Processes
·
2022
·Vol. 10
·期 7
·1359
·
IF 3.352
Xiaoyu Huo,Chao Jia,Shanshan Shi,Tao Teng,Shaojie Zhou,Mingda Hua,Xiangdong Zhu,Shicheng Zhang,Qunjie Xu
Potassium thiocyanate (KSCN), a highly efficient “three birds with one stone” activator, might work with inorganic activators to produce excellent N/S co-doped porous carbon (NSC) materials for environmental remediation. However, the effects of inorganic activators on cooperative activation are unclear. As a result, the influence of inorganic activators on the synthesis of NSC materials was investigated further. This study shows that the surface areas of the NSC materials acquired through cooperative activation by potassium salts (KOH or K2CO3) were considerably higher than those acquired through KSCN activation alone (1403 m2/g). Furthermore, KSCN could cooperate with K2CO3to prepare samples with excellent specific surface area (2900 m2/g) or N/S content. The as-prepared NSC materials demonstrated higher adsorption capability for chloramphenicol (833 mg/g) and Pb2+(303 mg/g) (pore fitting, complexation). The research provides critical insights into the one-step synthesis of NSC materials with a vast application potential.Keywords:N/S co-doping;porous carbon;chloramphenicol adsorption;Pb2+removal
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·
IF 10.7
Zhengjie Su,Xinru Wu,Dong-Hau Kuo,Baoqian Yang,Binghong Wu,Longyan Chen,Pengkun Zhang,Jinguo Lin,Dongfang Lu,Xiaoyun Chen
Herein, an Ag/S co-doped Bi2O3-based sulfur oxide catalyst was prepared via a facile green method. The Ag/S–Bi2O3 catalyst with suitable Ag/S doping demonstrated super visible light photocatalytic hydrogen evolution (PHE) at 7.52 mmol g−1 h−1, with an apparent quantum efficiency (AQE) of 8.67% at 420 nm. Ag/S co-doping can adjust the energy band structure of an oxidation type Bi2O3 catalyst, converting it into a visible light hydrogen production catalyst suitable for hydrogen production. Sulfur doping adjusts the content of oxygen vacancies to enhance the surface active sites, and the introduction of noble metal silver endows the catalyst with more excellent electrical conductivity and electron trapping ability. Thus, Bi2O3 with Ag/S co-doping produced a suitable energy band structure, enhanced the content of oxygen vacancies and the number of surface active sites, and endowed the catalyst with excellent electrical conductivity and electron trapping ability, significantly producing catalysts with excellent visible light PHE activity. Furthermore, Ag/S–Bi2O3-3 exhibited super visible light PHE activity and excellent stability and persistence and is expected to play a potential role in the field of PHE reactions (PHERs).
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2025
·
IF 4.7
Xiaoxu Cui,Zherui Wan,Zhonghao Li,Fengxia Wang,Pengshuai Wei,Guang Yang
Herein, intelligent N, S-doped fluorescent carbon dots (N, S-CDs) were constructed by using l -cysteine and carboxymethyl cellulose (CMC) polymer as precursors through a one-step hydrothermal method. The designed N, S-CDs displayed strong fluorescence (FL) emission with a FL quantum yield of 44.48 % and could be utilized for the quantitative tracing of TCs and Al 3+ via the “On-OFF-ON” FL transition with wide linear detection range (1.66–104.5 μM for TCH, 1.66–163.2 μM for OTC, 1.66–69.5 μM for DOX and 33–104.3 μM for Al 3+ ). The detection limits (LODs) of TCH, OTC, DOX and Al 3+ were calculated to be 53.02 nM, 95.61 nM, 41.87 nM and 57.69 nM, respectively. On the basis of the FL “On-OFF-ON” strategy, multiple logical gate operations including “NOR” and “INHIBIT”, were constructed successfully. Additionally, N, S-CDs uploaded to hydrogen bars were utilized for the recognition of TCs and Al 3+ in a portable manner, which revealed great application potential in the field of anti-counterfeiting and encryption.
研究领域:
分析化学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 2
·期 33
·13565-13570
·
IF 0
Yingying Fan,Dongxue Han,Bin Cai,Weiguang Ma,Mohsin Javed,Shiyu Gan,Tongshun Wu,M. Siddiq,Xiandui Dong,Li Niu
TiO2 is an abundant and environmentally benign material, but has a wide band gap, which greatly confines its applications in photocatalysis. Doping and modifying the material composition are both generally used to change and control the photocatalytic activity of semiconductors. Herein, we describe a method and resulting activity of depositing Ce-/S-codoped TiO2 nanoparticles (NPs) on water-soluble sulfonated graphene (SGE) sheets, which guarantees a direct contact and satisfactory electron transfer between the semiconductor and graphene. The Ce/S–TiO2 NPs are homogeneously fixed on the surface of SGE sheets with an average particle size of ∼7 nm. The resulting composite showed noticeable activity in photodegrading methyl orange (κ = 0.425 h−1). This improved performance can be attributed to the synergistic effects of Ce- and S-codoping toward TiO2 and the composite action between TiO2 NPs and SGE. This type of novel composite is expected to stimulate the development of doped and graphene-involved photocatalysts for addressing environmental problems.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xiaobo Wang,Zhengqiu He,Kaixuan Huo,Jialiang Liu,Qingshan Zhao,Mingbo Wu
Constructing high-performance and low-cost carbon anodes for potassium-ion batteries (PIBs) is highly desirable but faces great challenges. In this study, we present a novel approach to fabricating N/S co-doped hollow amorphous carbon (LNSHAC) for superior potassium storage through a template-assisted molecular structure regulation strategy. By tailoring a 3D crosslinked aromatics precursor from fluid catalytic cracking slurry (FCCs), the LNSHAC features a N/S co-doped hollow structure with enlarged interlayer spacing of up to 0.405 nm and rich defects. Such unique microstructure offers fast transport channels for K-ion intercalation/deintercalation and provides more active sites, leading to boosted reaction kinetics and potassium storage capacity. Consequently, the LNSHAC electrode delivers an impressive reversible capacity (466.2 mAh g −1 at 0.1 A/g), excellent rate capability (336.3 mAh g −1 at 2 A/g), and superior cyclic performance (256.9 mAh g −1 after 5000 cycles at 5 A/g with admirable retention of 76.9 %), standing out among the reported carbon-based anodes. When KFeHCF is employed as the cathode, the LNSHAC-based K-ion full cell exhibits a high reversible capacity of 176.6 mAh g −1 at 0.1 A/g and excellent cyclic stability over 200 cycles. This work will inspire the development and application of advanced carbon-based materials for potassium electrochemical energy storage.
研究领域:
材料科学
·
电化学能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemCatChem
·
2017
·Vol. 10
·期 4
·796-803
·
IF 4.803
Shi Feng,Xingyue Li,Jia Huo,Qiling Li,Chao Xie,Tingting Liu,Zhigang Liu,Zhenjun Wu,Shuangyin Wang
Graphical Porous carbon electrode : CoS 2 @N/S-codoped porous carbon is prepared through an electrodeposition–ZIF conversion–sulfuration strategy. The loading of active sites can be controlled easily by varying the electrodeposition time. The resulting material can be employed directly as a working electrode for the hydrogen evolution reaction and shows an excellent catalytic activity and stability. A convenient, controllable method to fabricate an electrode is necessary to achieve the practical application of a hydrogen evolution reaction (HER) catalyst. In this work, an electrodeposition–ZIF conversion–sulfuration strategy is developed to produce a CoS 2 @N/S-codoped porous carbon (CoS 2 @NSC/CFP) to drive the HER efficiently. CoS 2 @NSC/CFP was prepared by the electrodeposition of Co(OH) 2 on a carbon fiber paper followed by conversion into ZIF-67 and subsequent sulfuration with sulfur. The loading of electroactive components can be controlled easily in the range of 0.7–10.0 mg cm −2 by varying electrodeposition time from 5 min to 2 h. The resulting material can be employed directly as a working electrode for the HER and it shows an excellent catalytic activity and stability with an overpotential of 95 mV at 10 mA cm −2 and 158 mV to reach 100 mA cm −2 in an acidic medium. The high efficiency is related intimately to the high dispersion of ultra-small CoS 2 nanoparticles, heteroatom-codoping, and the 3 D porous network configuration of the carbon fiber paper.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Jiarun Cheng,Chaojie Lyu,Hongming Chen,Dongsheng Geng,Jinlong Zheng
Elucidating the mechanism of metal-support interface domain regulation is crucial for designing efficient fuel cell electrocatalysts. Herein, we propose an emerging strategy to enhance oxygen reduction reaction (ORR) activity and selectivity by regulating the Lewis alkalinity of carbon support to adjust the Lewis acidity of metal sites. The experimental results and density functional theory (DFT) simulations show that the introduction of N/S atoms into the carbon support structure will break the charge balance of the carbon skeleton and effectively regulate the charge distribution in the Pt-carbon interface domain, thus promoting the oxidation of the Lewis acid Pt atoms to a higher valence state Pt x+ , so as to optimize the adsorption energy of oxygen-containing intermediates. Moreover, Bader charge analysis also verifies that N,S-HMCS, as a Lewis base, can receive more electrons from the Pt sites of Lewis acid, and the electron loss at Pt sites caused by N,S-HMCS strengthens interfacial electron effect. Meanwhile the strong electron adsorption ability of N/S atoms causes the d-band center of Pt atom orbital to shift upward to the Fermi level, which strengthens the binding of metal Lewis acid Pt sites with *OOH intermediates, and improves the 4-electron transfer mechanism. This research reveals the direct role of Lewis acid sites in ORR of fuel cell cathode, and provides a feasible way to guide the design of electrocatalysts with Lewis acid/base double centers.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 63
·35989-35997
·
IF 2.936
Halidan Maimaiti,Abuduheiremu Awati,Dedong Zhang,Gunisakezi Yisilamu,Bo Xu
To obtain high-efficiency, low-cost, environmentally friendly carbon-based photocatalytic material, we synthesized coal-based carbon dots with sp2 carbon structure and multilayer graphene lattice structure by the hydrogen peroxide (H2O2) oxidation method to strip nano-scale crystalline carbon in the coal structure and link with oxygen-containing groups such as the hydroxyl group. N, S co-doped aminated coal-based carbon nanoparticles (NH2-CNPs) were then obtained by thionyl chloride chlorination and ethylenediamine passivation. The physical properties and chemical structure of the synthesized NH2-CNPs were studied and the photocatalytic CO2 reduction performance was tested. The results show that NH2-CNPs are vesicle-type spherical particles with particle size of 42.16 ± 7.5 nm and have a mesoporous structure that is capable of adsorbing CO2. A defect structure was formed on the surface of the NH2-CNPs due to the doping of N and S elements, thereby significantly improving the ability to photogenerate electrons under visible light along with the ability to efficiently separate the photo-generated carriers. The photocatalytic reduction products of CO2 over NH2-CNPs were CH3OH, CO, C2H5OH, H2 and CH4. After 10 hours of reaction, the total amount of products was 807.56 μmol g−1 cat, the amount of CH3OH was 618.7 μmol g−1 cat, and the calculated selectivity for conversion of CO2 to CH3OH was up to 76.6%.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Kangfeng Pang,Wei Sun,Feng Ye,Lihui Yang,Mengjie Pu,Cao Yang,Qichun Zhang,Junfeng Niu
N,S-co-doped carbons were synthesized through the calcination of sulfur-modified chitosan for the first time, and utilized as persulfate activators for sulfamethoxazole (SMX) remediation in water. The chitosan and sulfonyl chloride underwent one-step sulfonylation reaction to generate S-modified chitosan. The catalyst NSC-3 showed both excellent adsorption and catalytic oxidation efficiency, corresponding 98.62% removal and 81.34% mineralization rate within 90 min. The rate constant ( k obs ) was up to 0.0578 min −1 , with 75.60-folders higher than that of sulfur-free catalyst NC (7.6580 ×10 −4 min −1 ). The synergy of N and S contributed to the improvement of removal efficiency. The adsorption and oxidation performance were highly depended on the S/N atomic ratio. At the S/N ratio of 0.18, the maximum adsorption and oxidation capability were obtained. The NSC-3/PS system exhibited outstanding adaptability at the wide pH range from 3.07 to 9.28, while the inhibitory effect occurred at strong basic conditions (pH = 11.01). The thiophene sulfur and structural defects were identified as the catalytic sites in activating PS. Both radical and non-radical pathways were responsible for degradation process, where 1 O 2 played a major role, SO 4 ·- exerted a minor contribution, and O 2 ·- acts as the precursor for the production of 1 O 2 . Another source of 1 O 2 was assigned to the activation of PS by structure defects . This work indicates that N,S-co-doped carbon at an optimal S/N atomic ratio effectively catalyzes persulfate, and provides an innovative method to construct bifunctional carbon materials of adsorption and oxidization.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Qian Zhu,Xun Sun,Hong Zhao,Dan Xu,Zhengping Dong
The N, S co-doped carbon nanotube-encapsulated Co nanoparticle (NP) material was prepared by one-pot pyrolysis of cheap precursor materials. As-prepared Co@NSC-800 exhibited excellent catalytic activity in transfer hydrogenation and N-formylation of nitroarenes, and the solvent and hydrogen source were the critical factors affecting the selectivity of aniline and benzamide. Moreover, the synergistic effect between Co NPs and N, S atoms was beneficial to improve the catalytic efficiency of Co@NSC-800; especially, the incorporation of S atoms greatly boosted the selectivity of N-formylation. Despite the use of HCOONH4 (HCOOH) as a hydrogen donor for hydrogenation and formylation of nitroarenes, the special nanotube structure of the Co@NSC-800 catalyst effectively prevented the corrosion of Co NPs and showed excellent durability under harsh reaction conditions. In addition, the catalyst maintained excellent catalytic activity after six cycles and was easily separated using an external magnet. Thus, this study can provide an effective method for the transfer hydrogenation and formylation of nitroarenes.
研究领域:
化学工程
·
材料科学
·
催化反应
✓ 已验证
DOI
高影响因子
Energy & Environmental Science
·
2024
·Vol. 17
·期 4
·1612-1623
·
IF 32.4
Yaru Gong,Pan Ying,Qingtang Zhang,Yuqi Liu,Xinqi Huang,Wei Dou,Yujing Zhang,Di Li,Dewei Zhang,Tao Feng,Meiyu Wang,Guang Chen,Guodong Tang
Polycrystalline SnSe is considered as a highly promising candidate for thermoelectric applications due to its facile processing, machinability and scale-up applications. Here, we report an extraordinary peak ZT of 2.4 as well as a high average ZT of 0.9 for Ge and S codoped SnSe nanorods synthesized by a facile hydrothermal route. The highly preferentially oriented SnSe nanorods along [100] play a dominant role in scattering heat carrying phonons, resulting in ultralow lattice thermal conductivity (0.15 W m−1 K−1 at 873 K). The band alignment in the electronic structure of SnSe is promoted by Ge doping, contributing to a giant Seebeck coefficient and a largely enhanced power factor of 5.84 μW cm−1 K−2 at 873 K. An extraordinarily high peak ZT and a high average ZT are achieved within a wide temperature range for polycrystalline SnSe without involving toxic elements. Moreover, the reported material exhibits outstanding hardness and compressive strength induced by grain refinement. The high thermoelectric performance and mechanical properties of polycrystalline SnSe open realistic pathways for its widespread application in waste heat recovery and power generation.
研究领域:
材料科学
·
热电材料研究
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Jiani Xu,Zhongyi He,Liping Xiong,Yinglei Wu,Lei Guo,Lili Li,Renhui Zhang
A high yield of environmentally friendly N,S-codoped (N,S-CDs) and N-doping carbon points (N-CDs) carbon dots was achieved through a biochemical oxidation reaction at room temperature in this study. Acetaldehyde, sodium hydroxide, benzotriazole (BTA), and 2-mercaptobenzimidazole (MB) with a similar structure were used as raw materials. The microstructure and properties of the corrosion inhibitor for Q235 steel were evaluated by various experiments. The results demonstrated enhanced corrosion inhibition rates of the N,S-CDs compared to the N-CDs using electrochemical tests (93.83% vs 77.65%) and weight loss experiments (96.35% vs 91.65%) at 50 mg/L, respectively, compared to the blank material, indicating that N,S codoping can significantly improve the corrosion inhibition effect of carbon dots. The significant improvements were attributed to the formation of dense adsorption films and the hydrophobic properties of N and S-CDs nanoparticles on the steel surface, leading to an effective barrier against corrosion. The findings from this study provide important experimental data for potential industrial applications and hold important practical value in the field of pickling corrosion inhibitors.
研究领域:
材料科学
·
腐蚀与防护
·
工业应用
✓ 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）