MOLECULES
·
2022
·Vol. 27
·期 14
·4524
·
IF 4.927
Tingting Wu,Huan Peng,Xiaowei Liu,Ruijin Wu
Carbamazepine (CBZ), as a typical pharmaceutical and personal care product (PPCP), cannot be efficiently removed by the conventional drinking water and wastewater treatment process. In this work, the CoS2/Fe2+/PMS process was applied for efficient elimination of CBZ. The CBZ removal efficiency of CoS2/Fe2+/PMS was 2.5 times and 23 times higher than that of CoS2/PMS and Fe2+/PMS, respectively. The intensity of DMPO-HO• and DMPO-SO4•−followed the order of Fe2+/PMS < CoS2/PMS < CoS2/Fe2+/PMS, also suggesting the CoS2/Fe2+/PMS process has the highest oxidation activity. The effects of reaction conditions (e.g., CoS2dosage, Fe2+concentration, PMS concentration, initial CBZ concentration, pH, temperature) and water quality parameters (e.g.,SO42−,NO3−,H2PO4−,Cl−,NH4+, humic acid) on the degradation of CBZ were also studied. Response surface methodology analysis was carried out to obtain the best conditions for the removal of CBZ, which are: Fe2+= 70 µmol/L, PMS = 240 µmol/L, CoS2= 0.59 g/L. The sustainability test demonstrated that the repeated use of CoS2for 8 successive cycles resulted in little function decrease (<10%). These findings suggest that CoS2/Fe2+/PMS may be a promising method for advanced treatment of tailwater from sewage treatment plant.Keywords:cobalt disulfide;persulfate;carbamazepine;advanced oxidation process
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemElectroChem
·
2021
·Vol. 9
·期 3
·e202101566
·
IF 4.59
Xinlin Chen,Ran Jiang,Cunku Dong,Hui Liu,Jing Yang,Xiwen Du
Graphical One-dimensional nanoneedles : An efficient catalyst for overall water splitting is prepared by modulating the electron density of Co 2+ /Co 3+ via the formation of a CoO−Co 9 S 8 heterostructure. It is a great challenge to synthesize efficient electrocatalysts for overall water splitting, especially non-noble metal catalysts. Herein, one-dimensional polycrystalline nanoneedles composed of CoO−Co 9 S 8 nano heterostructures, in situ grown on carbon fiber paper are prepared for efficient overall water electrolysis. Due to strong electronic coupling, charge densities of Co 2+ /Co 3+ in Co 9 S 8 and Co 2+ in CoO are favorably modified at the interface of CoO and Co 9 S 8 , resulting in optimized reaction intermediates absorption and greatly enhanced bifunctional HER/OER activities. CoO−Co 9 S 8 /CFP delivers a current density of 10 mA cm −2 in alkaline electrolyte at overpotentials of 184 mV and 270 mV for HER and OER, respectively. When used as electrocatalyst for overall water splitting, it needs a low cell potential of 1.66 V to realize water electrolysis at 10 mA cm −2 . This work provides a new strategy to tune the electronic structures of transitional metal active sites via constructing nano heterostructures for efficient water electrolysis.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Fang Liu,Wenjun He,Ying Li,Fangqing Wang,Jingyu Zhang,Xuewen Xu,Yanming Xue,Chengchun Tang,Hui Liu,Jun Zhang
Exploring high efficient transition-metal dichalcogenides catalysts for hydrogen evolution reaction (HER) is important for water-derived hydrogen fuel. Pyrite cobalt disulfide (CoS 2 ) is one of the potential HER catalysts due to its low price and inherent metallicity, but its catalytic activity is still unsatisfactory possibly attributed to the S sites with catalytic inert; hydrogen adsorption on S sites is weak extremely. Metal cation doping has been considered as one of the most available methods to modulate the electronic structure of electrocatalysts. Here, we report non-transition metal tin (Sn) doped CoS 2 nanowire arrays grown on carbon cloth (Sn-CoS 2 /CC) as available catalysts for HER. The Sn-CoS 2 /CC catalyst with optimal doping concentration not only has an enhanced over potential of 161 mV at 10 mA cm −2 , and the Tafel slope is 94 mV dec -1 , but also shows good long-term durability in 32 h of testing. Experimental results and further density functional theory (DFT) calculations show that Sn doping can improve the charge transfer ability, enhance electronic conductivity, and arouse the catalytic insert S sites with optimal hydrogen adsorption free energy (ΔG H* ). This work investigates a new method to activate the inert sites in metal-compound catalysts for water splitting and beyond through non-transition metal doping.
研究领域:
材料科学
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催化化学
·
理论计算
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Donghong Duan,Kaixin Chen,Chongzhi Xing,Xiaoqiang Wang,Xianxian Zhou,Shibin Liu
The development of lithium-sulfur (Li-S) batteries necessitates the creation of efficient cathode materials . By simultaneous phosphating and sulfurating, a spindle-shaped CoP-Co 3 S 4 heterostructure sulfur cathode substrate made up of numerous tiny needle-like structures is created. The benefits of CoP with outstanding conductivity and Co 3 S 4 with great adsorption capacity are combined in the as-prepared CoP-Co 3 S 4 heterostructures, which achieve efficient capture-diffusion-transformation of polysulfides at the interface. The CoP accelerates the redox kinetics toward polysulfide conversion, and the Co 3 S 4 has a considerable adsorption power toward polysulfides. The quick nucleation of polysulfide and increased capture effectiveness are aided by the quick transfer of polysulfide from the Co 3 S 4 surface to the CoP surface. As a result, the CoP-Co 3 S 4 @S cathode battery with a 1.1 mg cm −2 sulfur load achieves a high initial capacity of 1516.9 mAh g −1 at 0.2 C and maintains that capacity after 100 cycles at 750.1 mAh g −1 . After 300 cycles, even the 565.1 mAh g −1 specific capacity can be attained at 1 C.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Yuanchu Zhu,Jing Yao,Lina Bai,Wenchao Zhang,Wei Wang,Xinzhi Ma,Lili Wu
Molybdenum disulfide (MoS2) is considered as a promising electrochemical catalyst for hydrogen generation. However, insufficient exposed active sites and poor conductivity severely impede its large-scale applications. Herein, the heterogeneous MoS2/CoS2 electrocatalyst was grown in situ on carbon cloth. The synergistic interaction between CoS2 and MoS2 occurring at the dense heterointerfaces grants the hybrid higher catalytic activities than single components, thereby speeding up hydrogen production rates. After annealing, the composite exhibits an ultralow overpotential of 67 mV at 10 mA cm–2 and a small Tafel slope of 70 mV dec–1 in 1 M KOH due to the improved conductivity and intimate connection between MoS2 and CoS2. Furthermore, it maintains an excellent cycle durability of 65 h without obvious attenuation at 20 mA cm–2. In-situ shielding tests reveal the main active sites coming from MoS2 rather than CoS2. On the basis of experimental measurements and theoretical calculations, CoS2 should work as the electron donor in the HER process and improve not only H2O adsorption but also H2 emission behaviors. The excellent hydrogen evolution performance of annealed-MoS2/CoS2/CC composite indicates that the present design is a prospective option for developing low-cost and efficient HER electrocatalysts in alkaline electrolytes.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 4
·e202405183
·
IF 2
Jingwen Zhang,Zeyang He,Hao Fu,Wei Kong,Petr Senin,Arkadii Proskurin,Ting Bian,Shitan Yan
Graphical Phosphomolybdic acid doping and co-etching with thioacetamide at low temperatures resulted in the formation of uniformly Mo-doped CoS₂ nanoparticles exhibiting a hollow structure that increased the number of active sites and provided abundant reaction sites. In terms of performance, Mo-CoS₂ exhibits the competitive OER and HER properties for an efficient overall water splitting. Nowadays, the sluggish hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) kinetics are the key obstacles limiting the commercial application of water splitting. In this study, a size-matching strategy is proposed to construct the molybdenum-doped CoS 2 polyhedra (Mo-CoS 2 ) by encapsulating polyoxometalate (POM, H 3 PMo 12 O 40 ) guests into mesoporous zeolite imidazolium framework-67 (ZIF-67), with thioacetamide (TAA) serving as a gentle sulfur source. The catalyst exhibits a pronounced hollow structure due to the synergistic etching effects of POM and TAA, which can increase the number of active sites. Additionally, the incorporation of Mo optimizes the electronic structure, thereby improving both HER and OER performance. In alkaline electrolytes, Mo-CoS 2 delivers an overpotential of 330 mV and 269 mV for OER and HER, respectively, to produce a current density of 100 mA cm −2 . Moreover, Mo-CoS 2 demonstrates exceptional performance in overall water splitting, achieving a cell voltage of 1.55 V at 10 mA cm −2 , along with outstanding long-term stability. This study provides a promising avenue for the structural and component optimization of cobalt sulfide, which could significantly improve the efficiency of hydrogen production.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Baocang Liu,Yan Cheng,Bo Cao,Minghao Hu,Peng Jing,Rui Gao,Yaping Du,Jun Zhang,Jinghai Liu
A multicomponent 3D monolithic electrode was designed that consists of Co single atoms anchored/nitrogen, sulfur co-doped carbon nanotubes (CoSAs-NS-CNTs) on carbon cloth (CC) with ultra-thin MoS 2 nanosheets externally decorated and ultra-small CoS 2 nanodots internally confined (MoS 2 /CoSAs-NS-CNTs@CoS 2 /CC) to form a hybrid heterojunction electrode with double interfaces as vectorial electron transport pathways for promoting electrocatalytic performance. The integration of well-distributed MoS 2 nanosheets and CoS 2 nanodots linked with Co single atoms anchored/N, S co-doped CNTs endows abundant multiple active sites, outstanding conductivity, and the downshifted d-band center with a thermodynamically favorable hydrogen adsorption free energy (ΔG H* ) for effectively catalyzing hydrogen evolution reaction (HER). As a result, the optimal MoS 2 /CoSAs-NS-CNTs@CoS 2 /CC electrode exhibits outstanding HER performance with overpotentials of 72 and 56 mV at 10 mA cm −2 and small Tafel slopes of 59.4 and 43.2 mV dec -1 in acidic and alkaline solutions, respectively, outperforming most of the previously reported molybdenum/cobalt sulfide-based electrocatalysts. Moreover, the electrode also displays good durability and stability reflected from the small decrease on activity after 5000 CV cycles and nearly no decay in current density after electrolysis for 20 h.
研究领域:
材料科学
·
电催化
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2018
·Vol. 14
·期 26
·1801070
·
IF 9.598
Yuxuan Li,Jie Yin,Li An,Min Lu,Ke Sun,Yong-Qin Zhao,Daqiang Gao,Fangyi Cheng,Pinxian Xi
Electrochemical water splitting to produce hydrogen and oxygen, as an important reaction for renewable energy storage, needs highly efficient and stable catalysts. Herein, FeS 2 /CoS 2 interface nanosheets (NSs) as efficient bifunctional electrocatalysts for overall water splitting are reported. The thickness and interface disordered structure with rich defects of FeS 2 /CoS 2 NSs are confirmed by atomic force microscopy and high-resolution transmission electron microscopy. Furthermore, extended X-ray absorption fine structure spectroscopy clarifies that FeS 2 /CoS 2 NSs with sulfur vacancies, which can further increase electrocatalytic performance. Benefiting from the interface nanosheets' structure with abundant defects, the FeS 2 /CoS 2 NSs show remarkable hydrogen evolution reaction (HER) performance with a low overpotential of 78.2 mV at 10 mA cm −2 and a superior stability for 80 h in 1.0 m KOH, and an overpotential of 302 mV at 100 mA cm −2 for the oxygen evolution reaction (OER). More importantly, the FeS 2 /CoS 2 NSs display excellent performance for overall water splitting with a voltage of 1.47 V to achieve current density of 10 mA cm −2 and maintain the activity for at least 21 h. The present work highlights the importance of engineering interface nanosheets with rich defects based on transition metal dichalcogenides for boosting the HER and OER performance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
·
2021
·
IF 9.642
Wenran Gao,Gang Wu,Xun Zhu,Muhammad Asif Akhtar,Guiying Lin,Xun Hu,Yong Huang,Shu Zhang,Hong Zhang
The conversion of cellulose to platform chemicals has attracted much attention because of its renewability. This work proposed an earth-abundant cobalt disulfide as a heterogeneous catalyst for methyl levulinate production from cellulose. The highest yield of methyl levulinate reached 61 mol% under the tested conditions of 200 °C, 2 MPa initial pressure, 0.45 catalyst/cellulose mass ratio, and 3 h reaction time. The XRD and TEM analyses demonstrated the crystal facet (111) of cobalt disulfide as a robust active site, which was in good agreement with the highest acidity of the crystal facet (111) calculated by the work functions. The XPS characterization showed that the main chemical valence of cobalt disulfide responsible for the methyl levulinate production was the surface Co 2+ species. This study is valuable for the development of a recoverable catalyst for the cellulose to methyl levulinate process.
研究领域:
化学工程
·
催化
·
可再生能源
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2017
·
IF 4.233
Zezhou Yang,Yun Zhu,Maoqiang Chi,Ce Wang,Yen Wei,Xiaofeng Lu
The development of highly sensitive and low-cost biosensors for the detection of dopamine is of paramount importance for medical diagnostics. Herein, we report the preparation of a new peroxidase-like catalyst with a uniform heterostructure by using a technique involving electrospinning, annealing and solvothermal reaction. In this catalyst system, cobalt sulfide (CoS) nanoparticles were homogenously distributed and supported on the surface of cobalt ferrite (CoFe 2 O 4 ) nanotubes. The as-prepared CoFe 2 O 4 /CoS hybrid nanotubes showed remarkably high catalytic efficiency as peroxidase mimics toward the oxidation of 3,3,5,5-tetramethylbenzidine (TMB) in the presence of H 2 O 2 . Owing to the synergistic effect between the CoFe 2 O 4 and CoS component, the prepared CoFe 2 O 4 /CoS hybrid nanotubes exhibited enhanced peroxidase-like activity, exceeding that of either the CoS nanoparticles or CoFe 2 O 4 nanotubes alone. Dopamine has been widely investigated due to its unique function in the nervous system. Consequently, various approaches have been developed for the sensitive determination of dopamine. In this work, a simple and sensitive colorimetric route for the detection of dopamine was established based on the ability of dopamine to induce the reduction of oxidized TMB to TMB with consequent fading of the blue color. This method shows a wide linear range (0–50 μM) and a low detection limit of 0.58 μM. The unique heterostructure with spinel/sulfide interfaces represents a new concept for the construction of highly efficient and multifunctional biocatalysts.
研究领域:
生物传感
·
材料科学
·
医学诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Select
·
2021
·Vol. 3
·期 1
·147-156
·
IF 0
Mengqiu Li,Ze Xu,Yuting Li,Juan Wang,Qin Zhong
Transition metal chalcogenides are attractive electrocatalysts for oxygen evolution reaction (OER) or hydrogen evolution reaction (HER) due to their natural abundance and diverse structure. Herein, nickel sulfides (Ni 3 S 2 ) and nickel/cobalt sulfides nanohybrid have been in situ fabricated on nickel foam (NF) by a facile hydrothermal method with sodium sulfide (Ss), L-cysteine (Lc) or thiourea (Tu) as a sulfur source, respectively. The results show that sulfur source has a great influence on the phase structure, morphology and electrocatalytic performance of transition metal sulfides. The nickel sulfide with the sodium sulfide as a sulfur source (Ni Ss ) shows better HER and OER activity in 1 M KOH. With the Co-doping, three-dimensional honeycomb-like NiCo Ss nanosheet clusters exhibits the enhanced electrocatalysis properties with overpotentials of only 168 mV at 10 mA cm –2 for HER and 234 mV at 20 mA cm –2 for OER, respectively. The NiCo Ss shows the good bifunctional activities for overall water splitting and presents considerable stability for 24 hours. The good electrochemical activities of metal sulfides by using inorganic sodium sulfide can be attributed to the large exposed surface area and heterostructure compositions of Co 9 S 8 and Ni 3 S 2 .
研究领域:
材料科学
·
电化学
·
能源技术
✓ 已验证
DOI
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Ruyi Fang,Yingzuo He,Ruojian Ma,Minghao Ruan,Xinxu Wang,Jun Zhang,Yongping Gan,Xinping He,Hui Huang,Xinhui Xia,Lei Wang,Zhen Xiao,Yanxian Jin,Wenkui Zhang,Xinyong Tao,Yang Xia
The development of high-performance all-solid-state lithium–sulfur batteries (ASSLSBs) has garnered considerable attention due to their potential for high energy density and enhanced safety. However, significant challenges such as poor cycling stability, interface incompatibility, and reaction kinetics hinder severely their practical application. In this work, an all-in-one sulfur/cobalt disulfide (S/CoS2) composite cathode is proposed by integrating sulfur and homogenized cobalt disulfide (CoS2) as the sulfur-based cathode materials with the sulfide solid electrolyte (Li6PS5Cl) through ball milling. This strategy combines the homogenization effect and catalytic effect of CoS2 to improve the interfacial compatibility and reaction kinetics of the sulfur-based cathode, thereby reducing interfacial resistance and enhancing overall battery performance. It is confirmed that the introduction of homogenized CoS2 can significantly improve interfacial lithium-ion transport, enhancing the rate performance. More importantly, it promotes the conversion of S to Li2S, improving the utilization rate and reaction kinetics of the ASSLSBs. The S/CoS2 cathode delivers an impressive initial discharge capacity of 1584 mA h g–1 with a capacity utilization of 99% at a current density of 0.25 mA cm–2 and maintains 915 mA h g–1 after 100 cycles. Even at 1.28 mA cm–2, the cathode exhibits a specific capacity of 474 mA h g–1. This all-in-one strategy provides valuable insights into the design of next-generation ASSLSBs and holds significant potential for future energy storage technologies.
研究领域:
能源材料
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）