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| 1 | Roles of manganese oxides in degradation of phenol under UV-Vis irradiation:Adsorption,oxidation,and photocatalysis显示文摘Manganese oxides are known as one type of semiconductors,but their photocatalysis characteristics have not been deeply explored.In this study,photocatalytic degradation of phenol using several synthesized manganese oxides,i.e,acidic birnessite (BIR-H),alkaline birnessite (BIR-OH),cryptomelane (CRY) and todorokite (TOD),were comparatively investigated.To elucidate phenol degradation mechanisms,X-ray diffraction (XRD),ICP-AES (inductively coupled plasma-atomic emission spectroscopy),TEM (transmission electronic microscope),N 2 physisorption at 77 K and UV-visible diffuse reflectance spectroscopy (UV-Vis DRS) were employed to characterize the structural,compositional,morphological,specific surface area and optical absorption properties of the manganese oxides.After 12 hr of UV-Vis irradiation,the total organic carbon (TOC) removal rate reached 62.1%,43.1%,25.4%,and 22.5% for cryptomelane,acidic birnessite,todorokite and alkaline birnessite,respectively.Compared to the reactions in the dark condition,UV- Vis exposure improved the TOC removal rates by 55.8%,31.9%,23.4% and 17.9%.This suggests a weak ability of manganese oxides to degrade phenol in the dark condition,while UV-Vis light irradiation could significantly enhance phenol degradation.The manganese minerals exhibited photocatalytic activities in the order of:CRY > BIR-H > TOD > BIR-OH.There may be three possible mechanisms for photochemical degradation:(1) direct photolysis of phenol;(2) direct oxidation of phenol by manganese oxides;(3) photocatalytic oxidation of phenol by manganese oxides.Photocatalytic oxidation of phenol appeared to be the dominant mechanism. | Qin Zhang Xiaodi Cheng Chen Zheng Xionghan Feng Guohong Qiu Wenfeng Tan Fan Liu | 2011 | Journal of Environmental Sciences2011，23，11： | 11 |
| 2 | Silicon-coated fibrous network of carbon nanotube/iron towards stable and wideband electromagnetic wave absorption显示文摘Materials that can absorb electromagnetic(EM)wave have garnered increased attention in recent years due to their potential to mitigate the ever increasing environmental pollution by EM waves.Thanks to recent advances in micro/nanofabrication,a variety of magnetic metal-based EM absorbers have been reported.The design and synthesis of EM absorbers that exhibit efficient and wide-band absorption at small thicknesses,however,remains elusive.Here we report the design of fibrous nanostructures consisting of magnetic iron(Fe)nanoparticles and carbon nanotubes(CNTs),which exhibits a wide-band EM absorption(3.8 GHz)while maintain the thickness at 1.2 mm.In our work,we created a novel core-shell structure by immersing the highly fibrous CNT-Fe structure into solid-state silicon(SiO)matrix.Finally,the SiO-coated CNT-Fe structures exhibit good stability against air-induced oxidation and acid corrosion while maintaining high EM absorption.Overall,the results reported in this study present new avenues to absorb EM from ambient air.We believe that our work elevates the utility of EM absorbers to real-world applications such as anti-acid and oxidation ability. | Xiaodi Zhou He Han Yuchao Wang Cheng Zhang Hualiang Lv Zhichao Lou | 2022 | Journal of Materials Science & Technology2022，，26： | 4 |
| 3 | A Superaerophobic Bimetallic Selenides Heterostructure for Efficient Industrial-Level Oxygen Evolution at Ultra-High Current Densities显示文摘Cost-effective and stable electrocatalysts with ultra-high current densities for electrochemical oxygen evolution reaction(OER)are critical to the energy crisis and environmental pollution.Herein,we report a superaerophobic three dimensional(3D)heterostructured nanowrinkles of bimetallic selenides consisting of crystalline NiSe2 and NiFe2Se4 grown on NiFe alloy(NiSe2/NiFe2Se4@NiFe)prepared by a thermal selenization procedure.In this unique 3D heterostructure,numerous nanowrinkles of NiSe2/NiFe2Se4 hybrid with a thickness of ~100 nm are grown on NiFe alloy in a uniform manner.Profiting by the large active surface area and high electronic conductivity,the superaerophobic NiSe2/NiFe2Se4@NiFe heterostructure exhibits excellent electrocatalytic activity and durability towards OER in alkaline media,outputting the low potentials of 1.53 and 1.54 V to achieve ultra-high current densities of 500 and 1000 mA cm^−2,respectively,which is among the most active Ni/Fe-based selenides,and even superior to the benchmark Ir/C catalyst.The in-situ derived FeOOH and NiOOH species from NiSe2/NiFe2Se4@NiFe are deemed to be efficient active sites for OER. | Jiaxin Yuan Xiaodi Cheng Hanqing Wang Chaojun Lei Sameer Pardiwala Bin Yang Zhongjian Li Qinghua Zhang Lecheng Lei Shaobin Wang Yang Hou | 2020 | Nano-Micro Letters2020，12，8： | 4 |
| 4 | Bimetallic Oxyhydroxide as a High-Performance Water Oxidation Electrocatalyst under Industry-Relevant Conditions显示文摘Developing high-performing oxygen evolution reaction(OER)electrocatalysts under high-current operation conditions is critical for future commercial applications of alkaline water electrolysis for clean energy generation.Herein,we prepared a three-dimensional(3D)bimetallic oxyhydroxide hybrid grown on a Ni foam(NiFeOOH/NF)prepared by immersing Ni foam(NF)into Fe(NO_(3))_(3) solution.In this unique 3D structure,the NiFeOOH/NF hybrid was composed of crystalline Ni(OH)_(2) and amorphous FeOOH evenly grown on the NF surface.As a bimetallic oxyhydroxide electrocatalyst,the NiFeOOH/NF hybrid exhibited excellent catalytic activity,surpassing not only the other reported Ni–Fe based electrocatalysts,but also the commercial Ir/C catalyst.In situ electrochemical Raman spectroscopy demonstrated the active FeOOH and NiOOH phases involved in the OER process.Profiting from the synergy of Fe and Ni catalytic sites,the NiFeOOH/NF hybrid delivered an outstanding OER performance under challenging industrial conditions in a 10.0 mol·L^(-1) KOH electrolyte at 80℃,requiring potentials as small as 1.47 and 1.51 V to achieve the super-high catalytic current densities of 100 and 500mA∙cm^(-2),respectively. | Jiaxin Yuan Xiaodi Cheng Chaojun Lei Bin Yang Zhongjian Li Kun Luo K.H.Koko Lam Lecheng Lei Yang Hou Kostya Ken Ostrikov | 2021 | Engineering2021，7，9： | 1 |
| 5 | Is sodium percarbonate a good deltamethrin choice in situ remediation of pollution?显示文摘 | Xu Zhang Baigang Ren Shangge Li Xiaodi Qu Huanhuan Yang Shiguo Xu Zongming Ren Qiang Kong Cheng Wang | 2017 | Frontiers of Environmental Science & Engineering2017，11，3： | 1 |
| 6 | Isorhamnetin protects zearalenone-induced damage via the PI3K/Akt signaling pathway in porcine ovarian granulosa cells显示文摘Zearalenone(ZEA)is widely derived from moldy cereal grain,which has adverse effects on animal reproduction.In particular,pigs are more sensitive to ZEA-induced toxicity than other animals.Isorhamnetin has extensive pharmacological activity.However,the role of isorhamnetin in ZEA-induced cytotoxicity remains unclear.This study was designed to investigate the therapeutic effect of isorhamnetin on ZEA-induced damage in porcine ovarian granulosa cells and elucidate its molecular mechanism.Two experiments were conducted,where a minimum of 3 biological replicates were used for each treatment.In Exp.1,ovarian granulosa cells were treated with different concentrations of isorhamnetin(1,5,10,20 and 30μmol/L)and ZEA(0,10,30,60,90 and 120μmol/L)for 24 h.Our results indicated that 60μmol/L ZEA(half-maximal inhibitory concentration value)and 20μmol/L isorhamnetin(the most effective concentration against ZEA-induced cytotoxicity)were optimum concentrations.In Exp.2,ovarian granulosa cells were treated with isorhamnetin(20μmol/L)for 2 h,before treatment with ZEA(60μmol/L)for 24 h.Apoptosis,endoplasmic reticulum stress,oxidative stress,proliferation and hormone secretion of ovarian granulosa cells were detected.Our findings showed that isorhamnetin suppressed(P<0.05)ZEA-induced apoptosis by altering mitochondrial membrane potential and apoptosis-related proteins(B-cell lymphoma-2[Bcl-2],Bcl2-associated x[Bax]and cleaved caspase-3[C-Casp3]).Changes in intracellular Ca2+levels and C/EBP homologous protein(CHOP),recombinant activating transcription factor 6(ATF6),glucose regulated protein78 k D(GRP78)indicated that isorhamnetin rescued(P<0.05)ZEA-induced endoplasmic reticulum stress.Furthermore,isorhamnetin prevented(P<0.05)ZEA-induced oxidative stress via the mitogen-activated protein kinase(P38)signaling pathway.Mechanistically,isorhamnetin stimulated(P<0.05)the expression of proliferating cell nuclear antigen(PCNA)and cyclin D,thereby increasing the ratio of S phase cells in response to ZEAinduced apoptosis via phosphatidylinositol 3 kinase/protein kinase B(PI3K/Akt)signaling pathway.Isorhamnetin also recovered(P<0.05)ZEA-induced steroidogenesis disorder by regulating steroidogenic enzyme gene and proteins(follicle-stimulating hormone receptor[FSHR]and cytochrome P450 family 19subfamily a member 1[CYP19A1]).Collectively,these findings show that isorhamnetin protects ovarian granulosa cells from ZEA-induced damage,which promotes proliferation,alleviates apoptosis,endoplasmic reticulum stress,oxidative stress,and steroidogenesis disorder. | Xiaoya Li Huali Chen Zelin Zhang Jiaxin Duan Rongmao Hua Xiaodi Li Li Yang Jianyong Cheng Qingwang Li | 2022 | Animal Nutrition2022，，4： | 1 |
| 7 | Intramolecular Hydrogen Bond Improved Durability and Kinetics for Zinc‑Organic Batteries显示文摘Organic compounds have the advantages of green sustainability and high designability,but their high solubility leads to poor durability of zinc-organic batteries.Herein,a high-performance quinone-based polymer(H-PNADBQ)material is designed by introducing an intramolecular hydrogen bonding(HB)strategy.The intramolecular HB(C=O⋯N-H)is formed in the reaction of 1,4-benzoquinone and 1,5-naphthalene diamine,which efficiently reduces the H-PNADBQ solubility and enhances its charge transfer in theory.In situ ultraviolet-visible analysis further reveals the insolubility of H-PNADBQ during the electrochemical cycles,enabling high durability at different current densities.Specifically,the H-PNADBQ electrode with high loading(10 mg cm^(-2))performs a long cycling life at 125 mA g^(-1)(>290 cycles).The H-PNADBQ also shows high rate capability(137.1 mAh g^(−1)at 25 A g^(−1))due to significantly improved kinetics inducted by intramolecular HB.This work provides an efficient approach toward insoluble organic electrode materials. | Tianjiang Sun Jun Pan Weijia Zhang Xiaodi Jiang Min Cheng Zhengtai Zha Hong Jin Fan Zhanliang Tao | 2024 | Nano-Micro Letters2024，16，3： | 0 |
| 8 | Discovery of emerging organic pollutants in the atmosphere through an omics approach显示文摘Ambient air pollution,containing numerous known and hitherto unknown compounds,is a major risk factor for public health.The discovery of harmful components is the prerequisite for pollution control;however,this raises a great challenge on recognizing previously unknown species.Here we systematically review the analytical techniques on air pollution in the framework of an omics approach,with a brief introduction on sample preparation and analysis,and in more detail,compounds prioritization and identification.Through high-resolution mass spectrometry(HRMS,typically coupled with chromatography),the complicated environmental matrix can be digitalized into“fullcomponent”data.A key step to discover emerging compounds is the prioritization of compounds from massive data.Chemical fingerprints,suspect lists and biological effects are the most vital untargeted strategies for comprehensively screening critical and hazardous substances.Afterward,compressed data of compounds can be identified at various confidence levels according to exact mass and the derived molecular formula,MS libraries,and authentic standards.Such an omics approach on full-component data provides a paradigm for discovering emerging air pollutants;nonetheless,new technological advancements of instruments and databases are warranted for further tracking the environmental behaviors,hence to evaluate the health risk of key pollutants. | Zhen Cheng Xinghua Qiu Xiaodi Shi Xing Jiang Tong Zhu | 2023 | Frontiers of Environmental Science & Engineering2023，17，4： | 0 |
| 9 | Efficient electrocatalytic oxygen evolution at ultra-high current densities over 3D Fe,N doped Ni(OH)_(2) nanosheets显示文摘Developing highly efficient nickel or iron based hydroxide electrocatalysts is primary essential but challenging for oxygen evolution reaction(OER)at ultra-high current densities.Herein,we developed a facile method to prepare nitrogen and iron doped nickel(Ⅱ)hydroxide nanosheets on self-supported conductive nickel foam(denoted as Fe,N-Ni(OH)_(2)/NF)through ammonia hydrothermal and impregnation methods.Owing to the optimization of the electronic structure by nitrogen doping and the strong synergistic effect between Fe and Ni(OH)_(2),the three-dimensional(3 D)Fe,N-Ni(OH)_(2)/NF nanosheets delivered superior electrocatalytic OER performances in basic solution with low potentials of 1.57 V and1.59 V under 500 mA/cm^(2)and 1000 mA/cm^(2)respectively and robust operation for 10 h with ignored activity decay,comparing well with the potentials of previously reported NiFe based electrocatalysts as well as the benchmark commercial Ir/C/NF.In-situ Raman spectroscopy revealed that the main active species were NiOOH during the OER process.The present results are expected to provide new insights into the study of OER process towards ultra-high current densities. | Pu Shi Xiaodi Cheng Siliu Lyu | 2021 | Chinese Chemical Letters2021，32，3： | 0 |
| 10 | Study on Reducing Variance of Monte Carlo about Deep-penetration Problem Based on CADIS Method显示文摘The deep-penetration shielding problem is the problem which has a low result because of the deep shielding,the weak source or the small detector.With regard to the deep-penetration shielding problems in the Monte Carlo method,this paper takes advantage of the Consistent Adjoint Driven Importance Sampling(CADIS)method to reduce the variance of Monte Carlo code MCNP.At first,the adjoint flux is got through the multigroup/adjoint calculations.Then,the weight window parameter and the source biasing parameter are calculated by the formulas of the CADIS. | MA Xiaodi ZHOU Qi ZHU Qingfu CHENG Yuting | 2018 | 中国原子能科学研究院年报2018，，1： | 0 |
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