;/sup&gt;&lt;/sub&gt;) due to the absorption of lead (Pb&lt;sup&gt;2+&lt;/sup&gt;) ions (10&lt;sup&gt;-4&lt;/sup&gt; M) by calixl[4]arene methoxy ester receptor molecules on the QTF sensing layer from the aqueous solution to forming the ([Calix ⊃ Pb&lt;sup&gt;2+&lt;/sup&gt;]) complex. The most significant frequency changes were observed at a concentration of 10&lt;sup&gt;−6&lt;/sup&gt; M CaCl&lt;sub&gt;2&lt;/sub&gt;, where CaCl&lt;sub&gt;2&lt;/sub&gt; exhibited the biggest change of 356 Hz, from 32,893 Hz (f&lt;sub&gt;Calix&lt;/sub&gt;) to 32,537 Hz (f&lt;sub&gt;Calix⊃Ca&lt;sup&gt;2+&lt;/sup&gt;&lt;/sub&gt;), compared to 317 Hz for PbCl&lt;sub&gt;2&lt;/sub&gt; (10&lt;sup&gt;−4&lt;/sup&gt; M). The limit of detection was 100 femtomolar (fM) for CaCl&lt;sub&gt;2&lt;/sub&gt; and 245 fM for PbCl&lt;sub&gt;2&lt;/sub&gt;. After that, we irradiated the receptor molecules which was holding Pb&lt;sup&gt;2+&lt;/sup&gt; ions in the complex ([calix ⊃ Pb&lt;sup&gt;2+&lt;/sup&gt;]) on the QTF sensing layer with a radiation dose ranging from 7.5 to 50 µGy of gamma rays from the Cesium-137 source for 30 min. Interestingly, it was observed that the resonance frequency shift (Δf = 54 Hz) back to 32,604 Hz from 32,550 Hz (f&lt;sub&gt;(Calix⊃Pb&lt;sup&gt;2+&lt;/sup&gt;)&lt;/sub&gt;), which strongly suggests that the Pb&lt;sup&gt;2+&lt;/sup&gt; ion removed from ([calix ⊃ Pb&lt;sup&gt;2+&lt;/sup&gt;]) complex on the QTF sensing layer due to gamma radiation dose. To follow up on the radiation effect of the ([calix ⊃ Pb&lt;sup&gt;2+&lt;/sup&gt;]) on the QTF sensing layer, we stopped the gamma radiation source and kept it for an additional 10 min to see if there was any resonance frequency. It was noticed that an additional resonance frequency shifted (Δf = 33 Hz) back to 32,637 Hz from 32,604 Hz after stopping the gamma radiation source for 10 min. We assume that the complex ([calix ⊃ Pb&lt;sup&gt;2+&lt;/sup&gt;]) absorbs the gamma radiation and continues the removal of Pb&lt;sup&gt;2+&lt;/sup&gt; ions from the complex on the sensing layer. A similar phenomenon was also observed for the absorption of lead (Pb&lt;sup&gt;2+&lt;/sup&gt;) ions (10&lt;sup&gt;-6&lt;/sup&gt; M) by calix[4]arene methoxy ester receptor molecules on the QTF sensing layer from the aqueous solution to forming the ([Calix ⊃ Pb&lt;sup&gt;2+&lt;/sup&gt;]) complex. The resonance frequency shift Δf = 142 Hz, from 32,706 Hz (f&lt;sub&gt;Calix&lt;/sub&gt;) to 32,564 Hz (f&lt;sub&gt;Calix⊃Pb&lt;sup&gt;2+&lt;/sup&gt;&lt;/sub&gt;) due to the absorption o","PeriodicalId":16974,"journal":{"name":"Journal of Saudi Chemical Society","volume":"28 6","pages":"Article 101947"},"PeriodicalIF":5.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recent advances in catalytic reduction of CO2 through bismuth based MOFs","authors":"Rabia Zafar ,&nbsp;Ayesha Javaid ,&nbsp;Muhammad Imran ,&nbsp;Shoomaila Latif ,&nbsp;Muhammad Naeem Khan ,&nbsp;Liviu Mitu ,&nbsp;Romică Crețu","doi":"10.1016/j.jscs.2024.101926","DOIUrl":"10.1016/j.jscs.2024.101926","url":null,"abstract":"<div><p>Bismuth based MOFs have appealed much curiosity in different catalytic processes due to their remarkable properties, which include their porous structure, less toxicity, abundance and high specific surface area. With their distributed active sites and constrained reaction regions, Bi based MOFs have a bright future as catalysts for extremely focused CO₂ reduction by electrocatalysis reactions (ECO₂RR). Formic acid (HCOOH), one of the byproducts of these processes, is notable because of its high economic worth. An extensive summary of Bi-MOFs and their derivatives used in ECO₂RR and the photocatalytic reduction of CO₂ into useful compounds is given in this review. Bi-MOFs synthesis methods for both electro and photocatalyst applications are discussed, along with an analysis of their unique benefits. Interestingly, a variety of Bi-MOFs and related offshoots are highlighted, including bimetallic catalysts and Bi-based MOF-derived nanocomposites. Bi-MOFs catalysts’ catalytic efficacy is demonstrated to be closely related to the MOF structure blocks-metal ions and organic linkers as well as particular circumstances controlling their derivatization. As a result, Bi-MOFs catalysts have a wide range of functions and provide the possibility of controlling the catalytic performance. This review describes the current obstacles in this area and makes recommendations for future research paths to advance the use of Bi-MOFs as electro- and photocatalysts.</p></div>","PeriodicalId":16974,"journal":{"name":"Journal of Saudi Chemical Society","volume":"28 6","pages":"Article 101926"},"PeriodicalIF":5.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1319610324001212/pdfft?md5=6d3def79aaf5d75ea2f9b5a22abcad07&pid=1-s2.0-S1319610324001212-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142157713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"UV-light-induced photocatalytic degradation of organic pesticides in agricultural soils with Fe2O3 and H2O2","authors":"Amal BaQais ,&nbsp;Mohamed H. El-Saeid ,&nbsp;Mashael Alshabanat","doi":"10.1016/j.jscs.2024.101953","DOIUrl":"10.1016/j.jscs.2024.101953","url":null,"abstract":"<div><div>Organic pesticides pose significant concerns as primary sources of soil contamination in agricultural areas, and their potential to bioaccumulate in humans through the consumption of contaminated crops adds to the urgency of addressing this issue. This study looks at 18 different types of pesticides found in natural soil samples from farming areas. The pesticides are divided into four groups: organochlorines (OCP), organophosphorus (OPP), carbamates (Carb), and pyrethroids (Pyrth). The study investigates how the five most common pesticides (Atrazine, Chlorpyrifos methyl, Dimethoate, Heptachlor, and Methomyl) degrade when exposed to UV radiation at a wavelength of 306 nm, with or without 0.5 % Fe₂O₃ and 0.5 % H₂O₂ photocatalysts. The results demonstrate complete photolysis of all pesticides over irradiation periods ranging from 26 to 96 h under UV radiation. It is notable that by incorporating Fe₂O₃ and H₂O₂, the degradation of pesticides was enhanced significantly compared to photolysis alone, achieving complete photocatalytic degradation within 8–11 h of irradiation. It is worth mentioning that Fe₂O₃ + H₂O₂ exhibits superior photocatalytic efficiency compared to Fe₂O₃. Furthermore, the highly toxic and persistent organochlorine heptachlor was successfully degraded in soil within 5 h using the Fe₂O₃ + H₂O₂ photocatalyst. The research provides a comprehensive understanding of the intricate mechanisms underlying the photocatalytic deterioration of these pesticides. This study offers valuable insights for designing effective UV-light-driven photocatalysts for environmental remediation.</div></div>","PeriodicalId":16974,"journal":{"name":"Journal of Saudi Chemical Society","volume":"28 6","pages":"Article 101953"},"PeriodicalIF":5.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142748643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Continuous processing of JP-10 production: Hydroisomerization of endo-tetrahydrodicyclopentadiene to exo-tetrahydrodicyclopentadiene using a novel bimetal catalyst of Ba/Se supported on TiO2/SO4","authors":"P. Jayapradha ,&nbsp;P. Tamizhdurai ,&nbsp;C. Kavitha ,&nbsp;V.L. Mangesh ,&nbsp;Ashma Abubakker ,&nbsp;S. Jayakumar ,&nbsp;P. Saravanan ,&nbsp;Krishna Kumar Yadav ,&nbsp;Maha Awjan Alreshidi ,&nbsp;Sultan Alshehery ,&nbsp;Haifa A. Alqhtani ,&nbsp;May Bin-Jumah","doi":"10.1016/j.jscs.2024.101951","DOIUrl":"10.1016/j.jscs.2024.101951","url":null,"abstract":"<div><div>High-energy-density liquid fuels can be utilized as an energetic supplement to conventional fuels and are essential for volume-limited aerospace vehicles to boost payload and flying range. JP-10 has attracted much attention because of its high density, flash point, high volumetric heat, and low freezing point. Here we report the hydroisomerization of <em>endo</em>-tetrahydrodicyclopentadiene to <em>exo</em>-tetrahydrodicyclopentadiene (the main component of JP-10) was investigated over the TiO₂/SO₄ supported Ba(10 %)/Se(5–20 %) catalysts. This work aims to examine changes in continuous processing settings to maximize <em>exo</em>-THDCPD production, selectivity, and conversion. It was discovered that the synthesized TiO₂/SO₄/Ba(10 %)/Se(5–20 %) heterogeneous catalysts were novel, more effective, affordable, environmentally friendly, and simple to produce. The catalyst’s physicochemical characteristics were examined using FT-IR, BET, XRD, HR-SEM, HR-TEM, TGA and NH₃-TPD. The produced TiO₂/SO₄/Ba(10 %)/Se(5–20 %) nano-catalysts have good catalytic activity and a wide range of active Lewis and Brønsted acid sites. Evaluation of the isomerization of <em>endo</em>-THDCPD to <em>exo</em>-THDCPD was conducted in a high-pressure fixed-bed continuous reactor operating at 200 °C, 20 bar of pressure, and 4.0mol/h of H₂ flow rate. According to the investigations, the synthesized catalyst with a 15 % Se load performs exceptionally well, exhibiting 100 % conversion, 98.5 % selectivity, and 98.5 % yield at an H₂ flow rate of 10 ml/min. The isomerized product is used in Jet Propellant-10, a high-density fuel. Under ideal circumstances, <em>exo</em>-THDCPD with a high degree of purity (&gt;98 wt%) was produced without the need for any sort of separation technique.</div></div>","PeriodicalId":16974,"journal":{"name":"Journal of Saudi Chemical Society","volume":"28 6","pages":"Article 101951"},"PeriodicalIF":5.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Anticancer and antibacterial potential of green synthesized BSA conjugated silver nanoparticles","authors":"S. Akhtar ,&nbsp;R. AlAnsari ,&nbsp;B. Hasan ,&nbsp;S. Hasan ,&nbsp;A. Zayer ,&nbsp;J. AlHaddad ,&nbsp;M.A. Ansari ,&nbsp;F.A. Khan ,&nbsp;A. Ul-Hamid ,&nbsp;F.Z. Henari ,&nbsp;G. Roshan Deen","doi":"10.1016/j.jscs.2024.101917","DOIUrl":"10.1016/j.jscs.2024.101917","url":null,"abstract":"<div><p>In this study, silver nanoparticles (AgNPs) were synthesized by utilizing different volumes of silver nitrate (AgNO₃) and a medicinally important protein, bovine serum albumin (BSA); subsequently, their anticancer and antibacterial activities were investigated. The volume of AgNO₃ and BSA were varied to obtain physically and chemically stable NPs for better therapeutic effects. The synthesized BSA@AgNPs were characterized by spectroscopic and microscopic methods, such as FTIR, and UV–Vis spectroscopy, SEM/EDS, and TEM/SAED. The characterization results offer substantial proof for the successful preparation of non-aggregated stable BSA@AgNPs. The EDS analysis revealed the presence of Ag, C, and O, thus reaffirming the preparation of BSA-conjugated AgNPs. The anticancer efficacy of BSA@AgNPs was studied against colorectal (HCT-116) and HeLa cancerous cell lines. The anticancer results showed that the treatment of cancer cells with BSA@AgNPs decreased the number of cells compared with untreated cells. The NPs prepared with a moderate amount of BSA showed a better inhibiting property than the particles prepared with a high amount of BSA. The antibacterial activity of BSA@AgNPs was studied against gram-positive (<em>S. aureus</em>) and gram-negative (<em>E. coli</em>) bacteria. SEM and TEM analyses confirmed that S. aureus and <em>E. coli</em> cells were damaged upon exposure to BSA@AgNPs in the form of deep pits and cavities as opposed to untreated cells. The obtained results show that the green synthesized BSA@AgNPs could be used as potential anticancer and antibacterial drugs.</p></div>","PeriodicalId":16974,"journal":{"name":"Journal of Saudi Chemical Society","volume":"28 5","pages":"Article 101917"},"PeriodicalIF":5.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1319610324001121/pdfft?md5=58c35d094e4f52179eb9dd67dbcdee96&pid=1-s2.0-S1319610324001121-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142006390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nitric acid dissolution of germanium overlay in hard zinc slag to enhance germanium leaching and optimization of response surface methodology","authors":"Jie Lan,&nbsp;Ming Liang,&nbsp;Kun Yang,&nbsp;Kun Zhu","doi":"10.1016/j.jscs.2024.101925","DOIUrl":"10.1016/j.jscs.2024.101925","url":null,"abstract":"<div><p>With the rapid development of global digital economy and aerospace, the gap between the supply and demand of germanium is expanding, and the establishment of a new process for the deep leaching of germanium from hard zinc slag is imminent. In this paper, on the basis of analyzing the reasons for the low germanium leaching rate from hard zinc slag, a new process of germanium leaching enhanced by HNO₃ dissolution of externally wrapped ZnFe₂O₄ is established, and response surface optimization is carried out. The PbggGe₄O₇ phase in hard zinc slag is externally wrapped with ZnFe₂O₄ phase, and the non-reaction between ZnFe₂O₄ and hydrochloric acid is the main reason for the low leaching rate of germanium from hard zinc slag, so it is necessary to add HNO₃ to dissolve the external ZnFe₂O₄ in leaching, and then use hydrochloric acid to leach the PbGe₄O₇ containing germanium in the interior. The potential pH diagram of the Pb-Ge-Cl-H₂O system was also plotted, indicating that increasing the concentration of chloride ions during hydrochloric acid leaching contributes to the generation of GeCl₄ at low acidity. When the hydrochloric acid concentration was 134.65 g/L, the liquid–solid ratio was 6, the theoretical dosage of HNO₃ was 0.3, and the leaching time was 236 min, the optimum leaching rate of germanium was 93.72%, which was 23.72% higher than that of germanium leaching from hard zinc slag.</p></div>","PeriodicalId":16974,"journal":{"name":"Journal of Saudi Chemical Society","volume":"28 5","pages":"Article 101925"},"PeriodicalIF":5.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1319610324001200/pdfft?md5=eac238989625f6ba81d986f05853a846&pid=1-s2.0-S1319610324001200-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142130028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modification of nickel foam with nickel phosphate catalyst layer via anodizing for boosting the electrocatalytic urea oxidation and hydrogen evolution reactions","authors":"Mohamed A. Ghanem,&nbsp;Abdullah M. Al-Mayouf,&nbsp;Mohamed O. Abdulkader,&nbsp;Khalaf A. Alfudhayli","doi":"10.1016/j.jscs.2024.101913","DOIUrl":"10.1016/j.jscs.2024.101913","url":null,"abstract":"<div><p>Urea oxidation reaction (UOR) and hydrogen evolution reaction (HER) are the key processes for implementing urinated water electrolysis and hydrogen green production, respectively. This contribution investigates the modification of commercial nickel foam (NF) with a nickel phosphate (NiPO/NF) heterostructure layer via anodizing in phosphate solution at various potentials (5, 10 and 15 V) as a simple and efficient route to boost the urea-assisted water electrolysis and hydrogen production in alkaline medium. The morphology and composition physicochemical characterisation of the phosphate layer exhibit aggregates of crystalline nanoparticles with interstitial mesoporous and macroporous networks with a mole composition ratio of 9.42: 1.0: 8.14 for Ni: P: O respectively. The electrochemical measurements revealed the NiPO/NF anodized at 10 V exhibits a superior electroactive surface area of 255 cm², a substantially higher urea oxidation current compared to pristine NF, achieving 20 and 500 mA/cm² at 1.35 and 1.6 V vs. RHE respectively and retained 100 % of activity during the urea electrolysis for more than 3 h. The electrochemical impedance analysis confirmed the alkaline urea oxidation reaction proceeded via indirect (EC) and direct mechanism and the CO₂ intermediates adsorption–desorption became the predominant reaction at more positive potential. The NiPO/NF anode employed in an H-shape can deliver up to ±400 mA/cm² for UOR/HER at a bias potential of 1.85 V and 8-fold (2.0 mmol/min) much higher hydrogen production rate compared to the pristine NF anode (0.25 mmol/min). Combining commercial nickel foam modification via anodizing and alkaline urea electrolysis at ambient conditions offers a unique and innovative solution for both large-scale hydrogen green production as well as remedy of the urinated wastewater for a more sustainable future.</p></div>","PeriodicalId":16974,"journal":{"name":"Journal of Saudi Chemical Society","volume":"28 5","pages":"Article 101913"},"PeriodicalIF":5.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S131961032400108X/pdfft?md5=1bd07d969e0bdd8d9088be4f4a1c555e&pid=1-s2.0-S131961032400108X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141881312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}