CARBON
·
2026
·
IF 12.7
Lu Luo,Shuxin Zou,Gangqi Lin,Jing Zhang,Diwei Shi
B/N/O co-doped hierarchical porous carbons were derived from waste shrimp shells. • SHPC-800 delivers an impressive specific capacitance of 426.8 F/g at 0.5 A/g. • SC device achieves a remarkable energy density of 19.58 Wh/kg at 750 W/kg. • DFT reveals differential contributions of functional groups to K adsorption capacity. The rational design of carbon derived from biomass for supercapacitors requires a deep understanding of the synergistic interplay between heteroatom doping and pore architecture. Herein, an integrated “pretreatment-co-doping-synchronous activation” strategy was proposed to fabricate B/N/O co-doped hierarchical porous carbon (SHPC) from waste shrimp shells. Leveraging the natural CaCO 3 as a template and exploiting etching effect of KOH and ammonium pentaborate tetrahydrate, the optimized SHPC-800 electrode exhibits a specific surface area of 612 m 2 /g, featuring a well-developed micro-/mesoporous network. The B/N/O co-doping upgrades the capability of the electrode by introducing additional pseudocapacitance and improving electronic conductivity, resulting in an exceptional specific capacitance of 426.8 F/g at 0.5 A/g. Moreover, a symmetric supercapacitor constructed with SHPC-800 demonstrates a remarkable energy density of 19.58 Wh/kg at 750 W/kg, along with extraordinary cycling stability. Additionally, density functional theory (DFT) results further reveal that the contributions of different functional groups to K atom adsorption and electronic regulation vary significantly, and that the performance depends not merely on the type or total amount of dopants but critically on the bonding configuration and coordination environment. These findings provide valuable insights for the structural regulation and performance optimization of porous carbons. This work not only advances the theoretical framework of heteroatom incorporation and pore architecture synergy in biomass-derived carbons but also provides a viable pathway for valorizing seafood waste into high-value electrode materials for next-generation energy storage systems. Download: Download high-res image (446KB) Download: Download full-size image
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高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Tuohetijiang Baiheti,Abudukadi Tudi,Minqiang Gai,Xuping Wang,Shujuan Han
Fluorooxoborates are promising yet largely untapped crystal materials for linear and nonlinear optical applications. The introduction of a strong electronegative F atom into an oxyboron anionic group offers a virtually unlimited chance for structural engineering and ultimately purposeful tuning of the macroscopic optical properties of the crystal. Herein, a new mixed alkali/alkaline-earth fluorooxoborate, Na2BaB12O18F4, was synthesized in a closed system. Na2BaB12O18F4 features a [B6O11F2] fundamental building unit (FBB), which polymerizes into two new (first example) independent interpenetrating three-dimensional (3D) B–O/F anionic networks constructed entirely from BO3 and BO3F units. Based on optical characterizations and the first-principles calculations, Na2BaB12O18F4 exhibits a moderate birefringence (0.054 @ 1064 nm) and a short ultraviolet (UV) cutoff edge (below 190 nm). The successful synthesis and characterization of Na2BaB12O18F4 may speed up the subsequent discovery of other mixed alkali/alkaline-earth metal fluorooxoborates.
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PubMed
高影响因子
Solar RRL
·
2023
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IF 7.9
Zihao Wang,Chengwu Shi,Rui Cao,Kai Lv,Changsheng Ye,Wangchao Chen,Guiju Hu,Fuling Guo,Yanqing Wang
Herein, Na 2 SSeO 3 solutions are prepared by hydrothermal method at 140 °C for 8 h using Se powder and Na 2 SO 3 solution (the molar ratios of Se:Na 2 SO 3 = 1:4, 1:5, 1:6) and the chemical composition of Na 2 SSeO 3 solutions is analyzed by X-ray photoelectron spectroscopy. Sb 2 S y Se 3− y thin films are prepared by chemical bath deposition (CBD) at 90 °C for 5 h and subsequently annealed at 375 °C for 10 min and etched by N -butyldithiocarbamic acid solution in DMF. The effect of the Na 2 SSeO 3 solution, growth solution volume, etching on the thickness and chemical composition of Sb 2 S y Se 3− y thin films, and the power conversion efficiency (PCE) of the corresponding solar cells is systematically investigated. The result reveals that the Na 2 SSeO 3 solutions may be the mixing solutions containing Na 2 SSeO 3 , Na 2 S 2 SeO 6 , Na 2 S 2 Se 2 O 6 , Na 2 Se. When the molar ratio of Se:Na 2 SO 3 and growth solution volume is 1:5 and 56 mL and the Sb 2 S y Se 3− y thin films with annealing are etched, the PCE of Sb 2 S y Se 3− y solar cells is 8.00% with spiro-OMeTAD and 8.43% with spiro-OMeTAD:TMT-TTF. The PCE of 8.43% is the highest value for Sb 2 S y Se 3− y solar cells using CBD and demonstrates that the composition engineering is an important strategy for improving the PCE of Sb 2 S y Se 3− y solar cells using CBD.
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Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 35
·19091-19106
·
IF 11.9
Xiaoyun Chen,Pengkun Zhang,Dong-Hau Kuo,Qinhan Wu,Adugna Boke Abdeta,Binghong Wu,Zhengjie Su,Longyan Chen,Osman Ahmed Zelekew,Jinguo Lin
Herein, we demonstrated S2− anion incorporation into BiVO4 for converting an oxidative-type BiVO4 photocatalyst into a reductive-type BiV(S,O)4−x (labeled BiVOS) sulfo-oxide photocatalyst for efficient N2 fixation under an ambient environment. BiVOS-2 not only exhibited the highest NH3 production rate of 563.6 μmol g−1 h−1 without sacrificial agents and with durable stability but also had an apparent quantum efficiency (AQE) of 2.18% at 420 nm and a solar-to-ammonia (STA) conversion efficiency of 0.071% in pure water under AM1.5G light irradiation. At the same time, the sulfur-free BiVO4 can't realize N2 to NH3 conversion. The S2− doping introduced Vo, which converted V5+ around Vo into V4+ to keep the electrical neutrality. The active atoms V4+ were exposed and activated N2, and the electron hopping between V5+ and V4+ improved electron transfer. Density functional theory (DFT) calculation indicates that S2− anion doping can enhance adsorption energy, elongate the NN bond of the adsorbed N2 molecule, and facilitate electron transfer to the antibonding orbital of the N2 molecule, leading the BiVOS sulfo-oxide catalyst to have excellent N2 fixation activity. This study provides a promising method for converting an oxidative-type catalyst into a reductive catalyst to extend material applications.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
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IF 9.221
Xia Zhou,Xiaoling Lin,Haiqiu Huang,Ping Li,Jiamin Wu,Xueqin Huang,Huaihong Cai,Hai Han,Junxia Zheng,Haibo Zhou
Visual, highly selective, and sensitive detection of sulfur dioxide (SO 2 ) and its derivatives (SO 3 2- ) in vitro/in vivo is of great significance in maintaining cell homeostasis. A new Au@Ag@ZIF-8 optical sensor with o-phenylenediamine (OPD) internal coding surface-enhanced Raman scattering (SERS) tags based on the free radical reaction was synthesized for multi-mode detection of sulfite . First, Co 2+ is oxidized to Co 3+ . Second, the oxidoreduction between SO 3 2- and Co 3+ produces SO 4 -• and Co 2+ to complete the cycle. The resulting SO 4 -• is further reacted with the chromogenic substrate OPD to form the polymer. Due to the UV–vis absorbance of OPD polymer being stronger than that of OPD, but the fluorescence intensity is lower, and their Raman peaks are obviously different, this sensor can be used for the detection of SO 3 2- through colorimetric, fluorescence, and Raman multi-mode. The main advantages are as follows: (1) high selectivity; (2) achieve fast, visual, and highly sensitive detection of SO 3 2- , and the low limit of detection (LOD) is 1 nM; (3) improve the reliability of detection and expands the detection range (1 nM-800 μM); (4) demonstrate the applicability in recognizing SO 3 2- in HeLa cells to provide accurate information on the dynamic distribution of sulfur in cells.
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FOOD HYDROCOLLOIDS
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2022
·
IF 11.504
Shahid Iqbal,Ping Zhang,Peng Wu,Quanyi Yin,Khemayanto Hidayat,Xiao Dong Chen
In this study, W/O emulsions incorporated with various proportions of two hydrocolloids , namely, methylcellulose (MC) and hydroxypropyl methylcellulose (HPMC), were prepared. The shear viscosity, microstructure, and lipolysis of the W/O emulsions before and during in vitro digestion in the dynamic (DIVHS) and semi-dynamic gastrointestinal models were evaluated and compared. The shear viscosity of both emulsions increased with the addition of MC and HPMC content up to a certain limit (0.5–2%), whereas it significantly decreased at a higher addition level (4%) due to the increased flocculation and coalescence in higher cellulose ethers. The HPMC emulsions (2 wt % in aqueous phases) showed higher viscosity and larger droplet size than the equivalent MC emulsions before and during simulated digestion, accompanied by the lower extent of lipolysis. These results are in line with the formation of a more compact and stronger gel structure in HPMC emulsions, which could retard lipase adsorption at the W–O interface. For both emulsions at the same concentration (40 wt%), a higher extent of free fatty acid (FFA) release was found during digestion in the dynamic system (HPMC ꞊ 62%, MC ꞊ 72%) compared to that in the semi-dynamic model (HPMC ꞊ 58%, MC ꞊ 70%). This behavior was supported by the smaller droplet size of emulsions digesta collected from the dynamic system having a larger surface area. Overall, the present study suggested that the dynamic DIVHS system was more effective in enzymatic hydrolysis of the W/O emulsions investigated than the semi-dynamic model under the current experimental conditions. This work had provided valuable insights into the modulation of the structural and digestive properties of W/O emulsions by the addition of MC and HPMC, which could be meaningful for the development of healthier emulsion-based food products ( e.g ., margarine and spreads) with reduced lipid digestibility.
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Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Xin Li,Yuling Shan,Xiaolei Zhang,Shilei Zhao,Wenlong Yu,Yibin Liu,Hongrui Shang,Peilong Tang,Shusen Wang,Junwei Ding
Both increasing emission of chlorophenol chemicals and plastic waste pollution are severe global environmental challenges, which is worth being explored to respond with a "waste eliminated by waste" coupling treatment strategy. Herein, we propose a one-step recyclable nano-MgO template strategy to prepare in-situ N, O-doped novel porous carbon coral reefs (PCNCR) directly derived from the mixture of real waste PET and melamine formaldehyde resin. The template precursor can be conveniently recycled by facile acetic acid pickling, vacuum evaporation and drying, and the whole preparing process does not involve any toxic solvents, massive consumption of pore-forming agents, or discharge of salty wastewater. The obtained PCNCRs have hierarchical porous structures and abundant N, O-doped species, and the textural parameters can be modulation linearly by varying the mass ratio of magnesium acetate to mixed waste plastics. The optimized PCNCR-1.25 exhibited remarkable adsorption capacity for chlorophenol contaminants (777.5 mg/g for 4-Chloro-3,5-dimethylphenol, PCMX and 538.74 mg/g for 4-Chloro-3-methylphenol, PCMC) in aqueous solution. Adsorption isotherm fitting studies revealed chlorophenol contaminants tended to be rapidly adsorbed on the PCNCR surface in the form of monolayer. And the system reached adsorption equilibrium at about 15 min, which was described by linear driving force model. Reusability test verified that PCNCR-1.25 had excellent adsorption stability for chlorophenol in continuous adsorption-regeneration cycles. DFT calculation illustrated the enhancement of chlorophenol adsorption by heteroatom species, especially nitrogen dopants. This work highlighted a low-cost and sustainable approach to defuse the dual environmental threat of chlorophenol emissions and plastic waste pollution simultaneously.
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OPTICAL MATERIALS
·
2023
·
IF 3.9
Ke Sun,Haibin Lin,Rui Zhang,Jinlong Zhu,Liping Wang,Songbai Han,Xiaofei Wang
The emerging laser-driven phosphor-converted white laser diodes (w-LDs) demand highly efficient and thermally stable color converters. To this end, the Ce 3+ luminescence in the rekindled La–Si–O–N host, and the impacts of NH 4 Cl flux and post-processing are investigated systematically. On the basis of the XRD results, well crystalline Ce 3+ -doped La 5 Si 3 O 12 N and LaSiO 2 N are obtained at 1600 °C for 5 h and 1500 °C for 4 h, respectively. Impressively, the representative La 5 Si 3 O 12 N:0.04Ce 3+ and LaSiO 2 N:0.03Ce 3+ exhibit a broad excitation band from 240 nm to 400 nm, peaking at around 360 nm, which is well matched with emission from near-UV (n-UV) chip. Under excitation by a n-UV laser, the La 5 Si 3 O 12 N:0.04Ce 3+ and LaSiO 2 N:0.03Ce 3+ produce bright blue light in a wide emission band from 360 nm to 550 nm. The CIE chromaticity diagram reveals the tunability of the hue of these phosphors. The quenching temperature is determined to be 396 K and 429 K for La 5 Si 3 O 12 N:0.04Ce 3+ and LaSiO 2 N:0.03Ce 3+ respectively, indicating superior thermal stability. The addition of 3 wt% NH 4 Cl flux much enhances the emission intensity of both La 5 Si 3 O 12 N:0.04Ce 3+ and LaSiO 2 N:0.03Ce 3+ . Furthermore, the post-treatments markedly improve the luminescence properties by increasing the crystallinity , reducing the surface defect , and changing the morphology. Therefore, it is believed that the present work has promising applications in LD lighting and promoting the development of laser display.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Ran Wang,Chong Cai,Di Wang,Zhiwei Liu,Lili Gao,Tifeng Jiao
In this work, a new type of self-assembled phytic acid-graphene oxide composite foam (PAGF) was prepared by hydrothermal method. In addition, Au nanoparticles (Au NPs) and Fe 3 O 4 particles were loaded onto PADF to obtain PAGF@Au&Fe 3 O 4 composite by a simple one-step method. The addition of graphene oxide (GO) can effectively prevent the agglomeration of Au NPs and weaken its surface passivation. The results of SEM, XRD, XPS and BET proved the successful preparation of the composite and its large specific surface area. Moreover, the synthesized PAGF@Au&Fe 3 O 4 composite showed good catalytic performance for p-nitrophenol (4-NP) and o-nitroaniline (2-NA) solutions with the rate constant (k) values of 0.0799 min −1 and 0.0546 min −1 , respectively. Due to the addition of Fe 3 O 4 , the composite exhibited good stability and recyclability, and maintained high catalytic efficiency after 8 cycles of catalytic process. The current work provides new ideas for developing novel graphene oxide-based composite materials and their catalytic degradation of organic pollutants.
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FUEL
·
2020
·
IF 5.578
Tianjin Li,Hongfei Lin,Xinping Ouyang,Xueqing Qiu,Zechen Wan,Tao Ruan
The selective cleavage of C–O bond in lignin is the key to convert them into aromatic compounds and then to produce liquid fuels and chemicals. N-doped carbon nanosheets were obtained by direct pyrolysis of glucosamine hydrochloride (GAH) and melamine. Highly-dispersed and small-sized Ru nanoparticles (NPs) supported N-doped carbon by impregnation method, which can efficiently convert lignin to obtain 40.70% aromatic monomers. It was 2.3 times than that of the commercial catalyst (Ru/C) and the catalyst could be used at least five runs with an insignificant loss in the yield of aromatic monomers. The morphology, specific surface area, nitrogen species and content of supports could be tuned by controlling the weight of melamine. The results showed that the melamine and GAH were condensed to form layered graphitic carbon nitride (g-C 3 N 4 ) and a carbon skeleton at 600 °C, respectively. Then, the produced N from the decomposition of g-C 3 N 4 at high temperature (>700 °C) could improve nitrogen concentration, increase the specific area and result in the graphene-like wrinkled morphology. The presence of pyridinic N not only served as metal coordination sites to stabilize and disperse Ru NPs but also enhanced the proportions of Ru 0 through the electronic interactions. The DFT calculations implied that the pyridinic N contributed to the highest adsorption energy for 2-phenoxy-1-phenethanol (PPE) and a reduction of the disassociation energy for C alkyl –O bond compared with graphite N and pure C.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Yan Zhao,Min Song,Qi Cao,Peizhe Sun,Yonghao Chen,Fanyue Meng
CuFe 2 O 4 nanoparticles are decorated on biochar (BC) by modified sol-gel method to form the CuFe 2 O 4 @BC catalyst for persulfate (PS) activation in a wide pH range. The application of CuFe 2 O 4 @BC for o -nitrochlorobenzene degradation in soil was explored in this study. The mechanism of heterogeneous PS activation was comprehensively investigated. The synergistic effects between CuFe 2 O 4 and BC could enhance catalytic activity and stability, including well dispersed CuFe 2 O 4 species, efficient electron transfer and abundant oxygen functional groups. The superoxide radicals (O 2 − ) produced from CuFe 2 O 4 and BC could mediate Cu(I)/Cu(II) and Fe(II)/Fe(III) redox pairs on CuFe 2 O 4 @BC surface to activate PS, and then generating •OH and SO 4 − continuously. Moreover, the reaction intermediates are identified as well to elucidate the possible degradation pathways. These findings help to achieve more comprehensive understanding of the heterogeneous activation process of PS by CuFe 2 O 4 @BC catalyst.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Hairus Abdullah,Riski Titian Ginting,Refi Ikhtiari,Noto Susanto Gultom,Hardy Shuwanto,Dong-Hau Kuo
Configurational entropy composites of In-doped Zn(O,S)/Zn-doped In(OH) 3-x S x has been synthesized with a one-step hydrothermal method and carefully characterized with XRD , XPS , SEM, TEM, DRS , PL , EIS , TPC , CV , and MS analyses. The composites were prepared with different sulfur amounts to obtain the optimum performance of visible-light photocatalytic HER . The primary phases of ZnS and In(OH) 3 were formed after the hydrothermal process. However, the results indicated In and O were doped into ZnS lattice and induced lower bandgap values (~2.71–2.84 eV) which are active in visible-light illumination. Simultaneously, the excess Zn and S were also doped to In(OH) 3 with lower bandgap values (~3.38–4.63 eV). The variation of bandgap values is due to the hybridization of In 5s5p to Zn 4s4p and O 2p to S 3p orbitals. As a result, In-doped Zn(O,S) and Zn-doped In(OH) 3-x S x will be a visible-light active material for photoreaction and a favorable phase for electron transfer , respectively. Furthermore, it is also related to a possible antisite-defect formation with I n Z n + to help the electron trapping and enhance the photocarrier separation, leading to an efficient photocatalytic activity . ZI-S1 with additional 5-mmol thioacetamide was found as the catalyst with the highest HER performance which achieved 730 μmol/g·h under visible-light illumination. A plausible photocatalytic HER mechanism is discussed and proposed in this work.
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