Global Challenges最新文献_第7页

Masthead: (Global Challenges 1/2024) 刊头：（《全球挑战》1/2024）

IF 4.9 4区综合性期刊

Global Challenges Pub Date : 2024-01-11 DOI: 10.1002/gch2.202470077

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(Global Challenges 1/2024) (全球挑战 1/2024）

IF 4.9 4区综合性期刊

Global Challenges Pub Date : 2024-01-11 DOI: 10.1002/gch2.202470075

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Advances and Applications of Metal-Organic Frameworks (MOFs) in Emerging Technologies: A Comprehensive Review 金属有机框架 (MOF) 在新兴技术中的进展与应用：全面回顾

IF 4.9 4区综合性期刊

Global Challenges Pub Date : 2023-12-30 DOI: 10.1002/gch2.202300244

Dongxiao Li, Anurag Yadav, Hong Zhou, Kaustav Roy, Pounraj Thanasekaran, Chengkuo Lee

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Mitigating Global Challenges: Harnessing Green Synthesized Nanomaterials for Sustainable Crop Production Systems 缓解全球挑战：将绿色合成纳米材料用于可持续作物生产系统

IF 4.9 4区综合性期刊

Global Challenges Pub Date : 2023-12-25 DOI: 10.1002/gch2.202300187

Niranjana Sundararajan, Heena Shabnam Habeebsheriff, Karthikkumar Dhanabalan, Vo Huu Cong, Ling Shing Wong, Ranjithkumar Rajamani, Bablu Kumar Dhar

{"title":"Mitigating Global Challenges: Harnessing Green Synthesized Nanomaterials for Sustainable Crop Production Systems","authors":"Niranjana Sundararajan, Heena Shabnam Habeebsheriff, Karthikkumar Dhanabalan, Vo Huu Cong, Ling Shing Wong, Ranjithkumar Rajamani, Bablu Kumar Dhar","doi":"10.1002/gch2.202300187","DOIUrl":"10.1002/gch2.202300187","url":null,"abstract":"Green nanotechnology, an emerging field, offers economic and social benefits while minimizing environmental impact. Nanoparticles, pivotal in medicine, pharmaceuticals, and agriculture, are now sourced from green plants and microorganisms, overcoming limitations of chemically synthesized ones. In agriculture, these green-made nanoparticles find use in fertilizers, insecticides, pesticides, and fungicides. Nanofertilizers curtail mineral losses, bolster yields, and foster agricultural progress. Their biological production, preferred for environmental friendliness and high purity, is cost-effective and efficient. Biosensors aid early disease detection, ensuring food security and sustainable farming by reducing excessive pesticide use. This eco-friendly approach harnesses natural phytochemicals to boost crop productivity. This review highlights recent strides in green nanotechnology, showcasing how green-synthesized nanomaterials elevate crop quality, combat plant pathogens, and manage diseases and stress. These advancements pave the way for sustainable crop production systems in the future.","PeriodicalId":12646,"journal":{"name":"Global Challenges","volume":"8 1","pages":""},"PeriodicalIF":4.9,"publicationDate":"2023-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/gch2.202300187","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139036423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Advances in Nanohybrid Membranes for Dye Reduction: A Comprehensive Review 用于染料还原的纳米杂化膜的研究进展：全面回顾

IF 4.9 4区综合性期刊

Global Challenges Pub Date : 2023-12-21 DOI: 10.1002/gch2.202300052

Mahsa Taheri

{"title":"Advances in Nanohybrid Membranes for Dye Reduction: A Comprehensive Review","authors":"Mahsa Taheri","doi":"10.1002/gch2.202300052","DOIUrl":"10.1002/gch2.202300052","url":null,"abstract":"Separating valuable materials such as dyes from wastewater using membranes and returning them to the production line is a desirable environmental and economical procedure. However, sometimes, besides filtration, adsorption, and separation processes, pollutant destruction also can be suitable using photocatalytic membranes. The art of producing nanohybrid materials in contrast with nanocomposites encompasses nanomaterial synthesis as a new product with different properties from raw materials for nanohybrids versus the composition of nanomaterials for nanocomposites. According to the findings of this research, confirming proper synthesis of nanohybrid is one challenge that can be overcome by different analyses, other researchers' reports, and the theoretical assessment of physical or chemical reactions. The application of organic-inorganic nanomaterials and frameworks is another challenge that is discussed in the present work. According to the findings, Nanohybrid Membranes (NHMs) can achieve 100% decolorization, but cannot eliminate salts and dyes, although the removal efficiency is notable for some salts, especially divalent salts. Hydrophilicity, antifouling properties, flux, pressure, costs, usage frequency, and mechanical, chemical, and thermal stabilities of NHMs should be considered.","PeriodicalId":12646,"journal":{"name":"Global Challenges","volume":"8 1","pages":""},"PeriodicalIF":4.9,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/gch2.202300052","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138951076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Green Coffee Bean Extract Assisted Facile Synthesis of Reduced Graphene Oxide and Its Dye Removal Activity 绿咖啡豆提取物辅助简易合成还原石墨烯氧化物及其染料去除活性

IF 4.9 4区综合性期刊

Global Challenges Pub Date : 2023-12-21 DOI: 10.1002/gch2.202300247

A.B.M. Nazmul Islam, Prianka Saha, Md. Emran Hossain, Md. Ahsan Habib, Kaykobad Md. Rezaul Karim, Md. Mahiuddin

{"title":"Green Coffee Bean Extract Assisted Facile Synthesis of Reduced Graphene Oxide and Its Dye Removal Activity","authors":"A.B.M. Nazmul Islam, Prianka Saha, Md. Emran Hossain, Md. Ahsan Habib, Kaykobad Md. Rezaul Karim, Md. Mahiuddin","doi":"10.1002/gch2.202300247","DOIUrl":"10.1002/gch2.202300247","url":null,"abstract":"To discharge the colored effluents from industries there needs to be effective and affordable treatment options. Adsorption using reduced graphene oxide (rGO) as an adsorbent is a prominent one. In this study, green coffee bean extract (GCBE) is utilized as a safe reducing agent for the reduction of graphene oxide (GO) to synthesize rGO. The formation of rGO is confirmed by a new peak in the UV–vis spectra at 275 nm and a diffraction peak in the XRD patterns at 22°. The effective formation of rGO is further substantiated by a change in the GO peak's properties in the FTIR, EDX, and Raman spectra and a weight loss change in TGA. The SEM and TEM analyses demonstrate the effective production of the nano-sheets of rGO having exfoliated and segregated in a few layers. Furthermore, the obtained rGO exhibited outstanding efficacy in wastewater cleanup, effectively adsorbing MB as a prototype organic dye. The kinetics and isotherm study suggested that the adsorption leads by the chemisorption and monolayer formation on the homogeneous surface of rGO. The maximum adsorption capacity is found to be 89.3 mg g−1. This process offers a fresh opportunity for the economical and safe production of rGO for wastewater treatment.","PeriodicalId":12646,"journal":{"name":"Global Challenges","volume":"8 1","pages":""},"PeriodicalIF":4.9,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/gch2.202300247","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138951629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Conditions for CaCO3 Biomineralization by Trichoderma Reesei with the Perspective of Developing Fungi-Mediated Self-Healing Concrete 从开发真菌介导的自愈合混凝土的角度看毛霉的 CaCO3 生物矿化条件

IF 4.9 4区综合性期刊

Global Challenges Pub Date : 2023-12-21 DOI: 10.1002/gch2.202300160

Aurélie Van Wylick, Hubert Rahier, Lars De Laet, Eveline Peeters

{"title":"Conditions for CaCO3 Biomineralization by Trichoderma Reesei with the Perspective of Developing Fungi-Mediated Self-Healing Concrete","authors":"Aurélie Van Wylick, Hubert Rahier, Lars De Laet, Eveline Peeters","doi":"10.1002/gch2.202300160","DOIUrl":"10.1002/gch2.202300160","url":null,"abstract":"Concrete, a widely used building material, often suffers from cracks that lead to corrosion and degradation. A promising solution to enhance its durability is the use of fungi as self-healing agents, specifically by harnessing their ability to promote calcium carbonate (CaCO3) precipitation on their cell walls. However, the ideal conditions for CaCO3 precipitation by the filamentous fungal species Trichoderma reesei are still unclear. In this study, the biomineralization properties of T. reesei in liquid media are investigated. Two different calcium sources, calcium chloride (CaCl2) and calcium lactate are tested, at varying concentrations and in the presence of different nutritional sources that support growth of T. reesei. This study also explores the effects on fungal growth upon adding cement to the medium. Calcium lactate promotes greater fungal biomass production, although less crystals are formed as compared to samples with CaCl2. An increasing calcium concentration positively influences fungal growth and precipitation, but this effect is hindered upon the addition of cement. The highest amounts of biomass and calcium carbonate precipitation are achieved with potato dextrose broth as a nutritional source. By identifying the optimal conditions for CaCO3 precipitation by T. reesei, this study highlights its potential as a self-healing agent in concrete.","PeriodicalId":12646,"journal":{"name":"Global Challenges","volume":"8 1","pages":""},"PeriodicalIF":4.9,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/gch2.202300160","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138948437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Imogolite Nanotubes and Their Permanently Polarized Bifunctional Surfaces for Photocatalytic Hydrogen Production 用于光催化制氢的 Imogolite 纳米管及其永久极化双功能表面

IF 4.9 4区综合性期刊

Global Challenges Pub Date : 2023-12-20 DOI: 10.1002/gch2.202300255

Erwan Paineau, Gilberto Teobaldi, Pablo Jiménez-Calvo

{"title":"Imogolite Nanotubes and Their Permanently Polarized Bifunctional Surfaces for Photocatalytic Hydrogen Production","authors":"Erwan Paineau, Gilberto Teobaldi, Pablo Jiménez-Calvo","doi":"10.1002/gch2.202300255","DOIUrl":"10.1002/gch2.202300255","url":null,"abstract":"To date, imogolite nanotubes (INTs) have been primarily used for environmental applications such as dye and pollutant degradation. However, imogolite's well-defined porous structure and distinctive electro-optical properties have prompted interest in the system's potential for energy-relevant chemical reactions. The imogolite structure leads to a permanent intrawall polarization arising from the presence of bifunctional surfaces at the inner and outer tube walls. Density functional theory simulations suggest such bifunctionality to encompass also spatially separated band edges. Altogether, these elements make INTs appealing candidates for facilitating chemical conversion reactions. Despite their potential, the exploitation of imogolite's features for photocatalysis is at its infancy, thence relatively unexplored. This perspective overviews the basic physical-chemical and optoelectronical properties of imogolite nanotubes, emphasizing their role as wide bandgap insulator. Imogolite nanotubes have multifaceted properties that could lead to beneficial outcomes in energy-related applications. This work illustrates two case studies demonstrating a step-forward on photocatalytic hydrogen production achieved through atomic doping or metal co-catalyst. INTs exhibit potential in energy conversion and storage, due to their ability to accommodate functions such as enhancing charge separation and influencing the chemical potentials of interacting species. Yet, tapping into potential for energy-relevant application needs further experimental research, computational, and theoretical analysis.","PeriodicalId":12646,"journal":{"name":"Global Challenges","volume":"8 6","pages":""},"PeriodicalIF":4.9,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/gch2.202300255","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139036379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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The Fragile State of Industrial Agriculture: Estimating Crop Yield Reductions in a Global Catastrophic Infrastructure Loss Scenario 工业化农业的脆弱状态：估算全球灾难性基础设施损失情景下的作物减产情况

IF 4.9 4区综合性期刊

Global Challenges Pub Date : 2023-12-20 DOI: 10.1002/gch2.202300206

Jessica Moersdorf, Morgan Rivers, David Denkenberger, Lutz Breuer, Florian Ulrich Jehn

{"title":"The Fragile State of Industrial Agriculture: Estimating Crop Yield Reductions in a Global Catastrophic Infrastructure Loss Scenario","authors":"Jessica Moersdorf, Morgan Rivers, David Denkenberger, Lutz Breuer, Florian Ulrich Jehn","doi":"10.1002/gch2.202300206","DOIUrl":"10.1002/gch2.202300206","url":null,"abstract":"Modern civilization relies on a complex, globally interconnected industrial agriculture system to produce food. Its unprecedented yields hinge on external inputs like machinery, fertilizers, and pesticides, rendering it vulnerable to disruptions in production and international trade. Such a disruption could be caused by large-scale damage to the electrical grid. Solar storms, nuclear detonations in the upper atmosphere, pandemics, or cyber-attacks, could cause this severe damage to electrical infrastructure. To assess the impact of such a global catastrophic infrastructure loss on major food crops (corn, rice, soybean, wheat), we employ a generalized linear model. The predictions show a crop-specific yield reduction between 15% and 37% in phase 1, the year after the catastrophe, assuming rationed use of fertilizers, pesticides, and fuel stocks. In phase 2, when all stocks are depleted, yields decrease by 35%–48%. Soybean is less affected in phase 1, while all crops experience strong declines in phase 2. Europe, North and South America, and parts of India, China, and Indonesia face major yield reductions, potentially up to 75%, while most African countries are less affected. These findings underscore the necessity for preparation by highlighting the vulnerability of the food system.","PeriodicalId":12646,"journal":{"name":"Global Challenges","volume":"8 1","pages":""},"PeriodicalIF":4.9,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/gch2.202300206","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138954284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Sustainable Power Generation Through Solar-Driven Integration of Brayton and Transcritical CO2 Cycles: A Comprehensive 3E (Energy, Exergy, and Exergoenvironmental) Evaluation 通过太阳能驱动的布雷顿和跨临界二氧化碳循环一体化实现可持续发电：全面的 3E（能量、放热和放热环境）评估

IF 4.9 4区综合性期刊

Global Challenges Pub Date : 2023-12-20 DOI: 10.1002/gch2.202300223

Yunis Khan, Roshan Raman, Zafar Said, Hakan Caliskan, Hiki Hong

{"title":"Sustainable Power Generation Through Solar-Driven Integration of Brayton and Transcritical CO2 Cycles: A Comprehensive 3E (Energy, Exergy, and Exergoenvironmental) Evaluation","authors":"Yunis Khan, Roshan Raman, Zafar Said, Hakan Caliskan, Hiki Hong","doi":"10.1002/gch2.202300223","DOIUrl":"10.1002/gch2.202300223","url":null,"abstract":"Solar power tower technology has strong potential among the other concentration solar power techniques for large power generation. Therefore, it is necessary to make a new and efficient power conversion system for utilizing the solar power tower system. In present research, a novel combined cycle is proposed to generate power for the application of the solar power tower. The pre-compression configuration of the Brayton cycle is used as a topping cycle in which helium is taken as the working fluid. The transcritical CO2 cycle is used as bottoming cycle for using the waste heat. The proposed system is investigated based on exergy, energy, and exergoenvironmental point of view using computational technique engineering equation solver. Also, the parametric analysis is carried out to check the impact of the different variables on the system performance. It is concluded that the overall plant's optimized thermal and exergy efficiencies are obtained as 31.59% and 33.12%, respectively, at 800 °C optimum temperature of combined cycle and 850 W m−2 of direct normal irradiation and 2.278 of compressor pressure ratio. However, exergetic stability factor and exergoenvironmental impact index are observed as 0.5952 and 0.6801 respectively. The present proposed system performs better than the previous studies with fewer components.","PeriodicalId":12646,"journal":{"name":"Global Challenges","volume":"8 2","pages":""},"PeriodicalIF":4.9,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/gch2.202300223","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138957736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0