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| 1 | Efficient elimination of organic and inorganic pollutants by biochar and biochar-based materials显示文摘Biochar have received multidisciplinary attention because of their extraordinary physicochemical properties.In this review,the application of biochar and biochar-based materials for the efficient elimination of organic and inorganic pollutants are summarized.The sorption of organic chemicals and heavy metal ions/radionuclides,degradation/transformation of organic pollutants,and sorption-reduction-solidification of high-valent metal ions are described in detail.The interaction mechanism at molecular level from advanced spectroscopic techniques and theoretical calculations is discussed.Finally,the challenges in the application of biochar and biochar-supported materials in the immobilization of heavy metal ions and photocatalytic degradation of persistent organic pollutants in soils or wastewater are pointed out.This review is helpful for the graduate stu-dents to understand the recent works about biochar and biochar-supported materials in environmental pollutants management. | Baowei Hu Yuejie Ai Jie Jin Tasawar Hayat Ahmed Alsaedi Li Zhuang Xiangke Wang | 2020 | Biochar2020，2，1： | 18 |
| 2 | 二维有机-无机杂化钙钛矿:从材料性能到器件应用(英文)显示文摘二维(2D)钙钛矿材料(包括纯2D和准2D)是在传统意义上的三维钙钛矿晶格中插入大基团卤化铵形成的.在过去的20年里,二维钙钛矿材料种类不断丰富,相关理论研究不断深入,在光电器件领域的应用不断拓展.本综述介绍了2D钙钛矿材料的基本形成机制和性能,汇总和比较了2D钙钛矿薄膜的制备方法,并给出了其在太阳电池以及发光二极管领域的应用实例.最后,提出了该领域亟待解决的问题,以及未来的研究趋势. | 马爽 蔡墨朗 程泰 丁希宏 时小强 Ahmed Alsaedi Tasawar Hayat 丁勇 谭占鳌 戴松元 | 2018 | Science China Materials2018，61，10： | 18 |
| 3 | Application of graphene oxides and graphene oxide-based nanomaterials in radionuclide removal from aqueous solutions显示文摘With the fast development of nanoscience and nanotechnology,the nanomaterials have attracted multidisciplinary interests.The high specific surface area and large numbers of oxygen-containing functional groups of graphene oxides(GOs) make them suitable in the preconcentration and solidification of radionuclides from wastewater.In this paper,mainly based on the recent work carried out in our laboratory,the efficient elimination of radionuclides using GOs and GO-based nanomaterials as adsorbents are summarized and the interaction mechanisms are discussed from the results of batch techniques,surface complexation modeling,spectroscopic analysis and theoretical calculations.This review is helpful for the understanding of the interactions of radionuclides with GOs and GO-based nanomaterials,which is also crucial for the application of GOs and GO-based nanomaterials in environmental radionuclide pollution management and also helpful in nuclear waste management. | Xiangxue Wang Shujun Yu Jie Jin Hongqing Wang Njud S. Alharbi Ahmed Alsaedi Tasawar Hayat Xiangke Wang | 2016 | Science Bulletin2016，61，20： | 17 |
| 4 | Synthesis of ordered mesoporous carbonaceous materials and their highly efficient capture of uranium from solutions显示文摘An extremely effortless method was applied for successful synthesis of mesoporous carbonaceous materials(MCMs) using well-ordered mesoporous silica as template. Various characterizations(scanning electron microscopy(SEM), transmission electron microscopy(TEM), X-ray diffraction(XRD), Fourier transform infrared spectroscopy(FT-IR), Raman, X-ray photoelectron spectroscopy(XPS), Brunner-Emmet-Teller(BET) and Zeta potential) confirmed that MCMs had large surface area, uniform pore size distribution, and abundant oxygen-containing functional groups. The batch techniques were employed to study U(VI) adsorption on MCMs under a wide range of experiment conditions. The adsorption kinetics of U(VI) onto MCMs were well-fitted by pseudo-second-order kinetic model, indicating a chemisorption process. The excellent adsorption capacity of MCMs calculated from the Langmuir model was 293.95 mg g^(-1) at pH 4.0. The FT-IR and XPS analyses further evidenced that the binding of U(VI) onto MCMs was ascribed to the plentiful adsorption sites(–OH and –COOH groups) in the internal mesoporous structure, which could efficiently trap guest U(VI) ions. The results presented herein revealed that MCMs were ideal adsorbents in the efficient elimination of uranium or other lanthanides/actinides from aqueous solutions, which would play an important role in environmental pollution management application. | Chenlu Zhang Xing Li Zhongshan Chen Tao Wen Shuyi Huang Tasawar Hayat Ahmed Alsaedi Xiangke Wang | 2018 | Science China Chemistry2018，61，3： | 8 |
| 5 | Peristaltic flow in an asymmetric channel with convective boundary conditions and Joule heating显示文摘The peristaltic transport of viscous fluid in an asymmetric channel is concentrated. The channel walls exhibit convective boundary conditions. Both cases of hydrodynamic and magnetohydrodynamic(MHD) fluids are considered. Mathematical analysis has been presented in a wave frame of reference. The resulting problems are non-dimensionalized. Long wavelength and low Reynolds number approximations are employed. Joule heating effect on the thermal equation is retained. Analytic solutions for stream function and temperature are constructed. Numerical integration is carried out for pressure rise per wavelength. Effects of influential flow parameters have been pointed out through graphs. | Abbasi Fahad Munir Hayat Tasawar Ahmad Bashir | 2014 | Journal of Central South University2014，21，4： | 5 |
| 6 | 低温等离子体改性碳纳米管及其对U(Ⅵ)的吸附性能研究显示文摘采用低温等离子体法将O-磷酸乙醇胺(O-PEA)接枝到多壁碳纳米管表面(MWCNTs),并使用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、傅里叶变换红外光谱(FTIR)、X射线衍射(XRD)和拉曼光谱(Raman)表征改性前后的MWCNTs的物化性质.通过静态吸附实验研究改性碳纳米管对溶液中U(Ⅵ)的吸附容量,同时,还研究了吸附时间、pH、离子强度和温度对吸附性能的影响.结果表明,通过低温等离子体法改性后的MWCNTs(PTMWCNTs-4)对U(Ⅵ)的吸附性能最好,其吸附容量大约是未改性MWCNTs吸附量的3倍.改性后的MWCNTs吸附速率更快. PTMWCNTs-4对U(Ⅵ)的吸附在pH<7.0条件下不受离子强度影响,属于内层络合机理;而在pH>7.0条件下受离子强度影响,属于外层络合机理或离子交换.热力学数据表明,吸附过程放热且可自发进行.本文为U(Ⅵ)的有效去除提供了一种新型环保的改性方法. | 孙菊 王亚男 段升霞 Tasawar Hayat Ahmed Alsaedi 李家星 | 2019 | 中国科学:化学2019，49，1： | 5 |
| 7 | DYNAMICAL BEHAVIOR OF A STOCHASTIC HBV INFECTION MODEL WITH LOGISTIC HEPATOCYTE GROWTH显示文摘This paper is concerned with a stochastic HBV infection model with logistic growth. First, by constructing suitable stochastic Lyapunov functions, we establish sufficient conditions for the existence of ergodic stationary distribution of the solution to the HBVinfection model. Then we obtain sufficient conditions for extinction of the disease. The stationary distribution shows that the disease can become persistent in vivo. | 刘群 蒋达清 史宁中 Tasawar HAYAT Ahmed ALSAEDI | 2017 | Acta Mathematica Scientia2017，37，4： | 5 |
| 8 | Efficient elimination of environmental pollutants through sorption-reduction and photocatalytic degradation using nanomaterials显示文摘With the rapid development of industrial,large amounts of different inorganic and organic pollutants are released into the natural environments.The efficient elimination of environmental pollutants,i.e.,photocatalytic degradation of persistent organic pollutants into nontoxic organic/inorganic chemicals,in-situ solidification or sorption-reduction of heavy metal ions,is crucial to protect the environment.Nanomaterials with large surface area,active sites and abundant functional groups could form strong surface complexes with different kinds of pollutants and thereby could efficiently eliminate the pollutants from the aqueous solutions.In this review,wemainly focused on the recent works about the synthesis of nanomaterials and their applications in the efficient elimination of different organic and inorganic pollutants from wastewater and discussed the interaction mechanism from batch experimental results,the advanced spectroscopy techniques and theoretical calculations.The adsorption and the photocatalytic reduction of organic pollutants and the sorption/reduction of heavy metal ions are generally considered as the mainmethods to decrease the concentration of pollutants in the natural environment.This review highlights anew way for the real applications of novel nanomaterials in environmental pollution management,especially for the undergraduate students to understand the recent works in the elimination of different kinds of inorganic and organic chemicals in the natural environmental pollution management. | Njud SAlharbi Baowei Hu Tasawar Hayat Samar Omar Rabah Ahmed Alsaedi Li Zhuang Xiangke Wang | 2020 | Frontiers of Chemical Science and Engineering2020，14，6： | 5 |
| 9 | Nanoscale zero-valent iron/magnetite carbon composites for highly efficient immobilization of U(Ⅵ)显示文摘Nanoscale zerovalent iron/magnetic carbon(NZVI/MC) composites were successfully synthesized by simply calcining yellow pine and iron precursors. NZVI/MC pyrolyzed at 800°C(NZVI/MC800) had a higher percentage of NZVI and displayed better resistance to aggregation and oxidation of NZVI than samples prepared at other temperatures. The NZVI/MC800 material was applied for the elimination of U(Ⅵ) from aqueous solutions. The results suggested that the NZVI/MC800 displayed excellent adsorption capacity(203.94 mg/g)toward U(Ⅵ). The significant adsorption capacity and fast adsorption kinetics were attributed to the presence of well-dispersed NZVI, which could quickly reduce U(Ⅵ) into U(Ⅳ), trapping the guest U(Ⅳ) in the porous biocarbon matrix. The removal of U(Ⅵ) on the NZVI/MC samples was strongly affected by solution pH. The NZVI/MC samples also displayed outstanding reusability for U(Ⅵ) removal after multiple cycles. These findings indicate that NZVI/MC has great potential for remediation of wastewater containing U(Ⅵ). | Zhimin Lv Shimin Yang Lei Chen Ahmed Alsaedi Tasawar Hayat Changlun Chen | 2019 | Journal of Environmental Sciences2019，31，2： | 5 |
| 10 | Melting Heat in Radiative Flow of Carbon Nanotubes with Homogeneous-Heterogeneous Reactions显示文摘The present article provides mathematical modeling for melting heat and thermal radiation in stagnationpoint flow of carbon nanotubes towards a nonlinear stretchable surface of variable thickness. The process of homogeneousheterogeneous reactions is considered. Diffusion coefficients are considered equal for both reactant and autocatalyst.Water and gasoline oil are taken as base fluids. The conversion of partial differential system to ordinary differential system is done by suitable transformations. Optimal homotopy technique is employed for the solutions development of velocity, temperature, concentration, skin friction and local Nusselt number. Graphical results for various values of pertinent parameters are displayed and discussed. Our results indicate that the skin friction coefficient and local Nusselt number are enhanced for larger values of nanoparticles volume fraction. | Tasawar Hayat Khursheed Muhammad Taseer Muhammad Ahmed Alsaedi | 2018 | Communications in Theoretical Physics2018，69，4： | 4 |
| 11 | Synthesis of molybdenum disulfide/reduced graphene oxide composites for effective removal of Pb(Ⅱ) from aqueous solutions显示文摘In this work,a facile method was adopted to synthesize molybdenum disulfide/reduced graphene oxide(MoS_2/rGO) composites through an L-cysteine-assisted hydrothermal technique.The as-prepared MoS_2/rGO composites were firstly applied as adsorbents for efficient elimination of Pb(Ⅱ) ions.Batch adsorption experiments showed that the adsorption of Pb(Ⅱ) on MoS_2/rGO followed pseudo-second-order kinetic model well.The adsorption of Pb(Ⅱ) was intensely pH-dependent,ionic strength-dependent at pH < 9.0 and ionic strength-independent at pH > 9.0.The presence of humic acid(HA) enhanced Pb(Ⅱ)adsorption obviously.The MoS_2/rGO composites exhibited excellent adsorption capacity of384.16 mg g ~1 at pH 5.0 and T= 298.15 K,which was superior to MoS_2(279.93 mg g ~1) and many other adsorbents.The thermodynamic parameters suggested that the adsorption process of Pb(Ⅱ) on MoS_2/rGO composites was spontaneous(AG~θ < 0) and endothermic(AH~θ > 0).The interaction of Pb(Ⅱ) and MoS_2/rGO was mainly dominated by electrostatic attraction and surface complexation between Pb(Ⅱ) and oxygen-containing functional groups of MoS_2/rGO.This work highlighted the application of MoS_2/rGO as novel and promising materials in the efficient elimination of Pb(Ⅱ) from contaminated water and industrial effluents in environmental pollution management. | Yi Du Jian Wang Yidong Zou Wen Yao Jing Hou Liangshu Xia Anguo Peng Ahmed Alsaedi Tasawar Hayat Xiangke Wang | 2017 | Science Bulletin2017，62，13： | 4 |
| 12 | General hyperentanglement concentration for polarization- spatial-time-bin multi-photon systems with linear optics显示文摘 | Hong Wang Bao-Cang Ren Ai Hua Wang Ahmed Alsaedi Tasawar Hayat Fu-Guo Deng | 2018 | Frontiers of physics2018，13，5： | 4 |
| 13 | 新型高稳定二维/三维钙钛矿材料:引入铵阳离子对钙钛矿太阳电池性能的影响(英文)显示文摘钙钛矿太阳电池因其快速增长的效率而引起了广泛关注,但不稳定性极大的影响了它的实际应用.这里,我们首次将小尺寸的NH_4^+引入三维钙钛矿中,制备了新型的二维/三维混合钙钛矿材料.特别地,与文献报道的二维钙钛矿不同的是,新型的二维/三维混合钙钛矿是首个显示光学性能红移和带隙减少的.当n=9时,电池显示出优越的光伏性能,效率达到了18.25%,且具有可忽略的迟滞.封装的电池在标准的AM 1.5G光照下放置1000小时后,效率没有明显降低.在高湿度条件下老化1000小时,未封装的电池保持了90%的初始效率.这些发现为发展新型钙钛矿材料提供了指导,有助于获得高效稳定的二维钙钛矿太阳电池. | 郑海英 戴松元 周凯旋 刘国震 张兵 Ahmed Alsaedi Tasawar Hayat 潘旭 | 2019 | Science China Materials2019，62，4： | 4 |
| 14 | Darcy–Forchheimer Three-Dimensional Flow of Williamson Nanofluid over a Convectively Heated Nonlinear Stretching Surface显示文摘The present study elaborates three-dimensional flow of Williamson nanoliquid over a nonlinear stretchable surface. Fluid flow obeys Darcy–Forchheimer porous medium. A bidirectional nonlinear stretching surface generates the flow. Convective surface condition of heat transfer is taken into consideration. Further the zero nanoparticles mass flux condition is imposed at the boundary. Effects of thermophoresis and Brownian diffusion are considered. Assumption of boundary layer has been employed in the problem formulation. Convergent series solutions for the nonlinear governing system are established through the optimal homotopy analysis method(OHAM). Graphs have been sketched in order to analyze that how the velocity, temperature and concentration distributions are affected by distinct emerging flow parameters. Skin friction coefficients and local Nusselt number are also computed and discussed. | Tasawar Hayat Arsalan Aziz Taseer Muhammad Ahmed Alsaedi | 2017 | Communications in Theoretical Physics2017，67，9： | 3 |
| 15 | DYNAMICS OF A HEPATITIS B MODEL WITH SATURATED INCIDENCE显示文摘In this article, we present a hepatitis B epidemic model with saturated incidence.The dynamic behaviors of the deterministic and stochastic system are studied. To this end, we first establish the local and global stability conditions of the equilibrium of the deterministic model. Second, by constructing suitable stochastic Lyapunov functions, the sufficient conditions for the existence of ergodic stationary distribution as well as extinction of hepatitis B are obtained. | 刘丽雅 蒋达清 Tasawar HAYAT Bashir AHMAD | 2018 | Acta Mathematica Scientia2018，38，6： | 3 |
| 16 | Interaction of radionuclides with natural and manmade materials using XAFS technique显示文摘The X-ray absorption fine structure(XAFS)technology has exhibited a very unique application in the study of sorption mechanism,chemical species and microstructures of radionuclides at the natural solid-water interfaces.In this review,the interaction mechanism of radionuclides with clay minerals and nanomaterials under different environmental conditions are summarized from the XAFS spectroscopy analysis.The coordination number and the bond distances of radionuclides,the oxidation-reduction reactions,the influence of humic substances and microorganisms on the species and structures of radionuclides at molecule level are reviewed and compared.This review is helpful to understand the interactions of radionuclides with oxides,natural clay minerals and nanomaterials,which is also crucial to evaluate the physicochemical behaviors of radionuclides in the natural environment. | Shujun Yu Xiangxue Wang Shitong Yang Guodong Sheng Ahmed Alsaedi Tasawar Hayat Xiangke Wang | 2017 | Science China Chemistry2017，60，2： | 3 |
| 17 | Solution-Processed Titanium Chelate Used as Both Electrode Modification Layer and Intermediate Layer for Efficient Inverted Tandem Polymer Solar Cells显示文摘 | Zhenzhen Shi Hao Liu Lixing Xia Yiming Bai Fuzhi Wang Bing Zhang Tasawar Hayat Ahmed Alsaedi CandZhan'ao Tan | 2018 | Chinese Journal of Chemistry2018，36，3： | 3 |
| 18 | QUALITATIVE ANALYSIS OF A STOCHASTIC RATIO-DEPENDENT HOLLING-TANNER SYSTEM显示文摘This article addresses a stochastic ratio-dependent predator-prey system with Leslie-Gower and Holling type II schemes. Firstly, the existence of the global positive solution is shown by the comparison theorem of stochastic differential equations. Secondly, in the case of persistence, we prove that there exists a ergodic stationary distribution. Finally, numerical simulations for a hypothetical set of parameter values are presented to illustrate the analytical findings. | 付静 蒋达清 史宁中 Tasawar HAYAT Ahmed ALSAEDI | 2018 | Acta Mathematica Scientia2018，38，2： | 3 |
| 19 | Dynamics of a neuron exposed to integer-and fractional-order discontinuous external magnetic flux显示文摘We propose a modified Fitzhugh-Nagumo neuron(MFNN) model. Based on this model, an integerorder MFNN system(case A) and a fractional-order MFNN system(case B) were investigated. In the presence of electromagnetic induction and radiation, memductance and induction can show a variety of distributions. Fractionalorder magnetic flux can then be considered. Indeed, a fractional-order setting can be acceptable for non-uniform diffusion. In the case of an MFNN system with integer-order discontinuous magnetic flux, the system has chaotic and non-chaotic attractors. Dynamical analysis of the system shows the birth and death of period doubling, which is a sign of antimonotonicity. Such a behavior has not been studied previously in the dynamics of neurons. In an MFNN system with fractional-order discontinuous magnetic flux, different attractors such as chaotic and periodic attractors can be observed. However, there is no sign of antimonotonicity. | Karthikeyan RAJAGOPAL Fahimeh NAZARIMEHR Anitha KARTHIKEYAN Ahmed ALSAEDI Tasawar HAYAT Viet-Thanh PHAM | 2019 | Frontiers of Information Technology & Electronic Engineering2019，20，4： | 2 |
| 20 | 一步旋涂法中反溶剂对中间相演变的新视角(英文)显示文摘反溶剂技术可以有效改善钙钛矿薄膜的质量.本文揭示了氯苯(CBZ)在结晶过程中起的重要作用.通过研究前体溶液中配合物的结构变化,我们观察到,在滴加反溶剂之前,MAI-PbI_2-DMF或MAI-PbI_2-DMSO尚未形成.快速去除多余溶剂后形成中间相,延缓钙钛矿结晶是得到高质量钙钛矿薄膜的关键.其中MAI-PbI_2-DMSO中间体表现出了高结晶的棒状结构,因此最终转变成非常致密和均匀的钙钛矿薄膜. | 任英科 段滨 徐亚峰 黄阳 李兆乾 胡林华 Tasawar Hayat 王红霞 朱俊 戴松元 | 2017 | Science China Materials2017，60，5： | 2 |
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