ライフサイエンスコーパス: hematite

1 these vacancies, inclusions of alpha-Fe2O3 (hematite).

2 e-like clusters, epitaxially intergrown with hematite.

3 tter deposited with a thin layer (230 nm) of hematite.

4 reoxidation with ferrihydrite, goethite, and hematite.

5 ong the (210) plane with the (0001) plane of hematite.

6 nduced by the photocatalytic activity of the hematite.

7 (-1) with goethite, and 8.8 muM day(-1) with hematite.

8 goethite, and suspensions of Fe(II)-amended hematite.

9 ns as well as in the presence of goethite or hematite.

10 of Cu-, Co-, and Mn-substituted goethite and hematite.

11 All analyses identified the red material as hematite.

12 hotoelectrochemical (PEC) water splitting by hematite.

13 ce layer of the nonmagnetic iron oxide-phase hematite.

14 chanically denatured MtrC molecules bound to hematite.

15 l tens of percent of the rock by weight, and hematite.

16 g fundamental insight into the reactivity of hematite.

17 d is lost altogether upon incorporation into hematite.

18 ity from binding to coordinated iron(III) in hematite.

19 nd 10(-6) M at pH 5 and 0.3 g/L (9.3 m(2)/L) hematite.

20 10.5) and aged to induce crystallization of hematite.

21 M day(-1); rates were less with goethite and hematite (0.66 and 0.71 muM day(-1), respectively).

22 oxidation reaction on the fully hydroxylated hematite (0001) surface.

23 i NWs absorb photons that are transparent to hematite (600 nm < lambda < 1100 nm) and convert the ene

24 via char gasification and the employment of hematite, a natural iron resource greatly extended the a

25 III) (oxyhydr)oxides goethite, magnetite and hematite added as potential nucleation sites.

26 ns, were involved in sulfate reduction, with hematite addition increasing the sulfate recycling or th

27 sulfate in all experiments (with and without hematite addition) suggests that oxidized forms of iron,

28 nstrated Ni(II) cycling through goethite and hematite (adsorbed Ni incorporates into the mineral stru

29 ngsten grown by atomic layer deposition on a hematite alpha-Fe(2)O(3)(0001) surface, we report direct

30 py (XPS) and using the Mn(II) oxygenation on hematite (alpha-Fe(2)O(3)) and anatase (TiO(2)) NPs as a

31 Hematite (alpha-Fe(2)O(3)) constitutes one of the most p

32 Uniform thin films of hematite (alpha-Fe(2)O(3)) deposited by atomic layer dep

33 igated the sorption of silicate to colloidal hematite (alpha-Fe(2)O(3)) in short-term (48 h) and long

34 Hematite (alpha-Fe(2)O(3)) is a promising photoanode mat

35 ce between Burkholderia cepacia biofilms and hematite (alpha-Fe(2)O(3)) or corundum (alpha-Al(2)O(3))

36 Hematite (alpha-Fe(2)O(3)) was grown on vertically align

37 putrefaciens strain CN-32 to the surface of hematite (alpha-Fe(2)O(3)) was studied with in situ ATR-

38 Mg-doped hematite (alpha-Fe(2)O(3)) was synthesized by atomic lay

39 hest external quantum efficiency measured on hematite (alpha-Fe(2)O(3)) without intentional doping in

40 tors that include solid metal oxides such as hematite (alpha-Fe(2)O(3)).

41 Hematite (alpha-Fe2 O3) is engineered to improve photoex

42 Using hematite (alpha-Fe2O3) as a model oxide, we show through

43 study investigated heteroaggregation between hematite (alpha-Fe2O3) colloids and citrate-capped gold

44 ly induced surface potential gradient across hematite (alpha-Fe2O3) crystals is sufficiently high and

45 homogeneous case, goethite (alpha-FeOOH) and hematite (alpha-Fe2O3) increased and gamma-alumina (gamm

46 Hematite (alpha-Fe2O3) is one of the most common iron ox

47 ier recombination in Si-doped nanostructured hematite (alpha-Fe2O3) photoanodes as a function of appl

48 emical performances for water splitting over hematite (alpha-Fe2O3) photoanodes.

49 ction of time and plutonium concentration in hematite (alpha-Fe2O3) suspensions containing initially

50 adsorbed to lepidocrocite (gamma-FeOOH) and hematite (alpha-Fe2O3) was assessed when exposed to aque

51 Here, growth of hematite (alpha-Fe2O3) within a silica hydrogel resulted

52 g afresh a popular and viable photocatalyst, hematite, alpha-Fe2O3 that exhibits most of the properti

53 ext, titanium dioxide (TiO2) and iron oxide (hematite, alpha-Fe2O3) are among the most investigated c

54 tions ultimately results in the formation of hematite, analysis of the atomic pair distribution funct

55 This structural composite of hematite and angelellite-like clusters represents a new

56 understanding of uranium incorporation into hematite and define the nature of the bonding environmen

57 esses were investigated for Ni adsorption to hematite and goethite at pH 7 in the presence of oxalate

58 uring the crystallization of ferrihydrite to hematite and goethite was explored in a range of systems

59 containing two commonly studied iron oxides-hematite and goethite-and aqueous Fe2+ reached thermodyn

60 ond order in the density of surface holes on hematite and independent of the applied potential.

61 orption spectra indicated that U(IV) in both hematite and lepidocrocite suspensions was not in the fo

62 water redox potentials and the band edges of hematite and many other low-cost metal oxides, enabling

63 Coarse crystalline hematite and olivine-rich basaltic sands were observed a

64 with ground, dark red-to-black fragments of hematite and pyrite.

65 sorptive interactions of organic matter with hematite and reductive release of hematite-bound organic

66 position and conformation on its sorption by hematite and release during the reduction reaction were

67 solution, and its interaction with insoluble hematite and small organic ligands, demonstrate the fund

68 he multihole catalysis of water oxidation by hematite, and demonstrates the hole accumulation level r

69 or K-feldspar, magnetite, quartz, anhydrite, hematite, and ilmenite.

70 an those reported for reduction of goethite, hematite, and lepidocrocite by S. oneidensis, and the or

71 ds, nanofibers, nanowires) based on titania, hematite, and on alpha-Fe2O3/TiO2 heterostructures, for

72 ce of SRNOM at pH values where Cit-AuNPs and hematite are oppositely charged, attachment efficiencies

73 s the dominant oxidation state of uranium in hematite around Eh -0.24 to -0.28 V and pH 7.7-8.6 for a

74 U(V), but not U(IV), was also detected in hematite at Eh +0.21 V (pH 7.1-7.3).

75 f the lowest turn-on potentials observed for hematite-based PEC water splitting systems.

76 e heavily cratered terrains and underlie the hematite-bearing plains explored by the Opportunity rove

77 osed in a valley and plateau to the north of hematite-bearing plains.

78 The strength of the OmcA-hematite bond was approximately twice that of the MtrC-h

79 ond was approximately twice that of the MtrC-hematite bond, but direct binding to hematite was twice

80 We found that hematite-bound aliphatic carbon was more resistant to re

81 atter with hematite and reductive release of hematite-bound organic matter.

82 onsumption of S(-II)aq proceeded slower with hematite, but yielded maximum dissolved U concentrations

83 ndamental dependencies in lead adsorption to hematite by coupling extended X-ray absorption fine stru

84 To explore whether doped hematite can exhibit an even lower overpotential, we con

85 c iron arsenate with structural relations to hematite, can epitaxially intergrow along the (210) plan

86 e thermodynamically more stable goethite and hematite changed from complete and fast to incomplete an

87 Our result indicates that a 1% hematite coating on a silica surface inhibited catechol

88 colloids is similar to that of goethite and hematite colloids.

89 hat Cr is present as Cr(3+) substituted into hematite, consistent with TEM analysis.

90 grown on cubic, rod-like, and peanut-shaped hematite core particles, we validate the argument.

91 Subsequent analyses on mixed goethite and hematite crystallization products (pH 9.5 and 11) showed

92 adsorption, the incorporation of As into the hematite crystals can be of great relevance for As immob

93 e presence of As (up to 1.9 wt %) within the hematite crystals could be demonstrated.

94 The force measurements for the hematite-cytochrome pairs were compared to spectra colle

95 tion and by spectroscopically monitoring the hematite dissolution front in the micromodel.

96 nerals, including hypersthene, magnetite and hematite, distributed in a light matrix of a resin.

97 We introduce a self-propelled colloidal hematite docker that can be steered to a small particle

98 The hematite dockers are simple single-component particles a

99 pproximately 3000 ppm) was incorporated into hematite during ferrihydrite aggregation and the early s

100 incorporation of Np(V) into the structure of hematite during its crystallization from ferrihydrite (p

101 -substituted goethite and Zn(II)-substituted hematite during reaction with aqueous Fe(II).

102 ase from Ni- and Zn-substituted goethite and hematite during reaction with Fe(II).

103 lect and store photogenerated holes from the hematite electrode.

104 In the present study we prepared thin film hematite electrodes by atomic layer deposition to study

105 impedance spectroscopy in investigations of hematite electrodes to provide key parameters of photoel

106 enhances the water-splitting performance of hematite electrodes.

107 recombination phase to recombination of bulk hematite electrons with long-lived holes accumulated at

108 Hematite (Fe(2)O(3)) is an important magnetic carrier mi

109 ynthesized using a H(2)S plasma to sulfurize hematite (Fe(2)O(3)) nanorods deposited by chemical bath

110 tect whether a specific bond forms between a hematite (Fe(2)O(3)) thin film, created with oxygen plas

111 m in the presence of a ferric oxide mineral, hematite (Fe2O3), resulted in enhanced glucose decomposi

112 e formation of magnetite (Fe3O4) rather than hematite (Fe2O3).

113 h and Cit-AuNPs are capable of destabilizing hematite following an "electrostatic patch" mechanism.

114 It addresses a critical challenge of using hematite for PEC water splitting, namely, the fact that

115 ltra-thin monolayer of a molecular Ir WOC to hematite for solar water splitting in acidic solutions.

116 xide precipitates was observed, resulting in hematite formation after 7 days.

117 0(+3), and 1.08 x 10(+2) L (mol min)(-1) for hematite, goethite, and gamma-alumina, respectively.

118 t minerals containing significant Fe and Mn (hematite, goethite, magnetite, and groutite) adsorbed Pu

119 ntmorillonite and a range of other minerals (hematite, goethite, magnetite, groutite, corundum, diasp

120 the destruction of magnetic ordering at the hematite --> Rh(2)O(3)-II type (RhII) transition at 70 G

121 mmobilization of U(VI) by incorporation into hematite has clear and important implications for limiti

122 ulk electrochemical properties, acid-treated hematite has significantly decreased surface electron-ho

123 ncement that typically precedes formation of hematite in aerobic soil and weathering environments.

124 ged presence of S(-II)aq in experiments with hematite in combination with a larger release of adsorbe

125 Reductive dissolution of hematite in porous media was investigated using a microm

126 The hematite in the micromodel was reduced by injecting pH-v

127 ed evidence that uranium was incorporated in hematite in uranate, likely octahedral coordination.

128 at mineralogical changes to ferrihydrite and hematite induced by radiation may lead to an increase in

129 l pH values, goethite, amorphous iron oxide, hematite, iron-coated sand, and montmorillonite that wer

130 Hematite is concentrated in spherules eroded from the st

131 n with the incorporation of silicon into the hematite lattice and propagate through to the nanoscale

132 standing-wave atomic images relative to the hematite lattice show dramatic (but redox-reversible) ch

133 for a coating on the rock Mazatzal, where a hematite-like sextet is present.

134 Comparisons between different phases (hematite, maghemite, and ferrihydrite) revealed that sho

135 natural mineral particles (basalt, granite, hematite, magnetite, mica, milky quartz, and clear quart

136 ds with high oxygen fugacities, close to the hematite-magnetite buffer, that can contain significant

137 shown that iron oxides, such as goethite and hematite, may recrystallize in the presence of aqueous F

138 rbon nanotubes (CNTs) and positively charged hematite nanoparticles (HemNPs) were obtained over a bro

139 Here we show that incorporation of a hematite nanorod array into a plasmonic gold nanohole ar

140 can suppress the charge recombination in the hematite nanorod photoanode in a photoelectrochemical ce

141 g single-crystal but porous alpha-Fe(2)O(3) (hematite) nanowires via topotactic transformation.

142 Hematite nodules have been reported also from the Meridi

143 Compared with hematite-only photoelectrodes, those with Si NWs exhibit

144 et silicates (approximately 20 to 30%)], and hematite; only minor jarosite is identified in Mini-TES

145 ption fine structure (EXAFS) spectroscopy on hematite particles (10 and 50 nm) with resonant anomalou

146 ibiotic with two sets of synthetic nanosized hematite particles, with relatively smooth (H10, 10-20 n

147 further enables the preparation of a stable hematite/perovskite solar cell tandem device, which perf

148 n as a function of surface hole density on a hematite photoanode employing photoinduced absorption sp

149 set potential for photocurrent generation in hematite photoanodes is typically ~500 mV anodic of flat

150 as required for water photoelectrolysis with hematite photoanodes, observed following surface treatme

151 uppression of electron-hole recombination in hematite photoanodes.

152 in film and high-aspect ratio nanostructured hematite photoanodes.

153 thodic shift of the appearance of long-lived hematite photoholes, due to a retardation of electron/ho

154 Hematite plays a decisive role in regulating the mobilit

155 and arsenite sorption was studied by use of hematite pre-equilibrated with silicate for different ti

156 ore resistant to reduction release, although hematite preferred to sorb more aromatic carbon.

157 ses investigated, with the only exception of hematite, present at least two distinct reactive pools w

158 ication of the Maastricht-Belvedere finds as hematite pushes the use of red ochre by (early) Neandert

159 Anodic bias significantly retards hematite recombination dynamics, and causes the appearan

160 couple and 769 +/- 2 mV for the aqueous Fe2+-hematite redox couple.

161 calculation of electron transfer) suggested hematite reduction as a proton-consuming reaction effect

162 e in the rate and extent of ferrihydrite and hematite reduction by S. oneidensis in the presence of a

163 Such maintenance of a stable pH through hematite reduction for enhanced glucose fermentation com

164 nts and rates of ferrihydrite, goethite, and hematite reduction over a range of negative reaction fre

165 xperiment was also performed to estimate the hematite reduction rate under the well-mixed condition.

166 that thermodynamics controlled goethite and hematite reduction rates.

167 wever, Cu release and Co and Mn release from hematite require the sum of two rates to adequately mode

168 Diagenetic features include hematite-rich concretions and crystal-mold vugs.

169 The size of hematite-rich concretions decreases up-section, document

170 water, strata with smaller and more abundant hematite-rich concretions than those seen previously, po

171 Eolian ripples, armored by well-sorted hematite-rich grains, pervade Meridiani Planum.

172 Hematite-rich spherules are embedded in the rock and ero

173 croscopic images support the hypothesis that hematite-rich spherules observed in outcrops and soils a

174 e-grained basaltic sand and a surface lag of hematite-rich spherules, spherule fragments, and other g

175 tion, with continued uptake occurring during hematite ripening.

176 us research groups have attempted to improve hematite's photocatalytic efficiency despite a lack of f

177 Acid-treated hematite showed a substantially enhanced photocurrent de

178 Goethite and hematite showed increased solubility at arid RH, but no

179 temperature Mossbauer spectrum of irradiated hematite shows the emergence of a paramagnetic Fe(III) p

180 Mini-TES spectra show only a hematite signature in the millimeter-sized spherules.

181 The reduced surface of a natural Hematite single crystal alpha-Fe(2)O(3)(0001) sample has

182 to dehydroxylation and leads to formation of hematite skins on serpentinite particles, slowing down s

183 tion mechanisms on a pure (1x1) hydroxylated hematite slab (corresponding to 1/3 ML of reactive sites

184 attributed to trace amounts of Fe(II) in the hematite structure.

185 change in protonation or in coordination to hematite surface sites as pH is modified.

186 mation of inner-sphere coordinative bonds to hematite surface sites.

187 a Ga(2)O(3) overlayer, reported to passivate hematite surface states.

188 The polymerization of silicate on the hematite surface was monitored by attenuated total refle

189 f P-based bacterial functional groups to the hematite surface.

190 eferential coordination of P-moieties at the hematite surface.

191 pecific bond between each cytochrome and the hematite surface.

192 enic can be immobilized by adsorption to the hematite surface; however, the incorporation of As in he

193 The condensation of silicate on hematite surfaces adsorbed from monomeric silicate solut

194 inner-sphere adsorption modes for all three hematite surfaces and additionally revealed outer-sphere

195 The reaction energetics on pure or doped hematite surfaces are described using a volcano plot.

196 Co- or Ni-doped hematite surfaces give the most thermodynamically favore

197 sphere bidentate complex formation of CIP at hematite surfaces in 0.01 M NaCl, irrespective of pH and

198 forms a well-defined monomolecular layer on hematite surfaces, where it assumes an orientation that

199 te, in ferrihydrite systems, and siderite in hematite systems.

200 activity; Zn release is more pronounced from hematite than goethite, whereas the opposite trend occur

201 rpentines, chlorite, smectite, goethite, and hematite) the isotopic exchange and metal-solid interact

202 When grown on n-type hematite, the p-type layer was found to create a built-i

203 e, whereas above the absorption band edge of hematite, the surface plasmon polariton launches a guide

204 y studied photoanode systems: nanostructured hematite thin films.

205 For unbiased hematite, this recombination exhibits a 50% decay time o

206 The addition of hematite to these microcosm experiments resulted in sign

207 Adding soil amendments (olivine, hematite) to the paddy soil had no effect on Sb and As c

208 apparent optical band gap dropped from 2.2 (hematite) to ~1 eV (pyrite), with completely converted l

209 The buffering effect of hematite was further supported by a greater extent of gl

210 surface; however, the incorporation of As in hematite was never seriously considered.

211 U(VI) doped hematite was synthesized and exposed to two different or

212 he MtrC-hematite bond, but direct binding to hematite was twice as favorable for MtrC.

213 hite side with an orange mix of goethite and hematite, was abandoned after breakage at Cueva Anton, 6

214 cattering (SAXS), and its interaction at the hematite-water interface by neutron reflectometry.

215 The Np(V) reactions at the hematite-water interface were comprehensively investigat

216 reactive iron minerals such as magnetite and hematite were applied.

217 anced picture of the coordination of lead to hematite while also providing fundamental insight into t

218 the particle size decreased for goethite and hematite, while for magnetite, the relative solubility w

219 The phase transformation to hematite will result in less available surface area for

220 ation of schwertmannite to a nanocrystalline hematite with greater surface area and smaller particle

221 he soil were mainly crystalline goethite and hematite, with lesser amounts of poorly crystalline ferr

222 ease the extent of reaction with goethite or hematite, with no reoxidation in this case.