Chi He

Chi He
Xi'an Jiaotong University | XJTU · Department of Environment Science and Technology

PhD

About

193
Publications
9,018
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
5,514
Citations

Publications

Publications (193)
Article
The evaluation of the poisoning effect of complex components in practical gas on DCM (dichloromethane) catalytic ozonation is of great significance for enhancing the technique's environmental flexibility. Herein, Ca, Pb, As, and NO/SO2 were selected as a typical alkaline-earth metal, heavy metal, metalloid, and acid gas, respectively, to evaluate t...
Article
A kind of adsorbent (Hydrogel-I) derived from sodium alginate and the modified alkaline lignin (MAL) has been proved to possess a good adsorption performance for Pb(II)-loaded wastewater based on batch experiments. However, the practical removal of Pb(II)-loaded-wastewater is a continuous and dynamic process. Herein, Hydrogel-I was further evaluate...
Article
Pyrolysis of oily sludge (OS) is an alternative for energy recovery with less pollutants. However, the migration of nitrogen and sulfur during pyrolysis process remain challenges for environmental concern and subsequent utilization of the recovered fuel. In this work, stage pyrolysis experiments of polyacrylamide (PAM) and sodium dodecyl sulfonate...
Article
In order to enhance the catalytic activity and improve the stability of Mn-Al oxides in acetone oxidation, it is interesting to have found that modulating and accelerating the rate-limiting step by Al substitution rather than just mixing of Mn and Al is crucial for hydrocarbon efficient catalytic destruction. Here, a series of Mn-Al oxides with dif...
Article
As a primary type of clean energy, methane is also the second most important greenhouse gas after CO2 due to the high global warming potential. Large quantities of lean methane (0.1–1.0 vol%) are emitted into the atmosphere without any treatment during coal mine, oil, and natural gas production, thus leading to energy loss and greenhouse effect. In...
Article
Effective desorption of chlorine species is critical for hindering the formation of chlorinated intermediates in the catalytic destruction of chlorinated volatile organic compounds (CVOCs). Here, Ru/MnCo3Ox catalysts with excellent activity, reaction durability and superior chlorine transformation ability for 1,2-dichloroethane (1,2-DCE) destructio...
Article
The development of novel and efficient monolithic catalysts is of great significance to fulfill the catalytic destruction of industrial volatile organic compounds. Here, a series of CoCexZr1−x/Ni foam (NF) monolithic catalysts were successfully prepared and applied for ethyl acetate (EA) combustion. Among them, CoCe0.75Zr0.25-NF possesses the highe...
Article
Realizing the simultaneous adsorption and activation of O2 and reactants over supported noble metal catalysts is crucial for the oxidation of organic hydrocarbons. Herein, we report a facile one-step ethylene glycol reduction method to synthesize difunctional Au(OH)Kx sites, which were anchored on a hierarchical hollow MFI support and adopted for a...
Article
Ammonia (NH3) is a critical component causing environmental problems like haze and water pollution. Selective catalytic oxidation of ammonia (NH3-SCO) to N2 and H2O is a promising method to abate NH3 emission. However, inferior SO2 tolerance is still a tremendous challenge to be conquered for present NH3-SCO catalysts regarding practical applicatio...
Article
The development of highly active single‐atom catalysts (SACs) and identifying their intrinsic active sites in oxidizing industrial hazardous hydrocarbons are challenging prospects. Tuning the electronic metal‐support interactions (EMSIs) is valid for modulating the catalytic performance of SACs. Herein, we propose that the EMSIs modulation of a Pt1...
Article
The development of highly active single‐atom catalysts (SACs) and identifying their intrinsic active sites in oxidizing industrial hazardous hydrocarbons are challenging prospects. Tuning the electronic metal‐support interactions (EMSIs) is valid for modulating the catalytic performance of SACs. Herein, we propose that the EMSIs modulation of a Pt1...
Article
Full-text available
Zeolite-confined metal nanoparticles (NPs) have attracted much attention owing to their superior sintering resistance and broad applications for thermal and environmental catalytic reactions. However, the pore size of the conventional zeolites is usually below 2 nm, and reactants are easily blocked to access the active sites. Herein, a facile in si...
Article
Ru-based catalysts with increased attention for CVOC purification still have huge challenges in promoting their low-temperature activity and durability. Here, a Cr-modified RuO2/TiO2 catalyst was fabricated and employed for 1,2-dichloroethane (1,2-DCE) destruction. The synergy of Cr2O3 and RuO2/TiO2 enhances the exposure of surface Ru, generating a...
Article
Though the highest CO2 capture capacity belongs to liquid amine-solutions, solid matters capable of CO2 capture are also highly sought, providing that, they offer at least analogous CO2 adsorption capacity and CO2/N2 selectivity. Herein, a surprisingly high-performance Ni-based metal-organic framework for CO2 adsorption, namely MOF-74(Ni), was synt...
Article
The reduction and control of VOCs from anthropogenic sources becomes a research hotspot due to their tremendous environment hazards. Fabricating efficient and applicable noble-metal-free monolithic catalysts is still a great challenge for industrial VOC economical removal. In this work, cordierite-based honeycomb monolithic catalysts (M/Al2O3/COR;...
Article
Introducing co-catalyst and constructing heterostructure are two of the most promising strategies in improving the photocatalytic H2 evolution performance of semiconductors. However, it has always been a great challenge to develop a facile and low-cost system to facilitate the highly efficient synergistic effect between co-catalyst and heterostruct...
Article
Full-text available
CuO@TiO2 core–shell nanostructure catalyst with CuO core and TiO2 shell was prepared by a two-step method and then used in NH3-SCR reaction. FE-SEM, TEM and element mapping were used to investigate the morphologies of the sample. Their results indicated CuO nanorods were coated with TiO2 and thus forming a core–shell nanostructure. According to the...
Article
Developing economical and robust noble metal-free materials for obstinate light alkane low-temperature decomposition is of great significance. Here, birnessite-type short rod-like MnO2 was firstly prepared by facile mixing KMnO4 and ascorbic acid under ambient conditions and employed in propane catalytic decomposition. Experimental results revealed...
Article
A new photocatalyst, the tri-arm CdS/ZnS core-shell nanorod, is carefully designed for the first time, where tri-arm CdS nanorods are decorated by dodecylamine (DDA) molecules and then wrapped in an intermittent ZnS shell. The resultant photocatalyst with a CdS/ZnS mole ratio of 0.5 (CZS0.5) presents a significantly improved H2 evolution rate of 72...
Article
NOx and toluene have been identified as the dominant air pollutants in solid wasted combustion, and it is of great importance to remove these two pollutants simultaneously. Here, we found that Mn/CeO2 and Mn/TiO2 exhibited a bifunctional property in both NO reduction and toluene oxidation, and both of which could achieve 80% of conversion rate in N...
Article
Non-vanadium-based catalysts with high SO2 tolerance are still interesting in selective catalytic reduction of NO by NH3 (NH3-SCR) and SO2 adsorption is the foremost step for the deactivation of catalysts. In order to alleviate the adsorption of SO2, we fabricated a series of rhenium (Re; without stable sulfate) supported TiO2 catalysts and studied...
Article
It is of great significance to design highly active and stable catalysts for CO oxidation. Herein, a Pt/In-SnO2catalyst was firstly fabricatedviaa facile hydrothermal reaction coupled with photoreduction strategy, achieving 1 vol% of CO totally oxidized at just 145 °C, over 200 °C lower than that of Pt/SnO2. Moreover, Pt/In-SnO2demonstrates superio...
Article
Low-temperature degradation of short chain alkane is one of the greatest challenges of volatile organic compound purification. Here, rod-, sheet-, and cube-like Co3O4 (Co3O4-R, Co3O4-S, and Co3O4-C) with predominantly exposed (110), (111), and (100) facets respectively were fabricated. Co3O4-R presents excellent activity achieving 90 % of propane o...
Article
In this work, a scaled-up electro-Fenton (EF) system was performed on the treatment of amoxicillin (AMX) wastewater. The effects of operational parameters on AMX degradation efficiency were investigated, such as Fe²⁺ concentration, pH, applied current (mA) and initial AMX concentration. Kinetic analysis exhibited the degradation process followed th...
Article
The use of plasma‐activated water (PAW) treatment is a promising technology that has many advantages, such as high efficiency, flexibility, environmental safety, no residue, etc. Thus, PAW has been applied in the agriculture industry to increase agricultural production. The application of PAW technology in agricultural production should emphasize i...
Article
Alkali metal potassium is conducive to structure promotion and electronic modulation in metal oxides. Here, K species was successfully introduced into α-MnO2 via in situ synthesis (Pre-K/MnO2) and hydrothermal impregnation method (Post-K/MnO2) with target to boost the low-temperature reactivity and deep destruction efficiency for toluene oxidation....
Article
Catalytic activity of perovskite oxides as LaMnO3+δ is greatly limited by their low surface area and deficient active site density though they are thought to be one category of desired candidates for noble metal-based catalysts. Here, a robust three dimensional ordered macroporous (3DOM) γ-MnO2/LaMnO3.15 (Mn/3DLM) was in situ fabricated by the stra...
Article
Herein, a new type of photocatalysts, Au [email protected]@ZnIn2S4 nanosheets ([email protected]@ZIS), is elaborately designed for the photocatalytic H2 evolution from water splitting, where Au nanodots (NDs) are anchored in the pore space of thiol-functionalized UiO66 metal-organic framework (MOF) and ZnIn2S4 nanosheets are wrapped around the UiO6...
Article
A new variety of CdS/NiO core-shell p-n heterojunction is synthesized by in-situ chemically depositing NiO shell on single-crystal CdS nanorods for the first time. With this method, the range of NiO shell thickness can be accurately controlled within a few nanometers. The optimized CdS/NiO sample (CSN0.5) with a NiO shell layer of 1.5 nm exhibits a...
Article
Developing facile preparation method to obtain the satisfied low-temperature catalytic performance of transitional metal oxide-based materials is still a challenge in deep degradation of VOCs. Here, a series of Mn-Cu bimetallic oxide catalysts were prepared by one-step hydrothermal-redox method for catalytic total oxidation of toluene. The CH3COOH...
Article
Fabricating of economical transitional metal oxide-based materials with satisfied low-temperature catalytic performance and application perspective is still a challenge in deep degradation of VOCs. Here, Mn-Cu bimetallic oxides were facilely prepared by one-step hydrothermal-redox method, which displayed much higher catalytic activity in toluene ox...
Article
The use of nonthermal plasma (NTP) is a promising technology that has high efficiency, safe for the environment, and free from toxic residues. Therefore, NTP has been applied in the food industry to reduce the activity of microorganisms on foods. Even after NTP treatment, the foods exhibit satisfactory high quality in terms of physical (colour and...
Article
Full-text available
Developing economical and robust catalysts for the highly selective and stable destruction of chlorinated volatile organic compounds (CVOCs) is a great challenge. Here, hollow nanosphere-like VOx/CeO2 catalysts with different V/Ce molar ratios were fabricated and adopted for the destruction of1,2–dichloroethane (1,2–DCE). The V0.05Ce catalyst posse...
Article
A new thulium (Tm) modified Mn/TiO2 catalyst is firstly prepared to remove NO at low temperature, where the TiO2 with relatively high specific surface area (184.3 m²/g) is used as carrier to support the active component MnOx, and Tm is utilized as promoter to modify the MnOx. The developed Tm-Mn/TiO2 catalyst presents significantly improved selecti...
Article
Full-text available
In this work, a new kind of CdS-ZnO core-shell nanorods with controlled ZnO shell are firstly synthesized by a simple chemical deposition method in aqueous solution. The thickness and distribution...
Article
The iron vanadate (FeVO4) nanorods are used as a carrier to support manganese (Mn) and cerium (Ce) oxides for the selective catalytic reduction (SCR) of nitrogen oxides (NOx) with NH3...
Article
SMT-Sb(V)-complexes formed when they coexisted in aqueous solution • Groups of NH 2 , N-H, S=O, C-N of SMT complexed with Sb(V) • Complexing was enhanced and followed the order of pH 7.0 > pH 5.0 > pH 3.0. • Complexation reaction inhibited the ad-sorption of Sb(V) ions by the black soil. • The adsorption capacity of Sb (V) followed the order of 3.0...
Article
Optimizing the interaction between metal active centers and support by tuning crystal facets is an effective strategy to improve activity and stability of catalysts. Herein, α-MnO2 nanowires with different exposing crystal facets (respectively; (310), (110) and (100)) were synthesized via a facile hydrothermal method to promote the activity of Au/α...
Article
Full-text available
Catalytic oxidation is one of the most efficient approaches for industrial volatile organic compounds (VOCs) elimination. MnOx-based catalysts have attracted much attention due to their remarkable low-temperature catalytic activity. Here, octahedral layered birnessite-type manganese oxide (OL-1) with layer spacing of 7 Å and cryptomelane type manga...
Article
Chlorinated volatile organic compounds (Cl-VOCs) are characterized by severe toxicity, high chemical stability, and low biodegradability. As such, they are regarded as hazardous gas pollutants. However, Cl substitution brings higher tendency in catalyst deactivation by Cl deposition, and different behaviors with the presence of water, other VOCs, N...
Article
In catalytic oxidation of Cl-VOCs, H2O, CO2, and HCl are anticipated final products, while Cl2 with strong oxidability, CO and organics without complete mineralization are considered as byproducts. The particularity of Cl substitution in Cl-VOCs further brings higher possibility in byproducts formation with higher toxicity. Furthermore, polychlorin...
Article
Due to the presence of SO2 in flue gas, SCR catalysts with high SO2 tolerance are in desperate required. However, except vanadium-based catalysts, most metal oxide catalysts exhibited low SO2 tolerance. In this research, CuSO4/TiO2, Fe2(SO4)3/TiO2, MnSO4/TiO2, Ce(SO4)2/TiO2 and CoSO4/TiO2 catalysts were prepared via a sol-gel protocol and used in N...
Article
Exploring thermally robust single atom catalysts (SACs) is of great significance. Here, we develop a universal strategy for stabilizing Pt atoms on the mono-oxygen vacancies of CeO2 with diverse exposed facets. The stabilization mechanism was proposed that the formed Pt-O-Ce interface will be taken into distortion spontaneously to keep thermodynami...
Article
Developing economical and active materials is of great significance for VOC purification. Here, hierarchical porous Al2O3 and ZnO microspheres (Al2O3-pm and ZnO-pm) were synthesized by a facile hydrothermal strategy. The urchin-like Al2O3-pm and flower-like ZnO-pm possess high specific surface area (especially; external surface area) obviously boos...
Article
Full-text available
A novel fabrication method for modifying alkaline lignin (AL) was reported, in which trimercapto-s-triazine trisodium salt was used as a modifier to tune surface properties of AL. Molecular structure of modified AL (FAL) was determined by 3D-EEM, synchronous fluorescence, FTIR, ¹³C MAS NMR and XPS. Two-dimensional correlation spectroscopy and elect...
Article
CuSO4/TiO2 catalysts with high catalytic activity and excellent resistant to SO2 and H2O, were thought to be promising catalysts used in Selective catalytic reduction of nitrogen oxides by NH3. The performance of catalysts is largely affected by calcination temperature. Here, effects of calcination temperature on physicochemical property and cataly...
Article
This research aims to enhance the SO2 tolerance of manganese oxide (MnOx) catalysts for low-temperature selective catalytic reduction (SCR) de-NOx. Based on the deactivation mechanism of MnOx, we target at the promotion of the byproduct (NH4HSO4) decomposition and the inhibition of the byproduct (MnSO4) formation. To achieve this target, thermograv...
Article
Volatile organic compounds (VOCs) are significant ozone (O3) and particulate matter (PM) formation precursors and are deleterious to both human health and environment. Catalytic combustion can degrade VOCs to H2O and CO2 without secondary pollution, suggesting a potential sustainable technology for air pollution control. However, the concentration...
Article
Alkali metal potassium has function of structure promoter and electronic modulation for metal oxides. Herein, diverse potassium precursors (KOH, KNO3, K2SO4 and KCl) were introduced to nanorods α-MnO2 through a facile post processing strategy. The presence of potassium species has a remarkable promotion effect on catalytic performance of α-MnO2. Am...
Article
To solve problems of consecutive H2O2 external supplement and reutilization difficult of free Fe²⁺ ion in traditional homogeneous photo-Fenton, an efficient solar photo-Fenton system with self-supplying H2O2 was developed based on a heterogeneous catalyst of α-Fe2O3/g-C3N4. The microstructure, physicochemical and photoelectric properties of the opt...
Article
Arsenic (As) and antimony (Sb) are listed as the priority pollutants by the U.S. Environmental Protection Agency (EPA) and the European Union (EU) due to their toxicity and potential carcinogenicity. It is necessary to investigate their adsorption over soil as such a behavior affects their mobility and bioavailability. In this study, the effect of...
Article
Arsenic (As) and antimony (Sb) are listed as the priority pollutants by the U.S. Environmental Protection Agency (EPA) and the European Union (EU) due to their toxicity and potential carcinogenicity. It is necessary to investigate their adsorption over soil as such a behavior affects their mobility and bioavailability. In this study, the effect of...
Article
Recently, Mn-based catalysts doped/modified by rare earth elements for the selective catalytic reduction (SCR) of NOx with NH3 are becoming a new research hotspot. In current work, Dy-doped MnFe oxides with the morphology of one-dimensional nanowire are successfully prepared by using electrospinning method for the first time, and the catalytic perf...
Article
A kind of alkaline lignin (AL)-based modified material (FLAL) was fabricated, in which CS2 was selected as the modifier. FLAL can be used to treat Pb²⁺ and Cu²⁺ ions loaded water. When the initial concentrations of Pb²⁺ and Cu²⁺ ions were 30 mg/L, the removal efficiencies were 97% for Pb²⁺ at 100 min while 98% for Cu²⁺ at 5 min, respectively. The m...
Article
Promoting chlorine resistance and inhibiting by-product generation are critical issues in catalytic destruction of chlorinated volatile organic compounds (CVOCs). Herein, a yolk-shell-like mesoporous CoCrOx as a robust catalyst was synthesized for deep destruction of dichloromethane (DCM) considering its superior mass transfer and molecule enrichme...
Article
Here, lauric acid (LA) with a remarkable tailoring property of pore structure and porosity was adopted as modulator for the synthesis of Mn-MIL-100. Results reveal that LA amount has a significant effect on the morphology, crystal size and porous structure of prepared materials. The synthesized catalysts were coupled with a dielectric barrier disch...
Article
A novel strategy for removal of toluene by non-thermal plasma (NTP) coupled with metal-organic frameworks (MOFs) derived catalyst was proposed in this work. The MOF-derived porous trimetallic oxide catalyst (MnCoNiOx, MCNO) was prepared by simple pyrolysis of a MOF-74(Mn-Co-Ni) precursor. We found that the MCNO material can well synergy with NTP in...
Article
Full-text available
Heterogeneous catalysts with single‐atom active sites offer a means of expanding the industrial application of noble metal catalysts. Herein, an atomically dispersed Pt1‐Co3O4 catalyst is presented, which exhibits an exceptionally high efficiency for the total oxidation of methanol. Experimental and theoretical investigations indicate that this cat...
Article
Catalyst chlorine poisoning is a critical issue to be solved for chlorine-containing VOCs decomposition. Herein, we found that three-dimensional nanosphere-like meso-macroporous MnCo3Ox (SMC-F) synthesized via a co-precipitation method has much higher activity and selectivity for 1,2-dichloroethane destruction than the bulk MnCo3Ox; however, polych...
Article
Photocatalysis is a promising method to obtain hydrogen without any pollution. The key to improve the efficiency of photocatalytic reaction is to design an excellent catalyst structure which can effectively promote the separation and transfer of photogenerated electrons and holes. In this work, a novel photocatalyst, Ni2P decorated NiO/g-C3N4 p-n j...
Article
Antimony (Sb) is listed as a priority pollutant by European Union and U.S. Environmental Protection Agency. However, reports on its environmental behavior, particularly the sorption process in soil are still limited. In this paper, Sb(V) was selected as the sorbate and the black soil as the sorbent. The initial sorption rate (k2qe,cal2) was calcula...
Article
Antimony (Sb) is listed as a priority pollutant by European Union and U.S. Environmental Protection Agency. However, reports on its environmental behavior, particularly the sorption process in soil are still limited. In this paper, Sb(V) was selected as the sorbate and the black soil as the sorbent. The initial sorption rate (k2qe,cal2) was calcula...
Article
In this work, a novel strategy, one-step vulcanization of Cd(OH)Cl nanorods in the presence of ZnCl2 and Na2PdCl4 is successfully developed to synthesize CdS/ZnS/PdS nanotubes (NTs) for the first time. With this method, the three components (CdS, ZnS and PdS) are fully combined together at nano-scale in the CdS/ZnS/PdS NTs, creating a large number...
Article
BACKGROUND Maize is used excessive pesticides during planting, storage and transportation to ensure its production, resulting in pesticides residues on maize that threaten human health. Plasma, compared with other technologies, has been widely regarded as a green, safety and promising technology for surface decontamination to ensure maize safety an...
Article
The degradation of volatile organic compounds (VOCs) with simultaneous removal of the secondary pollutant NOx is a promising solution for catalytic elimination of nitrogen-containing VOCs (NVOCs). Herein, a series of mixed CuxMg3-xAlO oxides were prepared and tested for selective catalytic oxidation of n-butylamine. The Cu content of the catalysts...
Article
Full-text available
The main objective of this work was to fully understand the bio-decontamination process in a reduced-pressure oxygen plasma. Gram-negative Escherichia coli species was chosen as the target microorganism in this test. The comparison of decontamination efficacy between plasma total and UV radiation individually under various treatment parameters and...
Article
Element doping has been extensively employed to modulate the physicochemical properties of semiconductors. In this work, Se-doped CdS quantum dots (QDs) with varied Se doping level are fabricated via a solvothermal procedure. Due to the introduction of Se, the Fermi level position of CdS is elevated to a higher position, leading to the effective ca...
Article
Pt/Eu 2 O 3 -CeO 2 materials with different Eu concentrations were prepared and applied to toluene destruction, and the remarkable promotion impact of EuO x on Pt/CeO 2 can be observed. The characterization results reveal that the presence of EuO x significantly enhances the redox property, lattice O concentration, and Ce ³⁺ ratio of the Pt/CeO 2 m...
Article
Shape effects of nanocrystal catalysts in different reactions have attracted remarkable attention. In present work, three types of α-Fe2O3 oxides with different micromorphologies were rationally synthesized via a facile solvothermal method and adopted in deep oxidation of ethane. The physicochemical property of prepared materials were characterized...
Article
In the present work, a series of MOF-74 (Ni) materials with narrow micropore channels and abundant unsaturated metal sites was respectively prepared via hydrothermal (HT), condensation reflux (CE), and microwave-assisted (MW) methods. The physicochemical properties of synthesized materials were characterized by powder X-ray diffraction, N2-sorption...