MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Zihan Lei,Zijun Lu,Bo Hong,Xi Chen,Rongkang Yang,Mingming Wei,Shi Qiu,Xinqing Wang
Porous tremella-like In 2 O 3 /SnO 2 microspheres possess abundant oxygen vacancies. • In 2 O 3 /SnO 2 heterojunction narrows bandgap and enhances interfacial charge transfer. • In 2 O 3 /SnO 2 sensor shows ultra-sensitive ppb-level NO 2 detection performance at RT. • Superior RT NO 2 sensing performance stems from n-n heterojunction synergistic effects. • An intelligent sensing device based on the In 2 O 3 /SnO 2 sensor was built. The growing demand for ultra-sensitive, power-efficient NO 2 sensors in wearable and portable electronics has driven intense research, yet achieving reliable ppb-level detection at room temperature (RT) remains a major unresolved challenge. The In 2 O 3 /SnO 2 sensor overcomes this limitation through multiple synergistic effects arising from n-n heterojunction construction. The In 2 O 3 /SnO 2 heterojunction features a hierarchically porous morphology with larger specific surface area, enriched oxygen species and reduced E g . The In 2 O 3 /SnO 2 sensor displays outstanding NO 2 sensing performance with a response of 2209.77 toward 4 ppm NO 2 at RT, which is 250.82 times greater than that of the pristine In 2 O 3 sensor (8.81). More remarkably, the sensor realized an ultra-low theoretical limit of detection of 0.03 ppb, while still retaining a high response of 59.52 exposed to 500 ppb NO 2 . Moreover, the sensor demonstrated fast response/recovery kinetics, excellent selectivity, long-term stability, and remarkable humidity resistance. The superior performance is attributed to the multiple synergistic effects on morphological reconfiguration, bandgap narrowing, oxygen species enrichment, and vacancy-dominated unconventional charge transfer. An intelligent sensing device based on the In 2 O 3 /SnO 2 sensor was built with an innovative humidity compensation-based alarm logic, effectively reducing false alarms caused by humidity. This work provides new insights for the rational design of high-performance RT NO 2 sensors for practical applications. Download: Download high-res image (212KB) Download: Download full-size image
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INORGANIC CHEMISTRY
·
2026
·Vol. 65
·期 30
·17378-17391
·
IF 4.6
Wang Ying,Ma Yuyang,Cai Yimin,Yuan Lihua,Feng Wen,Cui Shuxun
N,O-Hybrid ligands featuring N-heterocyclic backbones
are promising
extractants for lanthanide separation, yet the governing role of N-donor
basicity in their complexation and extraction behavior toward trivalent
lanthanides remains less understood. This work investigates the effect
of N-donor basicity of two bipyridine- and bipyrimidine-based tetradentate
diamides, i.e., Et-Tol-BPDA and Et-Tol-BPymDA, on the coordination
and extraction of lanthanides. Results from solvent extraction experiments
indicate that both ligands extract light lanthanides via a cation-exchange
mechanism, while Et-Tol-BPymDA exhibits markedly higher selectivity
and efficiency with 1–6 M HNO 3 , achieving a La/Sm
separation factor of 90 at 3 M HNO 3 . The superior extraction
performance of Et-Tol-BPymDA over Et-Tol-BPDA stems from its enhanced
protonation resistance under acidic conditions, where the electron-withdrawing
effect of the extra bipyrimidine nitrogen atoms lowers the N-donor
basicity, allowing the ligand to retain its metal-binding capacity
even in highly acidic media, as validated by combined spectroscopic,
crystallographic, and theoretical analyses. The bonding analysis of
crystallographic and optimized complex structures confirms that amide
oxygen atoms serve as the primary coordination sites and produce shorter
metal–ligand bonds and stronger coordination interactions for
Et-Tol-BPDA. These findings unravel how the subtle variations in the
basicity of N-heterocycle modulate the coordination and extraction
properties of N,O-hybrid ligands toward trivalent lanthanides.
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IONICS
·
2026
·
IF 3.4
Xiang Yao
The development of efficient Metal-Nitrogen-Carbon (M-N-C) electrocatalysts is typically hindered by complex synthesis procedures and high-temperature treatments that often lead to active site aggregation. Herein, we report a facile, room-temperature plasma-driven strategy to engineer a high-performance Co 3 O 4 @GR-N composite, effectively circumventing these limitations. Unlike conventional thermal methods, this strategy utilizes a synergistic N 2 /H 2 plasma atmosphere to simultaneously achieve high-level N-doping of the graphene support and targeted enrichment of oxygen vacancies (O Vs ) in Co 3 O 4 . This dual-optimization creates a robust Co-N-C interface that electronically modulates the active sites while maximizing their exposure. Consequently, the optimized catalyst exhibits significantly enhanced Oxygen Evolution Reaction (OER) performance in alkaline media, delivering a current density of 10 mA cm − 2 at a low overpotential of 325 mV, significantly outperforming its thermally annealed counterparts. This work establishes the plasma strategy as a powerful, generalizable pathway for the precise defect engineering of advanced electrocatalysts without compromising structural integrity.
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Nature Communications
·
2026
·
IF 18.1
Zhai Mengde,Wu Tianhao,Du Kaihuai,Chen Cheng,Shibayama Naoyuki,Narmandakh Khongorzul,Khan Abdul Haseeb Hassan,Wang Ying-Chiao,Shang Juan,Staykov Aleksandar,Song Jun Tae,Ida Shintaro,Wang Pangpang,Yamada Sunao,Tamada Kaoru,Zhao Shuai,Wang Aili,Guo Zhanglin,Matsushima Toshinori,Miyasaka Tsutomu,Cheng Ming
Self-assembled molecules are widely used as bottom interfacial layers in inverted perovskite solar cells, yet their application to perovskite top surfaces remains poorly understood. Here, we develop two self-assembled molecules for perovskite surface modification and interfacial optimization with the hole transport layer. Through solvent engineering, ordered and uniform molecular packing is achieved on the perovskite surface. These molecules optimize surface energetics and promote efficient hole transfer when coupled with a homologous hole transport layer. Their large molecular dipoles tune interfacial energy alignment and reduce energetic offsets, thereby accelerating charge extraction from the perovskite layer. This dipole-driven interfacial modulation is effective in both normal and inverted device architectures. As a result, a power conversion efficiency of 26.18% (certified 26.23%) is achieved in normal-structure devices, together with improved operational stability under maximum power point tracking. This work establishes a viable strategy for perovskite surface engineering using self-assembled molecules.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Ruimeng Wang,Xinqi Luan,Jingyu Bao,Yaseen Muhammad,Syed Jalil Shah,Guanchen Wang,Jing Li,Guoyou Lin,Hongbing Ji,Zhenxia Zhao
High capacity adsorption of volatile organic compounds (VOCs) in high humidity environment is a crux but challenge for atmospheric VOCs governance. In this work, tubular carbonized N-doped polymers (TCNP) were implanted into MIL-101 via N-Cr-O interface self-assembly, enabling high adsorption for vapor toluene in high humidity. Through mechanical ball milling and carbonization, Cr ions were preloaded on TCNP to form highly dispersed 3–5 nm Cr-N crystallite as anchors for growing MIL-101(Cr/Cu). Newly constructed smaller micropores of 6.8 Å with aromatic rings/N sites at the interface and doped Cu ions in MOF framework synergistically enhanced π-π conjugation and electrostatic interaction for C 7 H 8 molecules. This endowed [TCNP 5 /MIL(Cr/Cu)] N-Cr 2.9 times higher toluene uptake (6.34 mmol/g) at low vapor pressure ( P / P 0 = 0.02) and 1.9 times diffusivity under high humidity (60% RH) than that of MIL-101(Cr) at 298 K. The adsorption breakthrough curves for vaporous toluene showed that TCNP@MIL-101(Cr/Cu) exhibited outstandingly higher adsorption equilibrium capacity (2.7 mmol/g) under 80% RH, corresponding to approximately 2–10 times than those of reported state-of-the-art adsorbents under similar conditions. This study provided a novel interface construction strategy for hydrophobic MOF composites, which supplied deeper understanding for VOCs adsorption and promoted MOFs practical application in VOCs capture under humid environment.
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IONICS
·
2022
·Vol. 28
·期 9
·4103-4110
·
IF 2.961
Liu Hui,Zhu Weichen,Zhou Hongyan,Wang Jianzhong
The development of dual-ion metal-free batteries is restricted by the strong self-discharge effect and dissolution of some anode active materials in the polar electrolyte. This in turn leads to low coulombic efficiency and discharge capacity loss. It is of great significance to alleviate this phenomenon through the redox reactions of polymeric active materials. In this study, a metal-free poly(anthraquinonyl sulfide)-graphite battery was constructed based on a pure N -butyl- N -methylpiperidinium bis(trifluoromethylsulfonyl)imide ionic liquid electrolyte. The cell had a discharge capacity of 70.5 mAh g −1 (0.1 C) and a capacity retention rate of 98.6% after 100 cycles, with a coulombic efficiency of 98.3% (1 C). Comparative studies proved that the self-discharge effect of poly(anthraquinonyl sulfide)-graphite batteries is weaker than that of some dual-graphite batteries. Cyclic voltammetry experiments revealed that the redox reaction was highly reversible. Most significantly, this type of poly(anthraquinonyl sulfide)-graphite batteries provides a new way for the design of metal-free dual-ion batteries with excellent long-term cycling performance and minimal self-discharge effect. Graphical abstract
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Peng Zuo,Yefeng Liu,Xiaolei Liu,Weizhou Jiao,Ruixin Wang
Based on the ever-growing interest of heteroatoms (e.g., P, N, S, transition metals) doping into molybdenum carbide and graphene for electrochemical reactions , herein, a ternary phosphomolybdic acid-polyethyleneimine/graphene oxide nanocomposite as a suitable precursor was developed to not only uniformly hybridize molybdenum and carbon source to perform the controllable in situ growth of well-defined molybdenum carbide nanostructure on graphene by annealing, but also synchronously dope N and P atoms into molybdenum carbide crystal lattice and graphene. The as-prepared hybrid showed remarkable electrocatalytic activity and high stability for hydrogen evolution reaction in basic media, due to the following favorable features, i.e. a large accessible active sites afforded by the ultrafine molybdenum carbide, the heteroatoms doped, the regulated electronic structure, the balanced thermodynamics between hydrogen adsorption and desorption , the accelerated charge/mass transfer ability by the ultrathin and defective carbon layer , and the protection of molybdenum carbide by carbon layer. As a result, it only needed a small overpotential of 47 mV to drive 10 mA cm −2 and a low onset potential of 10 mV, as well as a small Tafel slope of 56.8 mV·dec −1 , thus suggesting its promising potential for hydrogen evolution electrocatalyst .
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Dongju Fu,ZiYue Zhu,Jianjun Chen,Liqiang Ye,XinRui Song,XieRong Zeng
It is paramount important to design and explore excellent bifunctional oxygen electrocatalysts to conquer or weaken the shortcomings encountered by Zinc-air batteries at present. Herein, a novel N -doped hollow carbon tubes modified by uniform NiCo 2 O 4 nanocrystals ( N -HCTs@NiCo 2 O 4 ), has been developed as an extremely efficient bifunctional catalyst. The hollow structure of N -HCTs possesses a large specific surface area of 610.60 cm g −1 which provides abundant active N -dopant sites for the oxygen reduction reaction, whereas the NiCo 2 O 4 nanocrystals serve as the positive phase for the oxygen evolution reaction. It is found that the efficient bifunctional activity is obtained by establishing a coupling interface between N -HCTs and NiCo 2 O 4 . The N -HCTs@NiCo 2 O 4 composite has a half-wave potential of 0.81 V toward ORR and the overpotential of 330 mV at a current density of 10 mA cm −2 toward OER as compared with noble metal catalysts. The N -HCTs@NiCo 2 O 4 as the cathode catalyst for Zinc-air batteries exhibits superior peak power density (150 mW cm −2 ), specific capacity up to 779 mAh g −1 , and good stability even after 100 h of cyclic charge/discharge cycles N -HCTs@NiCo 2 O 4 has good prospects for practical applications of non-precious metal catalysts in the cathode of Zinc-air batteries.
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FOOD CHEMISTRY
·
2021
·
IF 7.514
Jing Li,Kunpeng Gao,Francesco Secundo,Xiangzhao Mao
Chitin, one of the most abundant renewable biopolymers on Earth, is commercially available from crustacean wastes. One critical step in converting chitin to high-value products is its degradation by chitinolytic enzymes to N -acetyl- d -glucosamine (GlcNAc), which plays a significant role in functional food and pharmaceutical industries. Here, we cloned and biochemically characterized two novel β - N -acetylglucosaminidases named SvNag2557 (family-84) and SvNag4755 (family-3) from Streptomyces violascens ATCC 27968. Both SvNag2557 and SvNag4755 exhibited strict substrate specificity toward N -acetyl chitooligosaccharides with GlcNAc as the sole product. Thus, a one-pot production for pure GlcNAc from chitin by an enzyme cocktail reaction was further developed. Under the co-action of an endo-type chitinase SaChiA4 and SvNag2557 (mass ratio 1:2), the final conversion rates of colloidal chitin and ionic liquid pretreated chitin to GlcNAc were 80.2% and 73.8% with GlcNAc purities of 99.7% and 96.8%, respectively.
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ACS ES&T Engineering
·
2020
·
IF 0
Yuxian Wang,Nuo Ren,Jiaxin Xi,Ya Liu,Tao Kong,Chunmao Chen,Yongbing Xie,Xiaoguang Duan,Shaobin Wang
High-performance and robust catalysts act as core drivers for advanced oxidation technologies for decontamination of water resources. In this study, we used a facile strategy to prepare magnetic and N-doped carbon nanotubes with cobalt encapsulation (Co–N@CNTs) to catalyze ozone for decomposition of aqueous organic pollutants. By regulating the thermal conditions during the synthesis, the derived Co–N@CNTs manifested maneuvered adsorption capabilities. The embedded Co nanoparticles (NPs) not only afforded carbon nanotubes with a magnetic property but also significantly boosted catalytic ozonation due to the synergistic coupling of the Co interface and N-doped graphitic layer. Formation of such a coordinating structure accelerated electron transfer at the interface and increased the conductivity of surface carbon to coordinate a redox reaction. Density functional theory (DFT) calculations and experimental evidence confirmed that cobalt coupled with graphene with pyridinic N dopants was the most favorable structure, which remarkably enhanced ozone adsorption and its dissociation to generate reactive oxygen species (ROS). Intriguingly, the catalytic ozonation underwent different nonradical regimes dependent on the molecular structures of target organics. In terms of ROS, surface-adsorbed atomic oxygen (*Oad) was responsible for degradation of oxalic acid, while phenolics were primarily degraded by O3 molecules and singlet oxygen (1O2). This study provides a cost-efficient and recyclable carbocatalyst for wastewater decontamination and new insights into the structure–functional relationships in carbon-based advanced oxidation processes.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Xiuru Yang,Zhi Chen,Wan Zhao,Chunxi Liu,Xiaoxiao Qian,Wenya Chang,Tao Sun,Cai Shen,Guoying Wei
Porous-hydrangea x%BiOBr/BiOI n-n heterojunction with ordered morphology was successfully prepared through a simple solvothermal process using Bi(NO 3 ) 3 ·5H 2 O, KBr, BiOI, and ethylene glycol as the precursors. The prepared x%BiOBr/BiOI (x = 2, 5, 10, 15 mol ratio) n-n heterojunctions exhibit enhanced photodegradation properties during treatment of tetracycline hydrochloride (TC-HCl) under visible light irradiation. The highest efficiency at optimized x = 5 is 1.3-, 1.7- and 1.3-fold higher than that of the pristine BiOI, BiOBr, and commercial titanium dioxide (P25), respectively. The improved photocatalytic performance was assigned to the optimized charge-separation properties of n-n heterojunction. However, over-loading of BiOBr upon BiOI may restrain the access of light to BiOI, which could limit the light absorption. The active species have been investigated by trapping experiments and it was found that holes (h + ) and superoxide radicals (∙O 2 - ) were mainly responsible for the photodegradation of TC-HCl. Additionally, the structure and activity relationship were systemically investigated, and the formation of n-n heterojunction is discussed accordingly. The photodegradation of TC-HCl is proved to be a complete mineralization process and the reaction mechanism is also proposed.
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ANALYTICA CHIMICA ACTA
·
2021
·
IF 6.558
Lvxia Zhang,Hui Ouyang,Dan Zhang,Zhifeng Fu
Novel cobalt-based metal-organic frameworks (Co MOFs) were synthesized by a facile “controlled synthesis” strategy. The MOFs displayed superior catalytic performance on the chemiluminescent (CL) reaction between N -(4-aminobutyl)- N -ethylisoluminol (ABEI) and H 2 O 2 . UV–vis absorption, CL spectrum, ESR, and radical scavenger experiments were conducted for clarifying the catalytic mechanism of Co MOFs. All results revealed that Co MOFs can accelerate decomposition of H 2 O 2 and production of OH • , O 2 • − as well as 1 O 2 radicals. The rapid reaction between these reactive oxygen species and ABEI resulted in the generation of ABEI-ox∗. The excited-state oxidation product emitted a very intensive CL signal with a maximal emission wavelength of 430 nm as it returned to the ground state. To explore their application potential in CL assay, Co MOFs were used as powerful CL reaction catalyst for establishing a very sensitive method for immunoassay of aflatoxin B 1 . The detection range was 0.05–60 ng mL −1 , and the limit of detection was 4.3 pg mL −1 . The result for detecting herbal medicine samples demonstrates the acceptable reliability of the Co MOFs-based CL immunoassay. The proof-of-principle work verifies the application potential of Co MOFs on boosting intensive CL signal, and meets the demand for high sensitivity in various bioassay fields.
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