Constructing broad spectrum response ROQDs/Bi2WO6/CQDs heterojunction nanoplates: Synergetic mechanism of boosting redox abilities for photocatalytic degradation pollutant

2021 ◽  
pp. 105674
Author(s):  
Hongquan Jiang ◽  
Jianzhe Sun ◽  
Shuying Zang ◽  
Lige Gong ◽  
Lan Feng
Keyword(s):  
Photocatalytic Degradation ◽  
Broad Spectrum ◽  
Spectrum Response

scholarly journals Molecular basis for high ligand sensitivity and selectivity of strigolactone receptors in Striga

2021 ◽  
Author(s):  
Yupei Wang ◽  
Ruifeng Yao ◽  
Xiaoxi Du ◽  
Lvjun Guo ◽  
Li Chen ◽  
...  
Keyword(s):  
Broad Spectrum ◽  
Binding Pocket ◽  
Striga Hermonthica ◽  
High Affinity ◽  
Low Concentrations ◽  
Sensitivity And Selectivity ◽  
F Box Protein ◽  
High Ligand ◽  
Spectrum Response

Abstract Seeds of the root parasitic plant Striga hermonthica can sense very low concentrations of strigolactones (SLs) exuded from host roots. The S. hermonthica HYPOSENSITIVE TO LIGHT (ShHTL) proteins are putative SL receptors, among which ShHTL7 reportedly confers sensitivity to picomolar levels of SL when expressed in Arabidopsis thaliana. However, the molecular mechanism underlying ShHTL7 sensitivity is unknown. Here we determined the ShHTL7 crystal structure and quantified its interactions with various SLs and key interacting proteins. We established that ShHTL7 has an active-site pocket with broad-spectrum response to different SLs and moderate affinity. However, in contrast to other ShHTLs, we observed particularly high affinity of ShHTL7 for F-box protein AtMAX2. Furthermore, ShHTL7 interacted with AtMAX2 and with transcriptional regulator AtSMAX1 in response to nanomolar SL concentration. ShHTL7 mutagenesis analyses identified surface residues that contribute to its high-affinity binding to AtMAX2 and residues in the ligand binding pocket that confer broad-spectrum response to SLs with various structures. Crucially, yeast-three hybrid experiments showed that AtMAX2 confers responsiveness of the ShHTL7–AtSMAX1 interaction to picomolar levels of SL, in line with the previously reported physiological sensitivity. These findings highlight the key role of SL-induced MAX2-ShHTL7-SMAX1 complex formation in determining the sensitivity to SL. Moreover, these data suggest a strategy to screen for compounds that could promote suicidal seed germination at physiologically relevant levels.

0D/2D plasmonic Cu2-xS/g-C3N4 nanosheets harnessing UV-vis-NIR broad spectrum for photocatalytic degradation of antibiotic pollutant

2020 ◽  
Vol 263 ◽  
pp. 118326 ◽  
Author(s):  
Liang Zhou ◽  
Zhihang Liu ◽  
Zhipeng Guan ◽  
Baozhu Tian ◽  
Lingzhi Wang ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Broad Spectrum

scholarly journals N,Cu-CD-Decorated Mesoporous WO3 for Enhanced Photocatalysis Under UV–Vis–NIR Light Irradiation

2021 ◽  
Vol 8 ◽  
Author(s):  
Tianjun Ni ◽  
Qiansheng Li ◽  
Yunhui Yan ◽  
Zhijun Yang ◽  
Kaiwen Chang ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Electron Transfer ◽  
Broad Spectrum ◽  
Environmental Remediation ◽  
Oxygen Vacancies ◽  
Photocatalytic Reaction ◽  
Electron Hole ◽  
Nir Light ◽  
Response Light ◽  
Spectrum Response

Research on the design of semiconductor photocatalysts with rapid electron transfer efficiencies and broad-spectrum responses for environmental remediation remains a pressing challenge. Herein, we described the fabrication of a novel broad-spectrum nitrogen and copper codoped carbon dots/mesoporous WO3 nanocomposite (N,Cu-CDs/m-WO3), which exhibited complete UV–vis–NIR spectrum response, light harvesting capabilities, rich oxygen vacancies, rapid electron-transfer ability, low electron–hole (e−/h+) pair recombination rate, and extensive specific surface area. After 2 h of photocatalytic reaction, it showed excellent photoactivities for the degradation of rhodamine B, methylene blue, tetracycline hydrochloride, oxytetracycline, ciprofloxacin, and bisphenol A. Moreover, we found that the conversion between Cu (II) and Cu (I) played a key role in accelerating electron transfer and inhibiting the recombination of e−/h+ pairs. This work provides an efficient strategy for the utilization of solar light and enhancing the charge-transfer capacity in the semiconductor photocatalysis field.

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