APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Jie Tang,Xiuhua Li,Yunfei Ma,Naizhang Xu,Yubing Liu,Qitao Zhang
Constructing composite semiconductor photocatalysts with intimate interfacial contact is crucial for efficient charge separation and surface reaction kinetics towards enhancing hydrogen evolution via photocatalytic water splitting. In this work, an in-situ interfacial P-Ni-P coordination strategy for band modulation and interfacial engineering of the Ni 2 P/P-PCN system is reported based on interstitial doping P and coupled Ni 2 P cocatalysts. As a non-noble metal composite catalyst, Ni 2 P/P-PCN displayed a photocatalytic hydrogen evolution rate (HER) of 1250 μmol h −1 g −1 , which was 1.4 times higher than that of Pt/P-PCN. The experimental characterization and theoretical calculation results showed that P dopant atoms at the P-PCN interface were coupled with Ni 2 P via interfacial P-Ni-P bonds. These acted as electron bridges that provided electron transfer channels at the interface, which greatly improved the interfacial compatibility between P-PCN and Ni 2 P. Combinedly, these effects promoted the rapid separation and transfer of photogenerated carriers. Thus, Ni 2 P/P-PCN can potentially replace Pt as a noble-metal-free cocatalyst for efficient synergistic HER under visible light irradiation.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Ning Song,Shihuan Hong,Mengya Xiao,Yan Zuo,Enhui Jiang,Chunmei Li,Hongjun Dong
The application of NiCo-LDHs in the hydrogen evolution reaction (HER) is rarely reported because it is usually served as an effective electrocatalyst for oxygen evolution reaction (OER) owing to the essential chemical and electric structure features. It still is a challenge to realize the effective HER over NiCo-LDHs unless modified with noble metals . In this work, the noble-metal-free core–shell Co(OH) 2 @P-NiCo-LDH hybrid with dodecahedral hierarchical structure is prepared by the sacrificial template method along with subsequent phosphating process, which is available for the electrocatalytic HER. The fabricated Co(Ni) δ+ -P δ- bonding states on the surface of outer shell NiCo-LDH not only provide the abundant active centers but also reduce interfacial charge transfer resistance to enhance the HER activity. Meanwhile, the unique core–shell dodecahedral structure effectively avoids the agglomeration and restacking of NiCo-LDH nanosheets to improve the electrochemical stability. This work exploits a novel noble-metal-free modification strategy to expand the application of NiCo-LDH in HER.
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Microbial Cell Factories
·
2017
·Vol. 16
·期 1
·1-10
·
IF 3.681
Zhang Hui,Li Mengya,Li Jie,Wang Guangli,Liu Yuan
Quizalofop- p -ethyl (QPE) is a post-emergence herbicide that effectively controls grass weeds and is often detected in the environment. However, the biochemical and molecular mechanisms of QPE degradation in the environment remains unclear. In this study, a highly effective QPE-degrading bacterial strain J-2 was isolated from acclimated activated sludge and identified as a Pseudomonas sp., containing the QPE breakdown metabolite quizalofop acid (QA) identified by Liquid Chromatography-Ion Trap-Mass Spectrometry (LC-IT-MS n ) analysis. A novel QPE hydrolase esterase-encoding gene qpeH was cloned from strain J-2 and functionally expressed in Escherichia coli BL21 (DE3). The specific activity of recombinant QpeH was 198.9 ± 2.7 U mg −1 for QPE with K
m
and K
cat
values of 41.3 ± 3.6 μM and 127.3 ± 4.5 s −1 . The optimal pH and temperature for the recombinant QpeH were 8.0 and 30 °C, respectively and the enzyme was activated by Ca 2+ , Cd 2+ , Li + , Fe 3+ and Co 2+ and inhibited by Ni 2+ , Fe 2+ , Ag + , DEPC, SDS, Tween 80, Triton X, β-mercaptoethanol, PMSF, and pCMB. In addition, the catalytic efficiency of QpeH toward different AOPP herbicides in descending order was as follows: fenoxaprop-P-ethyl > quizalofop-P-tefuryl > QPE > haloxyfop-P-methyl > cyhalofopbutyl > clodinafop-propargyl. On the basis of the phylogenetic analysis and multiple sequence alignment, the identified enzyme QpeH, was clustered with esterase family V, suggesting a new member of this family because of its low similarity of amino acid sequence with esterases reported previously.
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RSC Advances
·
2019
·Vol. 9
·期 35
·20323-20331
·
IF 3.049
Jiangkun Du,Yang Wang,Faheem,Tiantian Xu,Han Zheng,Jianguo Bao
H2O2 and persulfate (PDS) activated by iron are attracting much attention due to their strong oxidation capacity for the effective degradation of organic pollutants. However, they face problems such as requiring an acidic reaction pH and difficulty of Fe2+ regeneration. In this study, the simultaneous activation of H2O2 and persulfate by nanoscaled zero valent iron (nZVI) was investigated for the degradation of p-nitrophenol (PNP). The nZVI/H2O2/PDS oxidation system exhibited significantly higher reactivity toward PNP degradation than the systems with a single oxidant. A synergistic effect was explored between H2O2 and PDS during nZVI-mediated activation, and the molar ratio of H2O2/PDS was a key parameter in optimizing the performance of PNP degradation. The nZVI/H2O2/PDS system could function well in a wide pH range, and even 95% PNP was removed at an initial pH 10, thus markedly alleviating the pH limitations of Fenton-like processes. Both hydroxyl radicals and sulfate radicals could be identified during H2O2/PDS activation, in which H+ produced during PDS decomposition promoted H2O2 activation. The increase of oxidant concentration could significantly enhance the PNP degradation, while the presence of HCO3− and HPO42− exerted great inhibition. Furthermore, five degradation intermediates of PNP were detected and its degradation pathways in the nZVI/H2O2/PDS system were presented. This study reveals that the simultaneous activation of H2O2 and PDS by nZVI is a promising advanced oxidation tool as an alternative to typical Fenton processes for recalcitrant pollutant removal.
研究领域:
环境科学
·
化学工程
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 21.1
You Xu,Huizhen Wang,Jiabing Geng,Yufeng Yuan,Kai Deng,Hongjie Yu,Ziqiang Wang,Hongjing Wang,Liang Wang
Electrosynthesis of cyclohexanone oxime (CYCO) from nitrite (NO 2 ⁻) and cyclohexanone (CYC) offers a sustainable alternative for green CYCO production. However, precise control of the NO 2 ⁻ reduction pathway to generate *NH 2 OH intermediates while suppressing CYC/CYCO hydrogenation and hydrogen evolution reaction remains challenging. Here, an intermetallic PdInBi metallene ( i -PdInBiene) catalyst was designed for CYCO electrosynthesis, achieving nearly 100% yield and an optimal Faradaic efficiency of 40.73 ± 2.74%. Combination of in situ characterizations with theoretical calculations reveal that the asymmetric p-d-p orbital hybridization in atomic-scale ordered configuration could regulate the local electronic structure of active sites and induce short pathway-hydrogen spillover. The *H modulation over specific active sites favors the selective reduction of NO 2 ⁻ to *NH 2 OH, promotes its spontaneous coupling with CYC to produce CYCO, while suppressing undesired side reactions. The system’s economic feasibility and broad substrate applicability further highlight its potential as a mild, sustainable strategy for oxime electrosynthesis.
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Journal of Physical Chemistry Letters
·
2026
·Vol. 17
·期 33
·9746-9755
·
IF 4.5
Lan Zhineng,Wan Meng,Yan Huilin,Huang Hao,Liu Benyu,Lu Yi,Yang Yingying,Suo Yi,Zhang Guanzheng,Du Shuxian,Zhang Qiang,Wang Zhiwei,Jiang Tongtong,Sun Changxu,Qu Shujie,Yan Luyao,Cui Peng,Li Meicheng
Stability degradation plagues both
regular n-i-p and inverted p-i-n
perovskite solar cells (PSCs), with the organic hole transport layer
(HTL) constituting a key restricting factor. Poly(triarylamine) (PTAA)
possesses intrinsic polymer characteristics and excellent thermal
stability, rendering it a competitive candidate for high-performance
PSCs applicable to both device structures. However, challenging p-doping
procedures and vulnerability to humidity restrict its utilization.
Herein, we introduced a hydrophobic dilauroyl peroxide (DP) with oxidation
ability and a long-chain alkanes structure into the PTAA. Upon cleavage
of the peroxide bond (−O–O−) of DP, two decanoyl
free radicals are generated. These radicals seize the lone pair of
electrons on the N atom of the triarylamine in PTAA, oxidizing PTAA
into a positively charged radical PTAA •+ , thereby
achieving p-type doping of PTAA. This doping process enhances the
electrical properties and transport characteristics of PTAA. Besides,
the introduction of long-chain alkyl groups enhances the hydrophobicity
of the PTAA film, increasing the water contact angle from 60.18 °
to 80.39 ° . As a result, the champion PCE of n-i-p PSCs increased
from 23.49% to 24.82%, while that of p-i-n PSCs increased from 25.26%
to 26.04%. Moreover, the humidity stability and thermal stability
of the PSCs are enhanced. As a result, after the PSC aged for approximately
4752 h at 25 ° C and 45% relative humidity, it still maintained
97% of its initial PCE.
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INFLAMMATION
·
2022
·Vol. 46
·期 2
·534-554
·
IF 4.657
Tong He,Wang Li,Zhang Kefan,Shi Jing,Wu Yongshuai,Bao Yulong,Wang Changshan
Noninfectious liver injury, including the effects of chemical material, drugs and diet, is a major cause of liver diseases worldwide. In chemical and drugs-induced liver injury, innate inflammatory responses are mediated by extracellular danger signals. The S100 protein can act as danger signals, which can promote the migration and chemotaxis of immune cells, promote the release of various inflammatory cytokines, and regulate the body’s inflammatory and immune responses. However, the role of S100A6 in inflammatory response in chemical and drugs-induced sterile liver injury remains unclear. We constructed the model of sterile liver injury induced by carbon tetrachloride (CCl 4 )/Paracetamol (APAP) and performed RNA sequencing (RNA-seq) on the liver tissues after injury (days 2 and 5). We analyzed inflammatory protein secretion in the liver tissue supernatant by enzyme-linked immunosorbent assay (ELISA), determined the inflammation response by bioinformatic analysis during sterile liver injury, and assessed mononuclear/macrophage infiltration by immunohistochemistry and flow cytometry. Immunohistochemistry was used to analyze the location of S100A6. We conducted inflammatory factor expression analysis and molecular mechanistic studies in Kupffer cells (KCs) induced by S100A6 using quantitative reverse transcription-polymerase chain reaction (qRT-PCR), ELISA, and western blot in vitro experiments. We performed chemokine CCL2 expression analysis and molecular mechanism studies using the same method. We used a Transwell assay to show the infiltration of mononuclear/macrophage. We here observed that aggravated inflammatory response was shown in CCl 4 and APAP-administrated mice, as evidenced by enhanced production of inflammatory cytokines (TNF-α, IL-1β), and elevated mononuclear/macrophage infiltration and activation of immunity. The expression of S100A6 was significantly increased on day 2 after sterile liver injury, which is primarily produced by injured liver cells. Mechanistic studies established that S100A6 activates Kupffer cells (KCs) via the p -P38, p -JNK and P65 pathways to induce inflammation in vitro . Furthermore, TNF-α can stimulate liver cells via the p -P38 and p -JNK pathways to produce CCL2 and promote the infiltration of mononuclear/macrophage. In summary, we showed that S100A6 plays an important role in regulating inflammation, thus influencing sterile liver injury. Our findings provide novel evidence that S100A6 can as a danger signal that contributes to pro-inflammatory activation through p -P38 and p -JNK pathways in CCl 4 and APAP-induced sterile liver injury in mice. In addition, the inflammatory factor TNF-α induces a large amount of CCL2 production in normal liver cells surrounding the injured area through a paracrine action, which is chemotactic for blood mononuclear/macrophage infiltration. Graphical Abstract
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Arabian Journal of Chemistry
·
2017
·
IF 4.553
Peiling Shi,Rui Xue,Yuli Wei,Xi Lei,Jiebing Ai,Ting Wang,Zheru Shi,Xiao Wang,Qin Wang,Fathelrahman Mohammed Soliman,Hao Guo,Wu Yang
A novel electrochemical platform was designed and prepared for simultaneous determination of p-acetaminophen (AMP) and p-aminophenol (AP) by combining the excellent conductivity and electrocatalytic activities of tetraaminophenyl porphyrin functionalized multi-walled carbon nanotubes (CNTs-CONH-TAPP) and gold nanoparticles (AuNPs). The as-synthesized CNTs-CONH-TAPP composites were characterized by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and scanning electron microscope. The incisive oxidation current responses of AMP and AP at the modified electrode promised a sensitive and selective simultaneous determination of AMP and AP. Under optimized conditions, the peak currents were directly proportional to the concentrations of AMP and AP over the ranges of 4.5–500 μmol L −1 and 0.08–60 μmol L −1 , respectively, and the limits of detection were 0.44 μmol L −1 for AMP and 0.025 μmol L −1 for AP(S/N = 3) respectively. The proposed modified electrode showed excellent selectivity, reproducibility and long-term stability and could be applied in simultaneous determination of p-acetaminophen and p-aminophenol in real samples.
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APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Hailong Hu,Jingguang Zhu,Maosheng Chen,Tailiang Guo,Fushan Li
High-performance inkjet-printed nickel oxide thin-film transistors (TFTs) with Al 2 O 3 high-k dielectric have been fabricated using a sol-gel precursor ink. The “coffee ring” effect during the printing process was facilely restrained by modifying the viscosity of the ink to control the outward capillary flow. The impacts on the device performance was studied in detail in consideration of annealing temperature of the nickel oxide film and the properties of dielectric layer. The optimized switching ability of the device were achieved at an annealing temperature of 280 °C on a 50-nm-thick Al 2 O 3 dielectric layer, with a hole mobility of 0.78 cm 2 /V·s, threshold voltage of −0.6 V and on/off current ratio of 5.3 × 10 4 . The as-printed p-type oxide TFTs show potential application in low-cost, large-area complementary electronic devices.
研究领域:
材料科学
·
电子工程
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Synthetic and Systems Biotechnology
·
2026
·
IF 4.8
Xiaoru Zuo,Huizhi Zhang,Zhanwei Zhang,Yuanyuan Ma,Chuanbo Zhang,Wenyu Lu
The cyclic monoterpene p -menthane-3,8-diol exhibits highly effective mosquito-repellent activity. Current industrial production of PMD depends on chemically synthesized citronellal as a precursor. To provide a green, sustainable alternative for citronellal supply, we engineered a Saccharomyces cerevisiae strain for efficient de novo biosynthesis of citronellal. By enhancing geraniol synthesis, systematically redesigning the endogenous oxidoreductase system, and implementing metabolic optimization strategies, a citronellal titer of 0.13 g/L was achieved in shake-flask cultivation. By integrating this microbial fermentation step with subsequent chemical catalysis, we established a biological–chemical method for PMD production, achieving a final PMD yield of 0.64 g/L. This work represents the first semisynthetic route from glucose to PMD via a biological-chemical method, offering a novel and sustainable paradigm for PMD manufacture.
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RSC Advances
·
2019
·Vol. 9
·期 67
·39180-39186
·
IF 3.049
Yu He,Fengqi Lu,Xiaojun Kuang
All-solid-state sodium-ion batteries are promising candidates for renewable energy storage applications, owing to their high safety, high energy density, and the abundant resources of sodium. The critical factor for an all-solid-state battery is having a sodium solid electrolyte that has high Na ion conductivity at room temperature and outstanding thermal stability, low flammability, and long battery lifespan. Herein, a new Na ion solid-state electrolyte, Na3VS4, is prepared by a solid state reaction. It shows conductivity of ∼1.16 × 10−8 to 1.46 × 10−6 S cm−1 from 25 to 100 °C. The sodium ion conductivity was enhanced to ∼1.49 × 10−7 to 1.20 × 10−5 S cm−1 through P substitution for V in the composition Na3P0.1V0.9S4. Such sodium ion conduction enhancement could be attributed to P substitution for V leading to a wider Na migration path and the generation of sodium vacancies.
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Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 48
·25378-25384
·
IF 8.867
Tanyuan Wang,Chao Wang,Yue Jin,Anna Sviripa,Jiashun Liang,Jiantao Han,Yunhui Huang,Qing Li,Gang Wu
Transition metal phosphides are often studied as hydrogen evolution reaction cathode catalysts, but scarcely as oxygen evolution reaction (OER) anode catalysts for water oxidation. Herein, we report a new amorphous Co0.63Fe0.21P0.16 OER catalyst, which was prepared through a one-step solvothermal process. This catalyst exhibits extraordinary OER catalytic activity in alkaline media and is superior to the state of the art IrO2 in 1.0 M KOH, capable of yielding a current density of 10 mA cm−2 at an overpotential of only 217 mV. This newly achieved high activity outperforms most reported transition metal phosphide catalysts. During the OER, the surface layers of the Co0.63Fe0.21P0.16 nanospheres (200–500 nm) are oxidized, which show the typical Tafel slope of oxides around 40 mV dec−1. The in situ formation of surface Co oxides in the catalysts during the OER along with an optimal doping of Fe are found to be crucial for their remarkable activity. In particular, the metal-rich amorphous phosphide cores, i.e., substrates, probably contribute to OER performance of the catalysts due to their high electrical conductivity. This new type of surface oxidized amorphous transition metal phosphide would provide a new pathway for the design of high-performance OER electrocatalysts.
研究领域:
材料科学
·
电化学
·
催化
·
能量转换
·
纳米材料
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危险品化学品经营许可证（带存储）