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Electrolytic upcycling of PET waste plastics for energy-efficient hydrogen evolution
DOI: 10.1039/D5GC00355E, PaperGuohao Xu, Zhaopeng Sun, Kai He, Xinyue He, Kai Liu, Jichang Liu, Bingjie Zhou, Yulin Deng, Wei Liu
We achieved the conversion of waste PET into TPA and hydrogen energy under mildly acidic conditions (100 °C; acid concentration <2.5 mol L−1).
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Electrochemically assisted deprotection of acetals, ketals, and dithioacetals under neutral conditions
DOI: 10.1039/D4GC06348A, PaperYuka Abe, Tsuyoshi Yamada, Takuhei Yamamoto, Yukihiro Esaka, Takashi Ikawa, Hironao Sajiki
A novel electrochemical deprotection method for acetals, ketals and dithioacetals was developed, yielding carbonyl compounds. LiClO4 acts as both an electrolyte and oxygen source, while 1,3,5-trioxane enhances reaction efficiency as a Li activator.
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Highly efficient fabrication of lemon peel-derived carbon quantum dots for multicolor light-emitting diodes
DOI: 10.1039/D5GC01179E, PaperLingli Zhu, Jin Cao, Hongmin Yang, Dekui Shen, Haitao Hu, Mengjia Dou
Biomass-derived CQDs have emerged as a promising sustainable alternative to conventional semiconductor quantum dots for LED applications, offering distinct advantages in terms of renewability, low toxicity, and environmental friendliness.
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Waste-minimized, ecofriendly, and chemoselective room-temperature hydrogenation of CC bonds using a homogeneous recyclable imidazole-based Ru(II)-p-cym catalyst
DOI: 10.1039/D5GC01274K, PaperRahul Daga Patil, Sandip Bapu Khatal, Manohar Shivaji Padmor, Sanjay Pratihar
Catalytic hydrogenation of CC bonds is crucial in fine chemical and pharmaceutical synthesis, yet the efficient recovery and reuse of homogeneous catalysts remain a challenge.
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Molecular-level design and green process engineering: optimizing pseudo-graphitic domains in pitch-derived hard carbon for fast sodium storage
DOI: 10.1039/D5GC00902B, PaperDan Zhao, Hanqing Zhao, Lingwei Kong, Shulian Lei, Boyan Cui, Tingjun Fu, Zhong Li
Graphite nanodomains grow in situ controllably in CTP precursors by a green oxidation–hydrothermal strategy, forming expanded-spacing pseudo-graphitic layers around closed pores in hard carbon that boost rapid sodium storage.
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Low-temperature molten salt ion regeneration strategy towards green and efficient spent graphite recycling
DOI: 10.1039/D5GC00513B, PaperWenchao Zhu, Gonggang Liu, Jinbo Hu, Geng Su, Miaohua Liu, Xianjun Li, Binghui Xu
A green and efficient method to regenerate spent graphite by molten salt ion-assisted thermal treatment in an air atmosphere has been demonstrated, wherein abundant nanochannels and CO bonds are introduced to boost lithium storage performance.
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Multidimensional metabolic engineering of Yarrowia lipolytica for highly efficient biosynthesis of betulinic acid
DOI: 10.1039/D5GC01276G, PaperXiaoyan Li, Liangcheng Jiao, Guowei Zhao, yunchong li, Yunjun Yan, Jinyong Yan
Engineered yeast has emerged as a promising platform for the production of anticancer drug betulinic acid (BA), yet its efficiency is often hampered by low cytochrome P450 enzyme activity, inadequate...
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A general strategy for strengthening and toughening physical hydrogels via anti-Hofmeister sequence solid salting-out
DOI: 10.1039/D5GC00826C, PaperEn-Jiang Liu, Ding-ding Lü, Bai-Chuan Lu, Run-Ze Hu, Shi-Wen Guo, Chen-Man Zong, Xiao-Hui Yao, Xue-Yang Wang, Tao Chen, Ai-jun Wan, Dong-Yang Zhang
In recent years, many strategies have been developed to enhance the mechanical properties of hydrogels. However, due to the complex process, the addition of non-green crosslinking agents and the use...
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Cosa sappiamo delle nano-plastiche
Luigi Campanella
I prodotti plastici apprezzati per i loro bassi costi e per la loro durevolezza sono divenuti indispensabili nella società moderna. L’uso pervasivo della plastica ha però prodotto una grave crisi ambientale con una previsione di arrivare a 800 milioni di tonnellate consumati nel 2050. La degradazione degli scarti e rifiuti plastici attraverso processi chimici, fisici e biologici genera micro e nano plastiche che minacciano ecosistema e salute dei suoi abitanti. Le microplastiche sono state ritrovate nell’ambiente marino, nelle acque superficiali, perfino in regioni remote, come quelle artiche. Allarmanti recenti studi hanno riportato evidenze di nano-plastiche in tessuti umani, inclusa la placenta il fegato, i reni, il sangue evidenziando i relativi effetti tossici.
I rischi ambientali ed igienico sanitari posti dalle microplastiche sono divenuti un problema di assoluta primaria importanza. Le microplastiche attaccano l’ecosistema marino alterando fonti alimentari e cicli biogeochimici e l’ingestione di microplastiche da parte degli organismi marini porta al loro bioaccumulo.
Da un punto di vista della salute umana le nano-plastiche penetrano nelle cellule attraverso meccanismi come la endocitosi, la fagocitosi, la diffusione passiva inducendo lo stress ossidativo, cioè quello stato patologico derivato da un eccesso di radicali liberi nell’organismo non contrastato dalle difese endogene antiossidanti con conseguenti danni a RNA, DNA, proteine, grassi, da correlare a patologie anche gravi come i tumori, i disordini neurologici, l’invecchiamento precoce.
Ad oggi i meccanismi con cui si passa dallo stress ossidativo a queste patologie non é però noto soprattutto a lunga scadenza ed in condizioni di interazioni multisistemiche. I recenti progressi nell’analisi bibliometrica forniscono preziosi strumenti per sintetizzare i risultati delle ricerche sul tema ed identificare i gap culturali da coprire in certi settori. Mappando sistematicamente i risultati delle ricerche su micro e nano-plastiche si può così collegare quanto manca in termini di conoscenza con quanto invece si conosce, seguendo la progressiva copertura del gap.
Cosa sappiamo sulle nano-plastiche e il loro effetto sull’uomo e sull’ambiente? La recente pubblicazione della serie “Future Brief”, numero 27, promossa dalla DG Ambiente della Commissione europea, prova a fare il punto sullo stato della ricerca e delle conoscenze in materia di nanoparticelle plastiche, quale crescente preoccupazione per l’ambiente e per l’uomo. Per tirare in estrema sintesi le somme, il report Nanoplastics: state of knowledge and environmental and human health impacts risponde alla domanda come segue: conosciamo così poco le nano-plastiche da non poterne prevedere una regolamentazione specifica, ma ne sappiamo abbastanza da poter provare che esistono e che l’uomo le sta ingerendo e inalando a concentrazioni incalcolabili.
E non è una buona notizia.
Riferimenti
La conclusione del documento UE:
Dalla ricerca qui presentata emerge chiaramente che l’intero ciclo di vita della plastica – dalla “culla” alla “tomba” – non è completo quando non possiamo più vedere la plastica: la plastica continua ad avere effetti ambientali ben oltre il momento in cui diventa invisibile. Il mancato controllo di questi inquinanti invisibili, che già permeano l’ambiente terrestre, atmosferico, acquatico e biologico, contribuisce a un pericolo crescente, di cui potremmo comprendere appieno le proporzioni solo quando sarà troppo tardi.
Polymer Monomers Fabricated from Biomass Platform Molecules over Metal-free Catalysts
DOI: 10.1039/D5GC01162K, PaperSiwei Xu, Nian Xiang, Jie He, Yang Li, Huankun Nie, Liang Huang, Chongbei Wu, Zehui Zhang
Developing new catalytic methods in the effective syntheses of 2,5-furandicarboxylic acid (FDCA) and glycolic acid (GA) through the selective oxidation of biomass-derived 5-hydroxymethylfurfural (HMF) and 1,3-dihydroxyacetone (DHA) offer green and...
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Engineering a Hybrid System of Corynebacterium glutamicum and Co-Immobilized Enzyme for Efficient Cadaverine Production from Glycerol
DOI: 10.1039/D5GC00694E, Paperyunpeng lv, Simin Liu, Liang Wei, Lei Zhang, Haishan Qi
1,5-Diaminopentane (cadaverine) is the critical raw material for producing bio-based polyamides. With growing concerns about the depletion of fossil resources and the increasing demand for sustainable industrial solutions, the biosynthesis...
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Production of high-carbon-number hydrocarbon bio-aviation fuels via catalytic hydrogenation of vanillin and non-catalytic condensation: a mechanistic study with DFT and experimental insights
DOI: 10.1039/D5GC00281H, Paper
Open Access 
  This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.Jina Eun, Jeonghun Kim, Han Byeol Kim, Do Heui Kim, Jae-Wook Choi, Kwang Ho Kim, Chun-Jae Yoo, Seongmin Jin, Kyeongsu Kim, Hyunjoo Lee, Chang Soo Kim, Kwan-Young Lee, Jong Suk Yoo, Seo-Jung Han, Keunhong Jeong, Jeong-Myeong HaLignocellulose or lignin present significant potential as sustainable feedstocks to replace petroleum-derived resources through catalytic upgrading.
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Sustainable chemo-enzymatic NADP(H) synthesis from biomass-derived xylose, polyphosphate, and nicotinamide
DOI: 10.1039/D5GC00983A, PaperKai-Cheng Wang, Shota Nishikawa, Wan-Wen Ting, Xue-Hong Luo, Takumi Takahashi, Tony Z. Jia, Min-Hsuan Huang, Kosuke Fujishima, I-Son Ng, Po-Hsiang Wang
Chemo-enzymatic NAD(P)H synthetic strategy from biomass-derived crude xylose and nicotinamide.
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Enhancing selectivity and stability in electrochemical CO2 reduction using tailored sputtered CuAg electrodes
DOI: 10.1039/D4GC06164K, PaperMathias van der Veer, Nick Daems, Pegie Cool, Tom Breugelmans
A bimetallic CuAg alloy with 1% Ag, offers a promising method to convert captured CO2 to valuable chemicals, such as ethylene and ethanol.
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Integrated design of multifunctional reinforced bioplastics (MReB) to synergistically enhance strength, degradability, and functionality
DOI: 10.1039/D4GC02440K, Paper
Open Access 
  This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.Jinghao Li, Wei Liu, Alex Chang, Zachariah Foudeh, Jiali Yu, Peiran Wei, Kainan Chen, Cheng Hu, Dhatt Puneet, Susie Y. Dai, Joshua S. YuanBioplastics have emerged as a tangible solution to the plastic waste crisis.
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Synergistic nanoalloy PdCu/TiO2 catalyst for in situ hydrogenation of biomass-derived furfural at room temperature
DOI: 10.1039/D5GC00006H, PaperChand Adarsh Ashwani, Palanivel Subha, Lavanya Yalagandula, Christophe Len, Satyapaul A. Singh, Putla Sudarsanam
The PdCu nanoalloy supported on TiO2 nanorods effectively catalyzed the in situ hydrogenation of furfural at room temperature, showcasing efficient catalyst reusability and reaction scalability without requiring high-pressure conditions.
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Upgrading biomass-derived glycerol into terminal olefins via molybdenum-catalyzed carbon-chain extension
DOI: 10.1039/D5GC00843C, PaperHan Yin, Xiangtao Kong, Rui Lu, Xi Zhang, Wenbing Yu, Huifang Jiang, Xuhai Zhu, Fang Lu
A novel molybdenum-catalyzed process for carbon-chain extension of glycerol has been developed to produce 1,5-hexadiene.
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Sustainable potassium sorbate production from triacetic acid lactone in food-grade solvents
DOI: 10.1039/D4GC04832F, PaperMin Soo Kim, Sarang S. Bhagwat, Leoncio Santiago-Martínez, Xiaolei Shi, Kyuhyeok Choi, Jeremy S. Guest, George W. Huber
We propose a sustainable route to produce triacetic acetic acid (TAL)-derived potassium sorbate (KS) in food-grade solvents such as IPA and EtOH.
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Activating dynamic Zn–ZnO interface with controllable oxygen vacancy in CO2 electroreduction for boosting CO production
DOI: 10.1039/D5GC00955C, PaperXueqi Liu, Jingmin Ge, Shiying Li, Huanhuan Yang, Huiwen Tian, Hongpo Liu, Yaxi Li, Xiaoli Zheng, Yapeng Tian, Xinwei Cui, Qun Xu
ZnO undergoes in situ reconstruction into Zn@ZnO with controllable Zn–ZnO interfaces and oxygen vacancies, which boosted CO2RR-to-CO.
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Ambient and green processing of lead-free double perovskite Cs2AgBiBr6 films
DOI: 10.1039/D5GC00722D, Paper
Open Access   This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.Qian Chen, Abhinav K. Singh, Hissah Alghathami, Xuzhao Liu, Kun Huang, Andrew G. Thomas, Richard J. Curry, Laurie J. Phillips, Amanda J. HughesA green and simple method for processing high-quality lead-free perovskite Cs2AgBiBr6 films under ambient conditions for future optoelectronic applications.
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