ACS Applied Materials & Interfaces
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2018
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IF 8.097
Meng Kong,Mingjie Li,Ruoxu Shang,Jingyu Wu,Peisong Yan,Dongmei Xu,Chaoxu Li
Marine shells not only represent a rapidly accumulating type of fishery wastes but also offer a unique sort of hybrid nanomaterials produced greenly and massively in nature. The elaborate “brick and mortar” structures of nacre enabled the synthesis of carbon nanomeshes with <1 nm thickness, hierarchical porosity, and high specific surface area through pyrolysis, in which two-dimensional (2D) organic layers served as the carbonaceous precursor and aragonite platelets as the hard template. Mineral bridges within 2D organic layers templated the formation of mesh pores of 20–70 nm. In contrast to other hydrophobic carbon nanomaterials, these carbon nanomeshes showed super dispersibility in diverse solvents and thus processability for membranes through filtration, patterning, spray-coating, and ink-writing. The carbon membranes with layered structures were capable of serving not only for high-flux filtration and continuous flow absorption but also for electrochemical and strain sensing with high sensitivity. Thus, utilization of marine shells, on one hand, relieves the environmental concern of shellfish waste, on the other hand, offers a facile, green, low-cost, and massive approach to synthesize unique carbon nanomeshes alternative to graphene nanomeshes and applicable in environmental adsorption, filtration, wearable sensors, and flexible microelectronics.
研究领域:
材料科学
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环境科学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
GREEN CHEMISTRY
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2024
·Vol. 26
·期 14
·8282-8297
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IF 9.3
Jin-Hua Mou,Ling-Feng Ouyang,Zi-Hao Qin,Ya-Hui Miao,Xin-Tian Jiang,Mui-Choo Jong,Man-Chung Tang,Chenyu Du,Season Si Chen,Carol Sze Ki Lin
Waste valorisation plays a crucial role in the sustainable production of valuable chemicals and materials. This study investigates the feasibility of green technology utilising food waste as a renewable substrate for lactic acid and the resulting residue for subsequent carbon dot production through microbial fermentation and hydrothermal reaction, respectively, while evaluating seashell waste as a replacement for commercial neutralisation reagents. The results demonstrated that seashell waste exhibited effective neutralisation performance during lactic acid fermentation. Within the five types of seashell waste studied, apart from abalone seashells, which led to a significant decrease in lactic acid productivity, all resulted in similar lactic acid fermentations. Additionally, fine powders of seashells were found to be optimal when combined with food waste hydrolysate for lactic acid fermentation. The highest lactic acid productivity of 1.48 g L−1 h−1 obtained in 2 L bioreactor batch fermentation using fine shell powder was 1.64-fold and 0.41-fold higher than those obtained using shell pieces and shell powder, respectively. The results of cell immobilisation fermentation exhibited a superior performance with 2.90 g L−1 h−1 glucose consumption rate and 1.89 g L−1 h−1 lactic acid productivity, which were 1.23-fold and 0.97-fold higher compared to those obtained using NaOH as the neutraliser, respectively. The results of life-cycle assessment also revealed lower environmental impacts associated with lactic acid production using food waste and seashell waste. Cell biomass derived from this study was further utilised to synthesise biomass-derived carbon quantum dots (Bio-CQDs), which demonstrated excellent water solubility, photophysical properties, and potential application as an antibiotic sensor. Overall, the study highlights the potential of seashell waste as an acid neutraliser in lactic acid fermentation and showcases the promising properties of fluorescent Bio-CQDs synthesised from cell biomass, providing valuable insights into the development and implementation of green and sustainable production from waste sources.
研究领域:
生物技术
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环境科学
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材料科学
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产品关联
DOI
高影响因子
Journal of Nanoelectronics and Optoelectronics
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2018
·Vol. 13
·期 12
·1807-1815
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IF 1.069
Wang Zheng,Wang Yan-Shi,Tong Zhuang,Deng Qin,Luo Sheng-Xu
This paper reports the formation of novel adsorbent material based on undulating venus shell (UVS), white conch shell (WCS), conus conch shell (CCS) and abalone shell (AS). These absorbent materials were prepared by grinding the shells followed by high-temperature calcination process.
The prepared adsorbents were well characterized by scanning electron microscopy (SEM), X-ray diffraction and Fourier transform infrared (FTIR) spectroscopy. Further, the effects of adsorbent dosage and temperature on the adsorption of Cd2+ by shell powder and related adsorption
isotherms were evaluated. The results indicated that the amount of adsorbent and temperature have a great influence on the adsorption process of the four adsorbents. Under optimized conditions, the four shell powders exhibited strong adsorption properties of Cd2+ which was consistent
with the Freundlich isotherm adsorption model. The optimal conditions for preparing shell powder adsorbents with the best adsorption performance were determined by evaluating the particle size, calcination temperature and calcination time during the preparation process and the prepared materials
were characterized by several techniques. The results demonstrated that the particle size of UVS powder was over 140 mesh at 450 °C with activation time of 60 min. Furthermore, the UVS powder exhibits apparent porous morphology after calcination and thus the specific surface area was markedly
increased. Consequently, the adsorption performance was significantly improved.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ACS Omega
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2018
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IF 0
Kaisong Yuan,Junxia Zheng,Danting Yang,Beatriz Jurado Sánchez,Xiangjiang Liu,Xinjie Guo,Chusheng Liu,Nicoleta Elena Dina,Jingyi Jian,Zhijun Bao,Ziwei Hu,Zhihong Liang,Haibo Zhou,Zhengjin Jiang
Herein, we developed a natural surface-enhanced Raman scattering (SERS) substrate based on size-tunable Au@Ag nanoparticle-coated mussel shell to form large-scale three-dimensional (3D) supercrystals (up to 10 cm2) that exhibit surface-laminated structures and crossed nanoplates and nanochannels. The high content of CaCO3 in the mussel shell results in superior hydrophobicity for analyte enrichment, and the crossed nanoplates and nanochannels provided rich SERS hot spots, which together lead to high sensitivity. Finite-difference time-domain simulations showed that nanoparticles in the channels exhibit apparently a higher electromagnetic field enhancement than nanoparticles on the platelets. Thus, under optimized conditions (using Au@AgNPs with 5 nm shell thickness), highly sensitive SERS detection with a detection limit as low as 10–9 M for rhodamine 6G was obtained. Moreover, the maximum electromagnetic field enhancement of different types of 3D supercrystals shows no apparent difference, and Au@AgNPs were uniformly distributed such that reproducible SERS measurements with a 6.5% variation (613 cm–1 peak) over 20 spectra were achieved. More importantly, the as-prepared SERS substrates can be utilized for the fast discrimination of Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa by discriminant analysis. This novel Au@Ag self-assembled mussel shell template holds considerable promise as low-cost, durable, sensitive, and reproducible substrates for future SERS-based biosensors.
研究领域:
材料科学
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分析化学
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生物医学
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产品关联
DOI
PubMed
CHINESE JOURNAL OF CATALYSIS
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2020
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IF 6.146
Jiaqi Wang,Qingrong Qian,Qinghua Chen,Xin-Ping Liu,Yongjin Luo,Hun Xue,Zhaohui Li
TiO 2 -seashell composites prepared via a sol-gel method were used to generate carbonate radicals (•CO 3 − ) under solar light irradiation. •CO 3 − , a selective radical, was employed to degrade the target tetracycline hydrochloride contaminant. A series of characterizations was carried out to study the structure and composition of the synthesized TiO 2 -seashell composite. This material exhibits excellent solar light-driven photochemical activity in the decomposition of tetracycline hydrochloride. The possible pathway and mechanism for the photodegradation process were proposed on the basis of high-resolution electrospray ionization time-of-flight mass spectrometry experiments. Finally, we investigated the reusability of the TiO 2 -seashell composite. This study is expected to provide a new facile pathway for the application of •CO 3 − radicals to degrade special organic pollutants in water.
研究领域:
环境科学
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材料科学
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光化学
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水处理
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产品关联
DOI
高影响因子
AQUACULTURE
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2024
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IF 3.9
Kunyin Jiang,Hong Yu,Lingfeng Kong,Shikai Liu,Shaojun Du,Qi Li
The visually appealing shell colours and intricate patterns of shellfish not only attract consumers but also enhance their economic value. Understanding the inheritance pattern of shell colour and the molecular mechanism of pigmentation is highly important for enhancing breeding efficiency. This study involved the identification of a tyrosine hydroxylase gene ( CgTH ) and the investigation of its function in the metabolism of tyrosine and pigmentation in Pacific oysters. CgTH contains a conserved Biopterin_H domain that consists of a binding site for iron atoms and a binding site for tetrahydrobiopterin (BH4). Quantitative PCR (qPCR) and immunofluorescence analysis revealed that the expression of CgTH was higher in the mantle of black shell oysters in comparison to the white strain. The in vitro and in vivo experiments confirmed that Cg TH is involved in tyrosine metabolism through the catalysis of the conversion of L-tyrosine to L-DOPA. In order to examine its functions in melanin synthesis in oysters, 3-Iodo-L-tyrosine (3-IT) treatment, RNA interference (RNAi), and L-DOPA treatment assays were conducted. The results of our study showed that 3-IT effectively inhibited Cg TH activity, leading to a suppression of tyrosine metabolism. Knockdown of Cg TH hindered the cAMP-CREM-MITF axis and decreased pigmentation. On the other hand, L-DOPA stimulated melanin production through cAMP signaling and counteracted the inhibitory effects of 3-IT on the metabolism of tyrosine. These data indicated that there may be a feedback loop involving Cg TH and the cAMP-CREM-MITF axis that regulates tyrosine metabolism and melanogenesis in Pacific oysters. This study enhances our understanding of the molecular mechanism that governs oyster pigmentation and offers a possible molecular indicator for the targeted breeding of particular strains of Pacific oysters ( Crassostrea gigas ).
研究领域:
海洋生物学
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分子生物学
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遗传学
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水产养殖
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）