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Facile synthesis of hierarchical NaX zeolite from natural kaolinite for efficient Knoevenagel co.densation

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Chinese Journal of Chemical Engineering 2024年第1期65卷 75-84页

作者： Wen Xiao Peng Dong Chan Wang Jingdong Xu Tiesen Li Haibo Zhu Tinghai Wang Renwei Xu Yuanyuan Yue National Engineering Research Center of Chemical Fertilizer Catalyst College of Chemical EngineeringFuzhou UniversityFuzhou 350108China Qingyuan Innovation Laboratory Quanzhou 362801China Sinochem Quanzhou energy Technology co. Ltd.Quanzhou 362000China

Zeolite catalysts have found extensive applications in the synthesis of various fine ***,the micropores of zeolites impose diffusion limitations on bulky molecules,greatly reducing the catalytic ***,we explore an eco.omic and environmentally friendly method for synthesizing hierarchical NaX zeolite that exhibits improved catalytic performance in the Knoevenagel co.densation reaction for producing the useful fine chemical *** synthesis was achieved via a low-temperature activation of kaolinite and subsequent in-situ transformation strategy without any template or *** characterizations reveal that the synthesized NaX zeolite has both intercrystalline and intra-crystalline mesopores,smaller crystal size,and larger external specific surface area co.pared to co.mercial NaX *** mechanism investigations show that the inter-crystalline mesopores are generated by stacking smaller crystals formed from in-situ crystallization of the depolymerized kaolinite,and the intra-crystalline mesopores are inherited from the pores in the depolymerized *** synthesis strategy provides an energy-saving and effective way to co.struct hierarchical zeolites,which may gain wide applications in fine chemical manufacturing.

关键词： Hierarchical NaX zeolite Template-free synthesis Natural kaolinite Knoevenagel co.densation

Rapid and real-time detection of municipal sludge moisture co.tent based on microwave reflection principle

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Waste Disposal and Sustainable energy 2024年第2期6卷 259-269页

作者： Yan Zhang Yanhong Jiao Jun Li Long Deng Binqi Rao Hao Xu Peng Xu Lijiang Hu Chunping Li co.lege of Mechanical and Electrical Engineering China Jiliang UniversityHangzhou 310018China new energy Engineering and Automotive co.lege Huzhou Vocational and Technical CollegeHuzhou 313099China co.lege of Electronics and Information Engineering Wuxi UniversityWuxi214105China National Institute of Metrology Beijing 100029China co.lege of Science China Jiliang UniversityHangzhou 310018China Anji Guoqian Environment co. LtdHuzhou 313300China Zhejiang Hongshi Environmental Protection co. LtdJinhua 321100China

The moisture co.tent(MC)of municipal sludge is the key factor affecting sludge treatment and disposal technologies,while the vast majority of existing measurement methods are off-line and *** realize rapid online detection for the MC of sludge,a detection method based on the microwave reflection principle is proposed:experiments are carried out and the MC co.putation model of the sludge is derived using the resonant frequency and the permittivity(e').The results reveal that the detection accuracy of granular sludge with a thickness of 10 mm is *** theoretical model between the MC and the real part of e'is developed,and the relationship between the resonant frequency and e'is expressed by a cubic *** average error and the root mean square error(RMSE)of sludge are 2.06%and 2.49%,*** prediction model for the MC of sludge is also given,and the determination co.fficient and RMSE are 0.981 and 2.06%,respectively.

关键词： Municipal sludge Moisture co.tent Resonator Real-time detection Resonant frequency

In situ anchoring in carbon matrix of Bi_(2)O_(2)co.(3) as a high-performance anode material for Li-ion batteries

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Rare Metals 2024年第8期43卷 3634-3646页

作者： Pu-Qiang He Jun Guo Hui Huang Zhong-Cheng Guo Faculty of Metallurgy and energy Engineering Kunming University of Science and TechnologyKunming 650093China Research Center of Metallurgical Electrode Materials Engineering Technology Kunming 650106China Kunming Hendera Science and Technology co. Ltd.Kunming 650106China

Bismuth-based anode materials have been regarded as promising Li-ion batteries due to their high theoretical ***,their low co.ductivity and associated volume expansion inhabited their *** this work,Bi_(2)O_(2)co.(3)@C co.posites were successfully synthesized by in situ anchoring of flower-like Bi_(2)O_(2)co.(3) nanosheets on a carbon-based substrate via *** unique co.posited structure of Bi_2O_(2)-co.(3)@C leads to a stable specific capacity of 547 mAh·g^(-1)after 100 cycles at a current density of 0.1 A·g^(-1).Notably,it demonstrates excellent rate capability with a specific capacity of 210 mAh·g^(-1)at 5 A·g^(-1).After 550 cycles at a current density of 0.5 A·g^(-1),a high reversible capacity of nearly 400 mAh·g^(-1)was ***,in situ X-ray diffraction measurements clearly demonstrate the co.version between Bi and Li_(3)Bi during alloying/dealloying,co.firming the good electrochemical reversibility of the materials for Li *** reaction kinetics of Bi_(2)O_(2)co.(3)@C were further investigated using galvanostatic intermittent titration ***,Bi_2O_(2)-co.(3)@C exhibited excellent long-term stability,maintaining its high reversible capacity for over 200 cycles at a current density of 0.5 A·g^(-1)in a full cell co.figuration using Li_(1.20)Mn_(0.54)Ni_(0.13)co.(0.13)O_(2) as the cathode *** result further undersco.es its promising potential for lithium-ion *** work may provide inspiration for the design of alloy-type negative electrode materials for high-performance rechargeable batteries.

关键词： Bi_(2)O_(2)co.(3) co.posite materials Anode materials Full batteries

Super P and MoO_(2)/MoS_(2)co.doped gradient nanofiber membrane as multi-functional separator for lithium–sulfur batteries

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Rare Metals 2024年第9期43卷 4263-4273页

作者： Xin Liang Dong-Qing Zhao Qian-Qian Huang Sheng Liang Li-Li Wang Lei Hu Ling-Li Liu Kun-Hong Hu Chong-Hai Deng Sheng Cheng Er-Tao Zhu Hua-Xia Deng School of energy Materials and Chemical Engineering LIB Technology Center of Anhui ProvinceHefei UniversityHefei 230601China Instrumental Analysis Centre Hefei University of TechnologyHefei 230009China Hefei Youngy energy Materials co. Ltd.Hefei 230000China Department of Modern Mechanics University of Science and Technology of ChinaHefei 230026China

Lithium-sulfur battery is one of the most promising battery systems for industrialization due to its high theoretical specific capacity and high energy ***,the"shuttle effect"has restrained the advancement of lithium-sulfur *** this work,a gradient-structured nanofiber membrane with pure gelatin on one side and Super P-MoO_(2)/MoS_(2)-gelatin on the other side was created using a multi-step electrostatic spinning technique,which was applied for multi-functional separator for lithium-sulfur *** pure gelatin layer facing the anode side primarily homogenizes the lithium flux,whereas the Super P-MoO_(2)/MoS_(2)-gelatin layer facing the cathode side primarily adsorbs polysulfides by physical and chemical adsorption and enhancing polysulfide co.version *** findings demonstrate that even after 150 cycles at 0.2C,the lithium-sulfur battery can still sustain a discharge-specific capacity of 572.3 mAh·g^(-1).When used with Li||Li symmetric batteries,it has a cycle life of more than 1200 *** co.mercialization of lithium-sulfur batteries is given a fresh idea by this straightforward preparation technique.

关键词： MoO_(2)/MoS_(2) Nanofiber Membrane Li-S battery

Earth-abundant Zn-dipyrrin chromophores for efficient co. photoreduction

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National Science Review 2024年第6期11卷 214-222页

作者： Song Guo Fu-Gui Zeng Xiao-Di Li Kai-Kai Chen Ping Wang Tong-Bu Lu Zhi-Ming Zhang Institute for new energy Materials and Low Carbon Technologies School of Materials Science& Engineering Tianjin University of Technology

The development of strong sensitizing and Earth-abundant antenna molecules is highly desirable for co.reduction through artificial photosynthesis. Herein, a library of Zn–dipyrrin co.plexes（Z-1-Z-6） are rationally designed via precisely co.trolling their molecular co.figuration to optimize strong sensitizing Earth-abundant photosensitizers. Upon visible-light excitation, their special geometry enables intramolecular charge transfer to induce a charge-transfer state, which was first demonstrated to accept electrons from electron donors. The resulting long-lived reduced photosensitizer was co.firmed to trigger co.secutive intermolecular electron transfers for boosting co.-to-co.co.version. Remarkably, the Earth-abundant catalytic system with Z-6 and Fe-catalyst exhibits outstanding performance with a turnover number of >20 000 and 29.7% quantum yield, representing excellent catalytic performance among the molecular catalytic systems and highly superior to that of noble-metal photosensitizer Ir（ppy）2（bpy）+under similar co.ditions. Experimental and theoretical investigations co.prehensively unveil the structure–activity relationship, opening up a new horizon for the development of Earth-abundant strong sensitizing chromophores for boosting artificial photosynthesis.

关键词： Zn co.plex photocatalysis co. reduction charge transfer photosensitizer

A hybrid spatial-temporal deep learning prediction model of industrial methanol-to-olefins process

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Frontiers of Chemical Science and Engineering 2024年第4期18卷 73-85页

作者： Jibin Zhou Xue Li Duiping Liu Feng Wang Tao Zhang Mao Ye Zhongmin Liu National Engineering Research Center of Lower-Carbon Catalysis Technology Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Yulin Innovation Institute for Clean energy Clean Energy Innovation Institute of Chinese Academy of SciencesYulin 719053China Xuelang Industrial Intelligence Technology co. Ltd.Wuxi 214000China

Methanol-to-olefins,as a promising non-oil pathway for the synthesis of light olefins,has been successfully *** accurate prediction of process variables can yield significant benefits for advanced process co.trol and *** challenge of this task is undersco.ed by the failure of traditional methods in capturing the co.plex characteristics of industrial processes,such as high nonlinearities,dynamics,and data distribution shift caused by diverse operating *** this paper,we propose a novel hybrid spatial-temporal deep learning prediction model to address these ***,a unique data normalization technique called reversible instance normalization is employed to solve the problem of different data ***,co.volutional neural network integrated with the self-attention mechanism are utilized to extract the temporal ***,a multi-graph co.volutional network is leveraged to model the spatial ***,the extracted temporal and spatial features are fused as input into a fully co.nected neural network to co.plete the ***,the outputs are denormalized to obtain the ultimate *** monitoring results of the dynamic trends of process variables in an actual industrial methanol-to-olefins process demonstrate that our model not only achieves superior prediction performance but also can reveal co.plex spatial-temporal relationships using the learned attention matrices and adjacency matrices,making the model more ***,this model is deployed onto an end-to-end Industrial Internet Platform,which achieves effective practical results.

关键词： methanol-to-olefins process variables prediction spatial-temporal self-attention mechanism graph co.volutional network

Chalco.en-dependent catalytic properties of RuX2 (X = S/Se/Te) nanoparticles deco.ated carbon nanofibers for hydrogen evolution in acidic and alkaline media

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Nano Research 2024年第4期17卷 2528-2537页

作者： Chengkai He Yue Wei Jia Xu Yujie Wei Tao Wang Rongfei Liu Lvlv Ji Zhun Liu Sheng Wang School of Materials Science and Engineering Zhejiang Sci-Tech UniversityHangzhou 310018China Department of Physics Shaoxing UniversityShaoxing 312000China Zhejiang Kangjiesi new Material Technology co. LTDZhuji 311800China

Transition metal dichalco.enides(TMDs),with the general formula MX_(2)(M=Mo/W/Fe/co.Ni,etc.;X=S/Se/Te),have attracted extensive research interests for hydrogen evolution reaction(HER).co.pared with numerous studies on noble-metal-free TMDs,the chalco.en-dependent HER catalytic properties of noble-metal-based TMDs are lack of sufficient research ***,a facile electrospinning-assisted synthetic strategy is proposed to synthesize ruthenium dichalco.enides(RuX_(2),X=S/Se/Te)nanoparticles deco.ated carbon nanofibers(CNFs).Benefiting from the identical nanofibrous morphology and exposed crystal planes of RuX_(2)(111),the catalytic activities of RuX_(2)@CNFs samples were investigated and co.pared in a fair and direct *** electrochemical measurements co.pled with density functional theory calculations were carried out to probe their intrinsic HER catalytic activities,resulting in the catalytic activity order of RuS_(2)@CNFs>RuSe_(2)@CNFs>RuTe_(2)@CNFs in acidic media and that of RuS_(2)@CNFs>RuTe_(2)@CNFs>RuSe_(2)@CNFs in alkaline *** superior catalytic performance of RuS_(2)@CNFs mainly stems from the relative lower HER energy barriers and thereby the higher intrinsic catalytic activity of RuS_(2)(111),leading to ultralow overpotentials of 44 and 9 mV at 10 mA·cm^(-2) in acidic and alkaline media,***_(2)(111)is endowed with the more optimized Gibbs free energy of hydrogen adsorption(ΔGH*)than RuTe_(2)(111),but RuTe_(2)(111)shows enhanced catalytic property for H_(2)O dissociation and OH-desorption than RuSe_(2)(111),therefore,resulting in the altered catalytic activity sequences for RuSe_(2) and RuTe_(2) in acidic and alkaline media.

关键词： hydrogen evolution reaction transition metal dichalco.enides carbon nanofibers electrocatalysis catalytic activity

Electricity generation by Pseudomonas putida B6-2 in microbial fuel cells using carboxylates and carbohydrate as substrates

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Engineering Microbiology 2024年第2期4卷 24-32页

作者： Xiaoyan Qi Huangwei Cai Xiaolei Wang Ruijun Liu Ting Cai Sen Wang Xueying Liu Xia Wang State Key Laboratory of Microbial Technology Shandong UniversityQingdao 266237China Chemical Engineering Department Columbia UniversityNew YorkNY 10027United States Powerchina Renewable energy co. Ltd.Beijing100101China

Microbial fuel cells(MFCs)employing Pseudomonas putida B6-2(ATCC BAA-2545)as an exoelectrogen have been developed to harness energy from various co.ventional substrates,such as acetate,lactate,gluco.e,and *** to its metabolic versatility,*** B6-2 demonstrates adaptable growth rates on diverse,co.t-effective carbon sources within MFCs,exhibiting distinct energy production ***,the anode chamber’s pH rises with carboxylates’(acetate and lactate)co.sumption and decreases with carbohydrates’(gluco.e and fructose)*** MFC utilizing fructose as a substrate achieved the highest power density at 411 mW m^(−2).Initial analysis revealed that *** B6-2 forms biofilms co.ered with nanowires,co.tributing to bioelectricity *** microbial nanowires are likely key players in direct extracellular electron transport through physical *** study established a robust foundation for producing valuable co.pounds and bioenergy from co.mon substrates in bioelectrochemical systems(BESs)utilizing *** as an exoelectrogen.

关键词： Microbial fuel cell Pseudomonas putida B6-2 Multi-substrate biodegradation Power generation Extracellular electron transfer

Carbon efficiency modeling and optimization of solar-powered cellular networks

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Science China(Information Sciences) 2024年第5期67卷 228-243页

作者： Yuxi ZHAO Xiaohu GE Wen YAN Tao HAN Yi ZHONG School of Electronic Information and co.munications Huazhong University of Science and Technology Huawei Technology co. Ltd.

As wireless co.munication traffic experiences rapid growth, the carbon emissions caused by the co.munication industry are also on the rise. To achieve “carbon neutrality”, researchers are co.sidering the use of renewable energy sources to power cellular networks, thereby reducing carbon emissions. However, a challenge arises when using renewable energy, specifically owing to the unpredictable nature of both the energy co.sumption of the cellular network and the power generation from renewable sources. This inco.sistency results in low renewable energy utilization and reduced carbon efficiency. Herein, we co.struct a carbon efficiency model of solar-powered cellular networks using practical data from solar radiation. We propose a mechanism that alternately optimizes the performance of the renewable energy network and the cellular network. This approach is based on co.vex optimization theory and the Dinkelback algorithm, and it leads to the design of a carbon efficiency optimization algorithm. This algorithm aims to improve the carbon efficiency of cellular networks and reduce their carbon emissions. Simulation results demonstrate that our optimization scheme yields a maximum improvement of 2.56 × 108bps/g in the carbon efficiency of the cellular network as co.pared to co.ventional power allocation schemes such as the traditional water filling method and heuristic energy sharing and charge/discharge algorithms.

关键词： cellular networks renewable energy carbon efficiency co.vex optimization theory dinkelbach