Nature Communications
·
2019
·Vol. 10
·期 1
·1-12
·
IF 11.878
Zhu Huawei,Meng Hengkai,Zhang Wei,Gao Haichun,Zhou Jie,Zhang Yanping,Li Yin
Microbial biophotovoltaics (BPV) offers a biological solution for renewable energy production by using photosynthetic microorganisms as light absorbers. Although abiotic engineering approaches, e.g., electrode modification and device optimization, can enhance the electrochemical communication between living cells and electrodes, the power densities of BPV are still low due to the weak exoelectrogenic activity of photosynthetic microorganisms. Here, we develop a BPV based on a d -lactate mediated microbial consortium consisting of photosynthetic cyanobacteria and exoelectrogenic Shewanella . By directing solar energy from photons to d -lactate, then to electricity, this BPV generates a power density of over 150 mW·m −2 in a temporal separation setup. Furthermore, a spatial-temporal separation setup with medium replenishment enables stable operation for over 40 days with an average power density of 135 mW·m −2 . These results demonstrate the electron flow constrained microbial consortium can facilitate electron export from photosynthetic cells and achieve an efficient and durable power output.
研究领域:
生物能工程
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微生物学
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PubMed
高影响因子
CURRENT MICROBIOLOGY
·
2014
·Vol. 70
·期 1
·27-34
·
IF 1.359
Wang Shuzhi,Pan Xiangliang,Zhang Daoyong
The
knowledge of the effects of Sb(V) on the physiological characteristics of cyanobacteria was still limited. In the present study, responses of photosystem I and II (PSI and PSII), cyclic electron flow (CEF), and interphotosystem electron transport of Microcystis aeruginosa to 5–100 mg/l Sb(V) were synchronously measured using the Dual-PAM-100. 5 mg/l Sb (V) significantly inhibited PSII activity, but had no significant effects on PSI activity. At higher concentrations of Sb(V), the quantum yield and electron transport of PSI were less affected compared to PSII. The ratio of Y (II)/ Y (I) significantly decreased with increasing Sb(V) concentration. It decreased from 0.7 for control to 0.4 for 100 mg/l Sb(V)-treated cells, indicating that the change of the distribution of quantum yields between two photosystems and more serious inhibition of PSII under stress of Sb(V) compared to PSI. CEF was activated associated with the inhibition of linear electron flow after exposure to Sb(V). The contribution of Y (CEF) to the quantum yield and activity of PSI increased with increasing Sb(V) concentrations. The cyclic electron transport rate made a significant contribution to electron transport rate of PSI, especially at high Sb(V) concentration (100 mg/l) and high illumination (above 555 μmol photons/m 2 /s). The stimulation of CEF was essential for the higher tolerance of PSI than PSII to Sb(V).
研究领域:
植物学
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环境科学
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PubMed
高影响因子
Environmental Science-Nano
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2025
·
IF 5.1
Zhongmiao Wang,Jie Hou,Jiang Xu,Kun Yang,Daohui Lin
Microorganisms are pivotal in decomposing persistent organic pollutants in the environment. However, the bioavailability of pollutants is often hindered by their strong adsorption to ubiquitous fine colloids. This study provides the first evidence that Rhodococcus biphenylivorans, a known intracellular oxidative degradation bacterium, can reductively degrade organochlorine pollutants adsorbed on biochar colloids (BCCs) extracellularly, besides the oxidative degradation of BCC-adsorbed pollutants intracellularly. Over a 30 day biodegradation period, the total biodegradation rates of adsorbed 2,4,4′-trichlorobiphenyl (PCB28, 10 mg L−1) on BCCs (1 g L−1) prepared at pyrolysis temperatures of 300, 500, and 700 °C were 59.4%, 34.8%, and 10.4%, respectively. The biodegradation products of adsorbed PCB28 on low-temperature BCCs were mainly chlorosubstituted-2-hydroxy-6-oxo-6-phenyl-2,4-hexadienoic acid-type products, while in the high-temperature BCC system, dichlorobiphenyl was the main product. Mechanistically, BCCs with low pyrolysis temperature could fragment during the degradation, facilitating the transport of adsorbed PCB28 into bacteria for the intracellular oxidative degradation; the interactions between bacterial cells and BCCs (especially with high pyrolysis temperature) could stimulate the respiratory chain electron efflux for the extracellular dechlorination degradation. These findings not only provide new insights into the modulatory influence of BCCs on microbial degradation of pollutants, but also enrich our knowledge on the environmental fate of colloid-adsorbed pollutants.
研究领域:
环境科学
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微生物学
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DOI
高影响因子
DYES AND PIGMENTS
·
2018
·
IF 3.767
Lei Zhang,Cunyu Li,Jingfa Li,Fan Jiang
Photo-responsive molecules have been widely investigated since they exhibit potential applications in optoelectronics and molecular devices. Although the photocurrents in some photo-responsive systems can be successfully turned ‘on’ and ‘off’ via light irradiation, the modulation of the vastly different directions of electron flow have seldom been realized by light (i.e., induce electron flow in opposite directions simply by light). In this manuscript, we provide evidence that the electron flow directions could be successfully controlled by light, using a molecule/TiO 2 hybrid system based on azo dyes (methyl red and ethyl red) as an example. In particular, a light-induced current exists when a UV light is employed, while the photocurrent direction isreversed when a visible light is employed. Possible origins of such peculiar photoelectrochemical behaviors are suggested, based on the optimized structures and electronic/optical properties determined from the first principles calculations. We expect that with further molecular engineering and structure optimization, the electron flow directions as well as the photocurrent intensities in functional materials could be better controlled by light, which provide a foundation for the fundamental understanding of the photo-responsive behaviors in advanced functional materials, and may pave the way for the design of novel optoelectronic devices and solar fuel systems in which the opposite electron transfer directions could be manipulated remotely by light sources.
研究领域:
材料科学
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光电子学
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分子工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2018
·
IF 6.735
Xuanwen Liu,Juanjuan Xu,Zhiyuan Ni,Renchao Wang,Junhua You,Rui Guo
The debated photocatalytic mechanism in the photocatalyst composite Ag 3 PO 4 /WO 3 is explored by analyzing the electron flow direction between Ag 3 PO 4 and WO 3 . Cubic phase WO 3 nanosheets with a thickness of 10–20 nm are prepared using the sintering method at 200 °C and decorated by cubic Ag 3 PO 4 particles using a practical deposition-precipitation method. Pure WO 3 shows a strong adsorption activity for rhodamine B (RhB) and methylene blue (MB), but no adsorption activity for methyl orange (MO) and it shows no photocatalytic activity on these three dye molecules. Pure Ag 3 PO 4 has no adsorption activity on RhB but shows a strong photocatalytic activity on RhB under visible light irradiation. As-prepared AW-x composites with different weight ratios show no adsorption activity but a high photocatalytic activity. However, after heat-treatment at 200 °C for 24 h, the composite catalysts show both a strong adsorption and photocatalytic activities on RhB. The results provide an indirect evidence that the electron flow direction is from WO 3 to Ag 3 PO 4 , which thus supports the Z-scheme photocatalytic mechanism.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
WATER RESEARCH
·
2024
·
IF 11.4
Yang Yu,Ang Li,Sheng-Qiang Fan,He-Ping Zhao
Dissimilatory iron-reducing bacteria (DIRB) with extracellular electron transfer (EET) capabilities have shown significant potential for bioremediating halogenated hydrocarbon contaminated sites rich in iron and humic substances. However, the role and microbial molecular mechanisms of iron-humic acid (Fe-HA) complexes in the reductive dehalogenation process of DIRB remains inadequately elucidated. In this study, we developed a sustainable carbon cycling approach using Fe-HA complexes to modulate the electron flux from sawdust (SD), enabling almost complete reductive dechlorination by most DIRB (e.g., Shewanella oneidensis MR-1) that lack complex iron-sulfur molybdo enzymes. The SD-Fe-HA/MR-1 system achieved a 96.52% removal efficiency of tetrachloroethylene (PCE) at concentrations up to 250 μmol/L within 60 days. Material characterization revealed that DIRB facilitated the hydrolysis of macromolecular carbon sources by inducing the formation of amorphous ferrihydrite (FeOOH) in Fe-HA complexes. More importantly, the bioavailable FeOOH activated additional intracellular electron flow pathways, increasing the activity of potential dehalogenases. Transcriptome further highlight the innovative role of biogenic amorphous FeOOH in integrating intracellular redox metabolism with extracellular charge exchange to facilitate reductive dechlorination in DIRB. These findings provide novel insights into accelerating reductive dechlorination in-situ contaminated sites lacking obligate dehalogenating bacteria.
研究领域:
环境微生物学
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污染修复
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DOI
高影响因子
Advanced Science
·
2025
·Vol. 12
·期 9
·2410561
·
IF 14.1
Youxiao Ren,Ling-Ling Wu,Wenjing Song,Yanan Gao,Litao Shao,Zhiyuan Lu,Songsong Wang,Xintian Shao,Zhenjie Yu,Mengrui Zhang,Jing Wu,Liwen Han,Kewu Zeng,Qixin Chen
Mitochondrial quality control is paramount for cellular development, with mitochondrial electron flow (Mito-EF) playing a central role in maintaining mitochondrial homeostasis. However, unlike visible protein entities, which can be monitored through chemical biotechnology, regulating mitochondrial quality control by invisible entities such as Mito-EF has remained elusive. Here, a Mito-EF tracker (Mito-EFT) with a four-pronged probe design is presented to elucidate the dynamic mechanisms of Mito-EF's involvement in mitochondrial quality control. Heightened aggregation of Mito-EF in fiber-like healthy mitochondria compared to round-like damaged mitochondria is demonstrated, revealed Mito-EF aggregation correlated with mitochondrial morphological remodeling, particularly in regions undergoing mitochondrial fission and fusion, and show the Mito-EF signal associated with mitochondrial cristae maintained by Dynamin-Related Protein 1 (DRP1). This underscores the importance of considering Mito-EF in assessing mitochondrial quality control parameters. A novel drug screening evaluation parameter, Mito-EF is also introduced to screen and discover mitochondrial-targeted therapeutic modulators. This tracker provides new avenues for investigating the role of Mito-EF in maintaining mitochondrial homeostasis and quality control, offering a potent tool for assessing mitochondrial quality and drug screening.
研究领域:
细胞生物学
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药物开发
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生物化学
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DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
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2022
·
IF 11.357
Mihebai Yilimulati,Lang Zhou,Dmitry Shevela,Shujuan Zhang
The regulation of photosynthetic machinery with a nonoxidative approach is a powerful but challenging strategy for the selective inhibition of bloom-forming cyanobacteria. Acetylacetone (AA) was recently found to be a target-selective cyanocide for Microcystis aeruginosa, but the cause and effect in the studied system are still unclear. By recording of the chemical fingerprints of the cells at two treatment intervals (12 and 72 h with 0.1 mM AA) with omics assays, the molecular mechanism of AA in inactivating Microcystis aeruginosa was elucidated. The results clearly reveal the effect of AA on ferredoxin and the consequent effects on the physiological and biochemical processes of Microcystis aeruginosa. In addition to its role as an electron acceptor of photosystem I, ferredoxin plays pivotal roles in the assimilation of nitrogen in cyanobacterial cells. The effect of AA on ferredoxin and on nonheme iron of photosystem II first cut off the photosynthetic electron transfer flow and then interrupted the synthesis of adenosine triphosphate (ATP) and reduced nicotinamide adenine dinucleotide phosphate (NADPH), which ultimately might affect carbon fixation and nitrogen assimilation metabolisms. The results here provide missing pieces in the current knowledge on the selective inhibition of cyanobacteria, which should shed light on the better control of harmful blooms.
研究领域:
环境科学
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微生物学
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生物化学
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生态学
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DOI
PubMed
高影响因子
Polymers
·
2024
·Vol. 16
·期 4
·539
·
IF 4.7
Jinxia Zhao,Jingchao Liu,Zenghe Li,Yilin Yin
In recent years, the response of new porous materials to visible light and their potential applications in wastewater treatment has received extensive attention from the scientific community. Metal Organic Frameworks (MOFs) and Covalent Organic Frameworks (COFs) have been the focus of attention due to their strong visible light absorption, high specific surface area, well-regulated pore structures, and diverse topologies. In this study, a novel MOF@COF composite with a high surface area, high crystallinity, and structural stability was obtained using the covalent bond formation strategy from COF-JLU19 and NH2-MIL-88B(Fe). Under visible light irradiation, the degradation of tetracycline hydrochloride by this material reached more than 90% within 10 min and was completely degraded within 30 min, which exceeded the degradation rate of individual materials. Remarkably, the catalytic activity decreased by less than 5% even after five degradation cycles, indicating good structural stability. The excellent photocatalytic performance of the NM88(DB)@COF-JLU19 hybrids was attributed to the formation of covalent bonds, which formed a non-homogeneous interface that facilitated effective charge separation and promoted the generation of hydroxyl radicals.
研究领域:
材料科学
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环境科学
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光催化技术
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产品关联
DOI
PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2023
·Vol. 37
·期 7
·e7117
·
IF 3.9
Ting Sun,Ping Gao,Shixian Zhang,Zhiren Wu,Jun Liu,Xinshan Rong
Semiconductor photocatalysis can utilize solar energy for clean energy conversion, but the catalytic efficiency is often unsatisfactory due to limited photo response and efficient separation of photogenerated carriers. In this work, 3D porous carbon nitride (3DPCN) composited oxygen vacancy-induced indium oxide (3DPCN/V O -In 2 O 3 ) was successfully prepared and analyzed by some characterization methods. Meanwhile, the performance of photocatalytic nitrogen fixation was further investigated. X-ray photoelectron spectroscopy and X-Ray diffraction (XRD) confirmed the successful preparation of the composites and revealed the electron flow direction; scanning electron microscopy (SEM) and transmission electron microscopy showed the surface structure of the composites; diffuse reflectance spectroscopy and temperature programmed desorption (TPD) revealed the energy band position and adsorption mechanism; electron paramagnetic resonance (EPR) characterization confirms the successful construction of oxygen vacancies; and electrochemical impedance spectroscopy, photoluminescence, and other photochemical characterization results showed that 3DPCN/V O -In 2 O 3 band gap is narrower and more effective in capturing light than other materials, improving the photocatalytic nitrogen fixation ability. The test results show that the nitrogen fixation capacity of 3DPCN/V O -In 2 O 3 can reach a maximum value of 156 within 2 h. This result demonstrates that the modification of carbon nitride improves its nitrogen fixation effect, and the introduction of oxygen vacancy-induced In 2 O 3 improves the light absorption performance and is advantageous to the separation of photogenerated charge carriers.
研究领域:
材料科学
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环境科学
·
化学
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DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Linlin Yang,Yizhe Dong,Dong Zhao,Xiangyu Li,Jiajie He,Tin Pou Lai,Enze Zhou,Toshiyuki Ueki,Yixing Li,Xiangying Meng,Liyun Zhang,Bin Yu,Wenli Pei,Yongqiang Fan,Tingyue Gu,Fuhui Wang,Dake Xu
Biohydrogen production offers a promising pathway for developing clean and renewable energy sources. However, its practical application has been hindered by low efficiency and sustainability issues. Here, it is introduced an energy-efficient and output-sustainable hybrid system (LPBC/CH system) for biohydrogen production by integrating self-assembling intermetallic ( L 1 0 ) FePt@polypyrrole nanobiocatalysts (LPBC) with Clostridium pasteurianum . The engineered LPBC, characterized by optimal atomic structures and defined electronic properties, demonstrates robust transcriptional enhancement efficiency and biocatalytic capability, leading to an ≈103% increase in hydrogen production rate and a 57% enhancement in hydrogen yield to the bare C. pasteurianum system. Within the LPBC/CH system, the nanobiocatalysts target NADH and [FeFe] hydrogenase, triggering efficient tandem biocatalytic reactions for proton reduction. Notably, the LPBC achieves sustained performance for at least 30 days – a benchmark unmatched by other reported nanobiocatalysts. This study not only advances the frontiers of biohydrogen production but also establishes a universal framework for constructing hybrid systems with superior efficiency and sustainability.
研究领域:
生物制氢
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纳米技术
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生物催化
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合成生物学
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能源可持续性
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电化学
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微生物生物技术
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产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Haoyang Fu,Meirong Li,Qianyu Xu,Guoliang Chen,Yunjie Zou,Weixian Zhang,Shuzhou Li,Lan Ling
Downsizing supported metal of Fe 0 -based materials in dealing with ever-growing pharmaceutical contamination issues are highly desired but still challenging. Herein, we develop a modular design protocol to synthesize a family of ultrafine alloy nanoclusters embedded in a nitrogen-enriched carbon framework (NEC@FeM (M=Pd, Pt, Au)). Engineering the fine structure of nitrogen-enriched carbon and interfacial interaction with bimetallic nanoclusters largely suppresses bimetallic overgrowth, eventually producing supported ultrafine (< 4 nm), highly dispersed, well-alloyed nanoclusters. The alloying Fe 0 with M for ultrafine nanoclusters optimize the electron flow, chemical stability, and catalytic property, resulting in the obtained NEC@FeM exhibiting excellent doxorubicin (DOX) degradation performance. Density functional theory calculation combined with experimental results attribute the outstanding DOX degradation ability of NEC@FePd originally to the synergistic effect of enhanced DOX affinity and efficient electrons transfer from Fe to DOX. This work provides a paradigm for the design of ultrafine Fe 0 -based nanocluster with application in pollution control.
研究领域:
材料科学
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环境科学
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纳米技术
·
药物化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）