SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Yaotian Yan,Shenghong Li,Liumo Jiang,Ruqian Peng,Jiamin Li,Xiaoju Cui,Mo Zhang,Dehui Deng,Guiqiu Wang,Xuhui Geng
Electrochemical sensor for S 2- based on a novel anti-sulfur poisoning strategy of “chainmail for material” was developed. Nitrogen-doped graphene-encapsulated cobalt-nickel nanoparticles (CoNi@NGs) was synthesized and used as sensing material. The graphene shells can physically isolate the core metal from the external environment to prevent formation of metallic sulfides and corrosion. In addition, CoNi@NGs is sulfurophobe and therefore repels sulfur, resulting in a self-cleaning process. Therefore, the developed sensor exhibited much better anti-sulfur poisoning performance than those reported in the literatures, as the current didn’t decrease after continuous detection of S 2- 80 h with a self-developed on-line flow measurement system. The sensor had a wide S 2- detection range (from 0.5 to 1000 μM) with LOD of 0.47 μM (S/N=3). It was worth mentioning that the sensor showed excellent specificity to S 2- with selectivity of more than 100 to the common interfering substances in water. Finally, the developed sensor was applied to detect S 2- in real water samples including industrial wastewater, pond water and seawater with recoveries of 86.9–118.1 %.
研究领域:
材料科学
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电化学传感
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环境监测
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Wenjing Wang,Shenghong Li,Liumo Jiang,Xiaoju Cui,Yan Gao,Haijing Ning,Qinglian Li,Xiaolin Jiang,Mo Zhang,Dehui Deng,Yang Shu,Jianhua Wang,Yafeng Guan,Xuhui Geng
The susceptibility of sensors to sulfur poisoning is the biggest challenge when monitoring high concentrations of hydrogen sulfide (H 2 S). In order to solve this problem, a portable detection instrument based on electrochemical sensor was developed. The “chainmail” catalyst of graphene-encapsulated cobalt-nickel nanoparticles (CoNi@NGs) was synthesized and doped with conductive carbon black (CCB) as sensing material. The graphene shell could protect core metal from sulfur poisoning. The anti-sulfur poisoning performance of the developed instrument reached the best level in literature. After 60 days of intermittent detection of 100 ppm H 2 S or on-site monitoring in wastewater treatment tank, the signals only decreased by 1.3 % and 1.6 %, respectively. By doping CCB, a porous structure was constructed on the working electrode membrane (WEM), which reduced the response and recovery time by 87.9 % and 77.0 %, to 14 s and 24.5 s, respectively. In addition, the instrument had a wide detection range (20 ppb-700 ppm), high sensitivity (0.580 μA/ppm) and limit of detection (LOD) of 0.52 ppb (3σ). Finally, the instrument was applied to monitor of H 2 S in wastewater treatment tank and sewage sewer of an institute, which showed that the instrument had broad application prospects for on-site monitoring of H 2 S in real environments.
研究领域:
环境科学
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传感器技术
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Yufan Jiang,Yanfei Zheng,Cangpeng Shan,Ning Hou,Hao Wang,Qinwei Jia,Rui Han,Qingling Liu,Weichao Wang
Catalytic hydrolysis reaction is an effective technology for treating industrial waste gas carbon disulfide (CS 2 ). However, catalyst deactivation caused by passivation of active sites and sulfate-induced sulfur poisoning remains a key obstacle to this technology. Here, a ternary composite system of Ti 0.05 Ce 0.8 La 0.2 O x was successfully constructed. Titanium dioxide (TiO 2 ) was incorporated into the Ce 0.8 La 0.2 O x solid solution through mechanical grinding. The Ti 0.05 Ce 0.8 La 0.2 O x catalyst achieved the complete conversion of CS 2 at 140 °C and maintained stable performance within 320 h of continuous operation, which was significantly superior to the Ce 0.8 La 0.2 O x catalyst and previous reports. The research found that the incorporation of TiO 2 increased the diversity and density of surface hydroxyl groups (-OH), promoting the adsorption and dissociation of CS 2 . Meanwhile, it induced more lattice distortions, significantly increasing the concentration of oxygen vacancies in the catalyst and providing efficient active sites for the dissociation of water molecules (H 2 O). Importantly, the weak acidity of TiO 2 effectively regulates the distribution of basic sites on the catalyst surface, thereby reducing H 2 S adsorption and oxidation side reactions, and simultaneously inhibiting the irreversible accumulation of sulfates/sulfides. Therefore, this study provides valuable insights for the development of industrial-grade long-lasting organic sulfur hydrolysis catalysts.
研究领域:
催化化学
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环境工程
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材料科学
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工业催化
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无机化学
✓ 已验证
产品关联
DOI
高影响因子
ChemSusChem
·
2018
·Vol. 11
·期 15
·2593-2603
·
IF 7.411
Jingwei Li,Bo Wei,Xing Yue,Zhe Lü
The low performance and insufficient catalytic activity of perovskite anodes hinder their further application in intermediate-temperature solid-oxide fuel cells (IT-SOFCs). A novel La 0.8 Sr 0.2 Fe 0.9 Nb 0.1 Pd 0.04 O 3− δ (LSFNP) anode material has been developed with Fe–Pd co-exsolutions for IT-SOFCs. Fe 0 and Pd 0 metallic nanoparticles are confirmed to exsolve on the surface of the perovskite anode during operation under a hydrogen atmosphere. The introduced Pd exsolutions promote the charge-transfer process slightly and the H 2 -adsorption ability of the La 0.8 Sr 0.2 Fe 0.9 Nb 0.1 O 3− δ (LSFN) parent anode significantly, as metallic Pd is a conductor with excellent catalytic activity and an absorber of hydrogen that can absorb a large amount of H 2 by forming unstable chemical bonds. A single cell with the LSFNP anode exhibits high output performance (maximum power density of 287.6 mW cm −2 at T =800 °C by using humidified H 2 as the fuel), excellent redox stability, and considerable coking and sulfur tolerances. After the introduction of Pd exsolutions, the increase in the electrochemical performance is more significant under low H 2 concentrations and at low temperatures with a maximum power density ratio of the LSFNP anode cell/LSFN anode cell reaching 18 under 5 % H 2 /argon at T =650 °C. Pd-decorated LSFNP is a high-performance, redox-stable, coking-tolerant, and sulfur-tolerant anode material for IT-SOFCs, making Pd exsolution a reliable nanodecoration strategy to improve the low kinetics of perovskite anodes. Graphical Ex marks the spot : The La 0.8 Sr 0.2 Fe 0.9 Nb 0.1 Pd 0.04 O 3− δ (LSFNP) anode material with Fe–Pd co-exsolutions for intermediate-temperature solid-oxide fuel cells is prepared. The exsolved Fe 0 and Pd 0 co-exsolutions promote the charge-transfer process and H 2 -adsorption ability of the La 0.8 Sr 0.2 Fe 0.9 Nb 0.1 Pd 0.04 O 3-δ (LSFNP) anode. LSFNP anode exhibits high performance, good redox-stability, good coking and sulfur tolerance. A maximum power density of 287.6 mW cm −2 is obtained at 800 °C using humidified H 2 as the fuel. SDC=Sm 0.2 Ce 0.8 O 2− δ .
研究领域:
材料科学
·
能源化学
·
电化学
·
功能材料
·
催化化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）